CBSE Class 12

CBSE Sample Papers for Class 12 Home Science Paper 4 are part of CBSE Sample Papers for class 12 Home Science. Here we have given CBSE Sample Papers for Class 12 Home Science Paper 4.

CBSE Sample Papers for Class 12 Home Science Paper 4

Students who are going to appear for CBSE Class 12 Examinations are advised to practice the CBSE sample papers given here which is designed as per the latest Syllabus and marking scheme as prescribed by the CBSE is given here. Paper 4 of Solved CBSE Sample Papers for Class 12 Home Science is given below with free PDF download solutions.

Time: 3 Hours
Maximum Marks: 70

General Instructions:
There are total 25 questions. All questions are compulsory.

• Question nos  1-6 are of 1 mark, to be answered in one or two lines.
• Question nos 7-13 are of 2 marks, to be answered in 10-20 words.
• Question nos 14-15 case study and picture based are of 3 marks.
• Question nos 16-21 are of 4 marks, to be answered in 40 words.
• Question nos 22-25 are of 5 marks, to be answered in 50-60 words.

Questions

Question 1.
In Home Science, what is taught in the area of child development?

Question 2.
Name the nutrients we get from the sugar food group.

Question 3.
“Requirement of iodine and zinc is important in pregnancy.” Justify the statement.

Question 4.
Name the food products which do not contain sodium.

Question 5.
Nirmala has completed her Master’s degree in Child Development. How can her degree help her in subsistence?

Question 6.
State two advantages of putting money in provident fund.

Question 7.
What are the advantages of boiling method?

Question 8.
Name various types of immunity.

Question 9.
Write two social traits which develop in adolescence.

Question 10.
Name any two factors affecting the additional requirement of energy during pregnancy.

Question 11.
“The agents of socialisation play a crucial role in the process of child’s development as a social being.” Explain.

Question 12.
What is potable water? Write its two qualities.

Question 13.
Nidhi and Priyanka went to market. Priyanka wants to purchase jam but she dont know what points should be kept in mind while purchasing the jam. If you are Nidhi then what are your responsibilities towards Priyanka?

Question 14.
Suppose, income of your father is limited and not sufficient to meet all the requirements of your family. Your mother can help in supplementing the real income of your family.
On behalf of your mother, suggest six ways to supplement the income.

Question 15.
Labels are printed on the packaging of the products. What information must be provided through a label?

Question 16.
Define saving and elaborate the benefits of saving.

Question 17.
What points would you consider before washing clothes?

Question 18.
Food adulteration is a health hazard that must be countered. As a responsible and conscious citizen, what measures can you suggest to tackle the problem?

Question 19.
State some of the malpractices of shopkeepers in the area of weight and measures.

Question 20.
What points will you keep in your mind while purchasing a dress for your college going brother who is short in height?

Question 21.
It is a misconception that the more one spends on diet, the better the nutritional value one is able to get or we can say that balanced diet does not mean expensive diet. Explain the point by giving examples

Question 22.
Rajeshwar Singh is going to retire after four years. Suggest him two investment schemes for his safe old age.

Question 23.
How does socio-economic status of a child affect the cognitive development of the child?

Question 24.
Define stain and classify different types of stains along with the medium used for their removal.

Question 25.
Meal planning without the help of food group is very laborious and time consuming. How?

Answers.

Answer 1.
Complete knowledge of the physical, mental, social and emotional development of child is taught in Home Science.

Answer 2.
We get carbohydrates and iron from sugar food group. Jaggery and honey are good sources of iron.

Answer 3.
Zinc is required for growth and protein synthesis. Iodine is required to regulate the mental and physical growth of foetus. So, iodine and zinc play an important role in pregnancy.

Answer 4.
Some food products which do not contain sodium are barley, rajma, lobia, hand pounded rice, bathua, mustard leaves and pumpkin etc.

Answer 5.
Nirmala can join ICDS and NGO which are working in the field of child care.

Answer 6.
Following are the two advantages of putting money in provident fund

• Loan can be taken against it.
• It qualifies for tax rebate.

Answer 7.
The advantages of boiling method are mentioned below

• Solid substances like chalk powder, carbonic compounds and pathogenic micro-organisms are destroyed by boiling.
• Temporary hazards and salinity of water is also reduced by boiling.

Answer 8.

• Natural immunity—This is present from birth. Some antibodies are transferred from mother to child during breast feeding.
• Acquired immunity—This is present from birth but acquired later on life. It can be naturally or artificially acquired.

Answer 9.
Following are the two social traits which develop in adolescence

• Social maturity and taking responsibility.
• Attraction towards opposite sex.

Answer 10.
Following are the factors affecting the additional requirement of energy during pregnancy

• Additional energy is required for the growth of foetus.
• It is also required due to higher basal metabolic rate during pregnancy.

Answer 11.
The agent’s of socialisation in the social development of a child include parents, grandparents, siblings, friends and teachers. At home, the most important agents, are parents, grandparents, neighbours and friends. When the child starts going to school, his teachers also play crucial role in the process of child’s development as a social being.

Answer 12.
Water which is free from impurities and safe for drinking is known as potable water.
Two qualities of potable water are

1. Potable water is colourless and odourless.
2. It is free from pathogenic organism and harmful bacteria.

Answer 13.
I will tell her the following instructions

1. Differentiate between genuine and misleading labels.
2. To keep information regarding the composition method of using, date of manufacture and expiry.
3. Be judicious about standard mark and price also.

Answer 14.
My mother can supplement family income in the following manner

1. She can do her domestic chores herself.
2. She can use community facilities like public bus to go for shopping.
3. She can utilise her skills like culinary to supplement family income.
4. She can teach her children at home.
5. She can grow vegetables in pots in kitchen garden.
6. She can stitch clothes herself for family members.

Answer 15.
Bureau of Indian Standard has fixed certain standards for a complete label.
Some of these are given below

1. Name and ingredients of the product.
2. Brand name and trade mark,
3. Net weight/volume/length.
4. Use of the product.
5. Dates of manufacturing and expiry.
6. Price of product.
7. Batch and licence number.
8. Warning, if any.

Answer 16.
The portion of family income which is kept apart for the future contingencies is known as ‘saving’. Saving is the difference between income and expenditure. It can be expressed as

Savings are important for a person due to the following reasons

1. Economic Security The main aim of saving is to provide economic security to the family.
2. Increase in Income Saving increases the family income. If the savings are properly invested, additional money is earned in the form of dividends or interest.
3. For Fulfilling the Future Needs and Goals Savings are essential for different stages of life cycle. – In the initial stages when the children are small and their demands are few, one requires lesser amount of money. But in later phase, one has to spend more on the higher education, marriage etc of the children.
4. Helping in Implementation of National Plans Savings done by an individual are invested in the development plans of the nation. Savings are used for the national defence and development.
5. To Meet the Emergency of Severe Ailment or Accident A member of family needs an immediate medical attention in case of severe illness or accident. Thus, savings are used in emergency situations also.

Answer 17.
Following points should be considered before washing clothes

1. Clothes should be washed as soon as they become dirty.
2. Soiled clothes should not be kept with clean clothes and should be washed separately.
3. It is better to wash coloured and white clothes separately.
4. Soaps and detergents should be selected according to the type of cloth.
5. Before soaking heavily soiled clothes into detergent, it is better to soak them into water for a few hours. It loosens the dirt from the fabric.
6. Soaps and detergents should not be very harsh.
7. For delicate fabric, silk and woollens, select the cleaning agent accordingly.

Answer 18.
Following points are helpful in avoiding the purchase of adulterated food

1. It is necessary for every citizen to be aware of his duty in detecting adulteration and to assist the government and the law in curbing it.
2. It is the duty of every citizen to check the menace of adulteration and work actively in exposing and condemning it.
3. Offer full cooperation and help in campaign against the food adulteration.
4. Give lawful assistance to food inspectors in drawing of adulterated food samples.
5. Be prompt in giving information about specific instances of adulteration. Convey it by post or by telephone to the concerned authorities.
6. Be ready to act as a witness and to give evidence in court in such cases.
7. Take initiative in getting the food tested for adulteration.
8. Make others aware about the menace of adulteration

Answer 19.
The shopkeepers use following malpractices in the area of weight and measures

1. They deviate from standard norms and practices.
2. The shopkeepers use defective weights for weighing.
3. They use stones in place of standard weights for weighing.
4. Weight may have hollow space.
5. Magnet may be stuck at the bottom of the pan.
6. The pointer in the balance may be missing.
7. The beam may not be equally divided.
8. They use faulty measuring tape.

Answer 20.
The following points need to be considered

1. Select dark and bright colours according to his age.
2. Clothes should be comfortable.
3. Select clothes according to the latest fashion as he is college going and would prefer the latest trendy clothes.
4. The colour of shirt and trousers should be same.
5. Select clothes with vertical lines as it gives an illusion of height.
6. Clothes should be well-fitting, neither too tight nor too loose.
7. The fabric should be chosen with care.
8. Clothes should be purchased according to the season.

Answer 21.
A wrong notion that exists in our minds is that ‘food which is expensive is of better nutritive value’. On the contrary, we find that foods which are cheap are often very rich in nutritive value. Proper selection and judicious meal planning can help in obtaining maximum nutritional value and affecting economy. To prove this statement, we can take few instances

• Low cost cereals like ragi, jowar, bajra etc are more nutritious than expensive cereals like rice and wheat.
• Sugar is costlier than jaggery, but the latter contains iron which is not present in sugar.
• Almonds are very good for health, but the cheaper groundnuts are equally nutritious.
• In the same way, seasonal fruits and vegetables are not expensive but are nutritious.
  Thus, high quality foods are not expensive if you know how to choose them.

Answer 22.
The two investment schemes for his safe old age are following

1. Insurance Policy It provides security to a person from natural and man-made losses.
   From 1st January, 2014, service tax is being revised on insurance scheme.
   According to this agreement, the insurer has to deposit a fixed amount as premium at regular intervals.
   In return, the insurance is of two types
   • General Insurance This insurance ensures compensation in the case of theft, fire, floods, drought etc.
   • Life Insurance It is one of the best means of investment. When we opt for an insurance policy, we have to save some money to pay for the premium at regular intervals. Life insurance compensates the economic loss of the insurance against death due to accident or hazards to life.
2. Provident Fund Schemes This scheme was started by the Government of India in J.952. This is a safe method of investment. This scheme is for all the sections of employees and it is compulsory for all of them. Every employee invests a part of his income in this scheme.
   This scheme is of two types
   1. General Provident Fund This scheme is for Government employees. In this scheme, every employee has to pay a minimum of 10% of his basic pay per month. After retirement or incase of death this amount along with interest is paid to the employee or to his nominee. This money is exempted from income tax.
   2. Contributory Provident Fund This is for non-government or semi-governmental employees. In this scheme each employee contributes a minimum of 8% of this basic pay. An equal amount is contributed by the employer. This amount along with interest is paid to the employee at the time of retirement.

Answer 23.
Socio-economic status of a child affects the cognitive development of the child in the following ways

• Sensory Development If the sensory development is good, cognition will also be proper as it depends upon the sensations we receive from the environment.
• Motor Development It refers to the ability to move and coordinate the different parts of the body to perform different skills as crawling, walking, standing, grasping etc.
• Intelligence If the child is intelligent, his cognitive development will be good because then he will understand his environment in better way.
• Curiosity The children who are more curious and ask more questions, are able to form good concepts and their cognitive development is also good.
• Opportunity for Learning Children who get more and better opportunities of learning are able to have good cognition and that too with a good pace.

Answer 24.
‘Stain A stain can be defined as any unpleasant mark or spot which if remains unremoved, has the effect of spoiling the appearance of cloth/fabric. Different types of stains are found on clothes. Some of them are as follows

• Vegetable Stains Stains of tea, coffee, fruits and vegetables are called vegetable stains. Alkaline medium is used to remove these stains.
• Animal Stains Stains of milk, meat, eggs and blood come under this category. To remove these types of stains, they need to be washed with detergent in cold water. The stains become permanent if washed in hot water.
• Oil Stains These stains are of oil, ghee, butter etc. These stains are removed by the use of grease solvents and absorbent.
• Mineral Stains The stains of ink, rust, coal tar and medicine are known as mineral stains. These stains should be washed first in acidic and then in alkaline medium.

Answer 25.
It is quite difficult to do meal planning without the help of food groups because of the following reasons

• Recommended Dietary Allowances Indian Council of Medical Research (ICMR) has recommended daily dietary allowances for Indians of different age groups, class, sex, work and during special conditions keeping in mind the Indian conditions.
  It means that a meal planner needs to include different food groups to cater to the requirements of everyone in the family.
• Food Groups Different foods have varied amount of nutrients. Hence, we require different food products for a balanced diet. But if we don’t include different food groups and stick to some particular type or types of food, then it will become a stupendous task for the meal planner.
  If we keep on calculating the nutritive value of different food stuffs everyday, it would require lots of time and labour.

We hope the CBSE Sample Papers for Class 12 Home Science Paper 4 help you. If you have any query regarding CBSE Sample Papers for Class 12 Home Science Paper 4, drop a comment below and we will get back to you at the earliest.

CBSE Sample Papers for Class 12 Informatics Practices Paper 5 are part of CBSE Sample Papers for Class 12 Informatics Practices. Here we have given CBSE Sample Papers for Class 12 Informatics Practices Paper 5.

CBSE Sample Papers for Class 12 Informatics Practices Paper 5

Students who are going to appear for CBSE Class 12 Examinations are advised to practice the CBSE sample papers given here which is designed as per the latest Syllabus and marking scheme, as prescribed by the CBSE, is given here. Paper 5 of Solved CBSE Sample Paper for Class 12 Informatics Practices is given below with free PDF download solutions.

Time : 3 hrs
Maximum Marks : 70

General Instructions

• All questions are compulsory.
• Answer the’questions after carefully reading the text.

QUESTIONS

Question 1.
(a) Define a network. What are the different types of networks?
(b) Two neighbourhood schools at a distance of 120 m from each other have decided to join their LkNs using UTP cable, so that they can share their E-Learning resources. But after joining their LANs, they are not able to share the resources due to loss of signal in between. Which device should they use so that signal is amplified in between?
(c) Write the difficulty to sell the software developed using open source software.
(d) What is the mechanism that obtains IP address using a URL of a website?
(e) Define the following terms: (i) Data channel (ii) Baud
(f) Discuss about MODEM. What is its function?
(g) Write down the various facilities provided by the server.

Question 2.
(a) Write HTML code to produce a TextArea with 20 rows and 10 columns.
(b) Identify invalid vanable naines out of the following. State reason if invalid.
(i) switch
(ii) sum 12
(ii) address
(iv) Name
(c) Briefly explain the different GUI output methods used in Java.
(d) Write code for the event handler of a radio button so that when it is selected/unselected, its text changes to “Selected” or “Unselected”.
(e) (i) Rewrite the following program code using if else statement:

int a=jComboBox1.getSelectedlndex ( ) ;
switch(a)
{
case 0 :
GrandTotal=0. 10 * BillAmt ;
break ;
case 1 :
GrandTotal=0 .9 * BillAmt ;
break ;
case 2 :
GrandTotal=O. 8 * Bill Amt ;
break ;
default :
GrandTotal=BillAmt ;

(ii) Neelam has to design two Web pages with following specffications write HTML tags for these :
I. One Web page should have ordered list.
II. Another Web page should have horizontal rule with color ‘Blue’.

Question 3.
(a) How would you display system date as the result of a query?
(b) Following are some statements :

CREATE TABLE EMPLOYEE
(
Emp_Id INT NOT NULL ,
OrderNo INT NOT NULL ,
Emp_rank INT ,
PRIMARY KEY(Emp_Id) ,
FOREIGN KEY(Emp_rank) REFERENCES Persons(Emp_rank)
) ;

Identify the number and types of constraints in the above table EMPLOYEE.

(c) Ahuja entered the following SQL statement to display all workers of the country “US” and “India” from the table “PROFIT”.

SELECT*FROM PROFIT WHERE Country='US' AND Country-'India' ;

Rewrite the correct statement, if it is wrong.

(d) Consider the table :

(i) Write query to display Emp_Name, Emp_Salary whose name starts from ‘S’.
(ii) Delete the record of employee Neeru from the table COMPANY.

(e) (i) Consider the CUSTOMER table.

The following SQL queries are executed on the above table :

INSERT INTO CUSTOMER VALUES ('C106', ‘Aakash’) ;
COMMIT ;
UPDATE CUSTOMER SET Cust_Name='Abhishek' WHERE Cust_ID='C104'; SAVEPOINT P ;
INSERT INTO CUSTOMER VALUES ('C107','Chris') ;
SAVEPOINT Q ;
INSERT INTO CUSTOMER VALUES ('C108Gagan’) ; 
SAVEPOINT R ;
ROLLBACK TO Q ;

What will be the output of the following SQL query now?

SELECT*FROM CUSTOMER ;

(ii) An attribute P of datatype VARCHAR (30) has the value “Rastogi”. The attribute Q of datatype CHAR(30) has value “Garg”. How many characters are occupied in attributes P and Q?

Question 4.
(a) What will be the value of variables’m’ and ‘n’ after the execution of the following code?

int m,n = 0 ;
for(m = 1; m <= 4; m++)
{
n+=m; 
n- -;
}

(b) (i) Write the corresponding Java expressions for the following mathematical expressions :

(c) (i) What is XML editor? Also, write Free XML editors.
(ii) The following code has some error(s). Rewrite the correct code underlining all the correction made.

float m=6, float n=1,p=1 ;
do ;
{
p==p*n ;
n++ ;
while (n<=m)
j TextFieldl.setText (" " +p) ;
}

(d) Read the following case study and answer the questions that follow :

Mr. Das is working as a Chief Information Officer in AMD constructions company. In the month of January, he received a letter from the management to store all his employees information in electronic form. He decided to develop a small software application form to store employee’s personal data. He instructed one of his juniors to make a form in Java swing to enter employees information. The junior presented the following form to Mr. Das.

The form details are given in the following table :

(i) Write a code snippet on Action Event of ClearFormBTN button to clear Text Field objects, set default choice in the Radio Buttons to Female and clearing all CheckBox controls.
(ii) Write a method ProCheckQualification to be called in the Submit Button’s Action Event. The procedure code will perform the following action:

If the Check Box PostGraduateCB is checked, then the procedure will automatically check the CheckBoxes GraduatcCB and lntermediateCB irrespective of their initial state. Similarly, if the CheckBox GraduateCB is checked then automatically check IntermethateCB, otherwise only IntermediateCB should be automatically checked.

(iii) Write a method ProConvertCase to convert all the employee details in NameTF, FatherNameTF, MotherNameTF and AddressTF to upper case characters.

Question 5.
(a) How do you select all rows from a table named “PRODUCT’ where the value of the column “Product_name” starts with “B”?
(b) What is null value in MySQL database?
(c) (i) Riya Pandey is the Manager of company named Royal, she wants to create a table ‘EMPLOYEE’ to store details of her company.

I. Which of the following can be the attribute(s) of ‘EMPLOYEE’ table?
i. EmpNo
ii. ”Rahul”
iii. Name
iv. 115

II. Name the primary key of the table ‘EMPLOYEE’. State reason for choosing it.

(ii) Write the output of the following SQL queries :

I. SELECT TRUNCATED.864,2) ;
II. SELECT RIGHT(CONCAT(’PUBLICATION', 'ARIHANT'), 4) ;

(d) Consider the following table named “BANK” with details of account holders.
Write commands in SQL for (i) and (ii) and outputs for (iii) and (iv).

(i) To display all information of account holders whose transaction value is not mentioned.
(ii) To add another column Address with datatype VARCHAR and size (30).

(iii) SELECT Name, Balance FROM BANK WHERE Name LIKE '%i%' ;
(iv) SELECT ROUNDCBalance, -3) FROM BANK WHERE AccountNo = ’B2436’ ;

Question 6.
(a) (i) Write a MySQL command for creating a table ‘SUPPLIERS’

(ii) In a database Bank, there are two tables CUSTOMER and TRANSACTION with the following contents :

I. The Cust_ID column in the CUSTOMER table is the key.
The Cust_ID column in the TRANSACTION table is a key.

II. Identify the attributes, which can be chosen as candidate keys in the table CUSTOMER. Also, define candidate key.
(b) With reference to the above given tables (in Q.6 (a) (ii)), write SQL commands for (i) and (ii) and output for (iii).

(i) To add a column Tranjfype with datatype VARCHAR and size 15 in the table TRANSACTION.
(ii) To display Cust_ID, Cust_Name, Account_No, Tran lD, Amount where Amount is greater than 5000.00

(iii) SELECT Cust_ID, Cust_Name, Tran_ID, Amount 
FROM CUSTOMER, TRANSACTION
WHERE CUSTOMER.Cust_ID = TRANSACTION.Cust_ID 
AND Account_Type = "Saving" ;

Question 7.
(a) Define front-end of an information system.
(b) E-Business is useful for both businessmen and customer. What benefits does an E-Business offer to the customer?
(c) Muskan works for a store. She wants to create controls on a form for the following functions. Which controls should she use? Choose appropriate controls from TextBox, Label, OptionButton, CheckBox, IistBox, ComboBox, CommandButton.

ANSWERS

Answer 1.
(a) A network is an interconnected collection of autonomous computers and devices via same kind of transmission machine. Networks can be classified into three categories which are as follows:

1. Local Area Network (LAN)
2. Metropolitan Area Network (MAN)
3. Wide Area Network (WAN)

(b) Repeater is a device used to amplify signals.

(c) Sometimes there is no commercial market for software. You cannot sell software using previous trademarks, which is developed by another person.

(d) Domain Name Resolution.

(e) (i) A data channel is the medium used to carry information or data from one point to another.
(ii) Baud is the unit of measurement for the information carrying capacity of a communicatton channel of analog type. It is synonymous with bps (bits per second) of digital type circuit.

(f) A modem is a computer peripheral device that connects a workstation to other workstations via telephone lines and facilitates communications. It is short form for MOdulation/DEModulation. Modem converts digital signals into analog signals and vice-versa.

(g) Facilities provided by the server in a network environment are as follows:

1. Resource sharing
2. Centralised database storage
3. Internet sharing with authentication
4. Account monitoring

Answer 2.

(a) <TEXTAREA rows= "20" cols= “10” name= "tar” > Enter detail</TEXTAREA>

(b) (i) switch is invalid because variable names must not be a keyword.
(c) For displaying an output in a Java program, we can use either of the two methods. which are as foIlows:

System.ouiprint ( ) This method displays the text and keeps the cursor in the same line.
System.out.printin ( ) This method displays the text and then moves the cursor to the next line.

(d) private void RdBtnStateChanged ( javax.swing.event.ChangeEvent evt )
{
//RdBtn is the name of Radio Button 
if ( RdBtn.isSelected ( ) )
RdBtn.setText ("Selected") ;
else
RdBtn.setText ("Unselected") ;
}

(e) (i) The rewritten code with the use of if else Statement is as follows :
int a=j ComboBox1.getSelectedlndex( ) ; 
if (a==0)
GrandTotal=0.10*Bill Amt : 
else if(a==1) .
GrandTotal=0.9*BllAmt ; 
else if(a==2)
GrandTotal=0.8*BillAmt;
else
GrandTotal=BillAmt ;
(ii) I. <0L> <LI>
II. <HR color='blue'>

Answer 3.
(a) To obtain current system date :

SELECT CURDATE ( ) ;

(b) There are three constraints defined in EMPLOYEE table, are as follows :
(i) Two NOT NULL constraints for column Empjd and OrderNo.
(ii) One PRIMARY KEY constraint for column Empjd.
(iii) One FOREIGN KEY constraint for column Emp_rank.

(c) The correct code is,

SELECT*FROM PROFIT WHERE Country='US' OR Country-'India' ;

(d)

(i) SELECT Emp_Name, Emp_Salary FROM COMPANY WHERE Emp_Name LIKE'S%' ;
(ii) DELETE FROM COMPANY WHERE Emp_Name='Neeru' ;

(ii) The number of characters occupied in attribute P has value Rastogi are 7 and in attribute Q has value Garg are 4.

Answer 4.
(a) Value of m 5 and n = 5

(b) (i) I. float A = (((b + f) / c ) - d) ; 
II. float z = x * x * x + y * y - (sqrt(x*y))/2 ;

(ii) Java code is ;
float price=Float.parseFloat ( j TextField1.getText ( ) ) ;
int quantity=Integer.parselnt ( j TextFleld2.getjext ( ) ) ;
float tot=price*quantity ;
float tax=tot*10/100 ;
j TextFleld3.setText(” “+tot) ;
j TextField4.setText(” “+tax) ;

(c)
(i) XML editor allow you to create and manipulate XML documents. The basic features which you need are syntax highlighting, color code to make XML easier to read and understand.

Free XML editors

1. XML look top
2. XML mind standard Edition
3. Peter’s XML editors

(d) (i) private void ClearFormBTNActionPerformed(javax.swing.event.ActionEvent evt)
{
NameTF.setText (" ") ;
FatherNameTF.setText (" ") ;
MotherNameTF.setText (" ") ;
AddressTF.setText (" ") ;
FemaleRB.setSelected(true) ;
IntermediateCB.setSelected(false) ;
GraduateCB.setSelected(false); 
PostGraduateCB;setSelected(false) ;
}
(ii) void ProCheckQual ification ( )
{
if (PostGraduateCB.isSelected ( ) )
{ 
GraduateCB.setSelected(true) ;
IntermediateCB.setSelected(true) ;
}
else if (GraduateCB.isSelected ( ) )
{
IntermediateCB.setSelected(true) ;
} 
else
IntermediateCB.setSelected(true) ;
}
(iii) void ProConvertCase ( )
{
String Name = NameTF.getText ( ) ;

NameTF.setText(Name.tollpperCase( ) ) ;
String Fname = FatherNameTF.getText( ) ; 
FatherNameTF.setText(Fname.toUpperCase( ) ) ;
String Mname = MotherNameTF.getText( ) ;
MotherNampTF.setText(Mname.tollpperCase( ) ) ;
String add = AddressTF.getText( ) ; 
AddressTF.setText(add.toUpperCase( ) ) ;

}

Answer 5.

(a) SELECT* FROM PRODUCT WHERE Product_name LIKE ’B%’ ;

(b) If a column in a row has no value, then column is said to be null, or to contain a null.
(c) (i) I. i. EmpNo ii. Name

II. Primary key is EmpNo as it will be unique for each employee of the company.
(ii) Output of the above queries :

(d) (i) SELECT * FROM BANK WHERE Transaction IS NULL ;
(ii) ALTER TABLE BANK ADD Address VARCHAR(30) ;

Answer 6.

(a) (i) CREATE TABLE SUPPLIERS
( 
Product_id INT(4),
Product_Name CHAR(10),
Quantity I NT (10),
Price DECIMAL (7,2),
Phone CHAR (10)
) ;

(ii) I. Primary, Foreign
II. Candidate keys: Cust_ID, Account_No

A candidate key can be defined as a column or set of columns, in a table that can uniquely identify any database record without referring to any other data.

(b) (i) ALTER TABLE TRANSACTION ADD Tran_Type VARCHAR (15) ;
(ii) SELECT Cust_ID, Cust_Name, Account_No, Tran_ID, Amount 
FROM CUSTOMER. TRANSACTION
WHERE CUSTOMER.Cust_ID=TRANSACTION.Cust_ID AND Amount>5000.00 ;

Answer 7.
(a) Front-end of an information system This is the user interface that the users see and which is responsible for interacting with the user. The front-end is responsible for receiving user’s queries, requests etc., and passing it over to the back-end.

(b) E-Business offers following benefits to the customers :

1. Improved speed of response
2. Cost savings
3. Improved efficiency and productivity
4. Improved customer service.

We hope the CBSE Sample Papers for Class 12 Informatics Practices Paper 5 help you. If you have any query regarding CBSE Sample Papers for Class 12 Informatics Practices Paper 5, drop a comment below and we will get back to you at the earliest.

CBSE Sample Papers for Class 12 Home Science Paper 3 are part of CBSE Sample Papers for class 12 Home Science. Here we have given CBSE Sample Papers for Class 12 Home Science Paper 3.

CBSE Sample Papers for Class 12 Home Science Paper 3

Students who are going to appear for CBSE Class 12 Examinations are advised to practice the CBSE sample papers given here which is designed as per the latest Syllabus and marking scheme as prescribed by the CBSE is given here. Paper 3 of Solved CBSE Sample Papers for Class 12 Home Science is given below with free PDF download solutions.

Time: 3 Hours
Maximum Marks: 70

General Instructions:
There are total 25 questions. All questions are compulsory.

• Question nos  1-6 are of 1 mark, to be answered in one or two lines.
• Question nos 7-13 are of 2 marks, to be answered in 10-20 words.
• Question nos 14-15 case study and picture based are of 3 marks.
• Question nos 16-21 are of 4 marks, to be answered in 40 words.
• Question nos 22-25 are of 5 marks, to be answered in 50-60 words.

Questions.

Question 1.
Some boys are going for trekking. Which method of water purification should they follow?

Question 2.
As a subject of study, Home Science provides knowledge about various skills. What is its specific concern?

Question 3.
Economic status has a great effect on cognitive development. Explain the statement in brief.

Question 4.
Name the elements of art used in dress making.

Question 5.
What do you understand by standardised marks?

Question 6.
While buying food products, cleanliness and quality are given the first priority,otherwise it may lead to health problems. How can it be ensured?

Question 7.
Mohit is suffering from severe cough and vomitings. Name the possible disease, he could be suffering from. Write two important points for Mohit’s mother should keep in mind while looking after him.

Question 8.
Adolescence is a period when significant level of emotional stress is there. State any two causes of this stress.

Question 9.
Ramesh was cheated by a dealer who influenced him to buy a sub-standard AC. After some days Ramesh is very disappointed because AC is not working effectively. State the way in which his loss could be compensated.

Question 10.
One of your friends has a keen interest in clothing and textile industry. She wants to start her own business in the same field. Suggest her two ways in order to establish her business

Question 11.
Milk scores above all other food items, when it comes to provide nourishment and is considered a complete food. Why?

Question 12.
What do you understand by consumer aids? Give a list of some consumer aids

Question 13.
Washing clothes with detergents is easy comparatively washing with soaps. How will you define detergents?

Question 14.
Raghu is suffering from paralysis due to which he is not able to work any more. During the treatment, doctor ascribed it to some adulterant in his food. Can you name this adulterant?
Write two symptoms that can be seen in Raghu and also mention some ways to prevent purchasing adulterated food.

Question 15.
How will you describe the following figure briefly?

Question 16.
Intoxication is a curse that harms the entire prospects of teenagers. Enumerate various ways in which its bad effects are manifested.

Question 17.
Maintaining a household account is quite advantageous for welfare of a family. Write some of the benefits of keeping household accounts.

Question 18.
18. Two friends, Neha and Ria bought some edible ingredients for their cookery classes. Neha bought loose/unpacked items while Ria bought the product bearing a well marked label. In what way, Ria will be better informed than Neha about the product.

Question 19.
Selection of clothes reveals a great deal about a man’s values and culture and is an effective barometer to judge his personality. Explain and justify the assertion.

Question 20.
Woollen clothes require a proper care while washing them. Explain the method of washing woollen clothes in context of the given statement.

Question 21.
Due to intense work pressure at home and office, working women sometimes suffer from stress that results in hypertension. Define hypertension. What are its symptoms that can help in diagnosing the problem?

Question 22.
‘Keeping kitchen clean and clear is as important as our body.” Justify this statement

Question 23.
Give reason behind the supplementation of family income and mention any four factors affecting the supplementation of family income.

Question 24.
Inclusion of a food for nutrition is based on a plethora of factors. Write a short note on the factors which are behind food selection by families

Question 25.
What is investment? Describe three points that should be kept in mind while selecting an appropriate method of investment.

Answers.

Answer 1.
They should use chlorine tablets to disinfect water as it is easy to carry them while travelling.

Answer 2.
The specific concern of the subject Home Science is the knowledge about home and its management.

Answer 3.
Better economic status gets more opportunities and better training which helps in better cognitive development.

Answer 4.
Line, colour and texture are the elements of art used in dress making.

Answer 5.
Our government has fixed some minimum standards. Products which confirm to these standards are found to be of good quality after certain tests are given standardised marks.

Answer 6.
To ensure that food products are safe and of good quality, purchase food products only from reliable and recognised shops.

Answer 7.
Mohit is suffering from pertussis (whooping cough). Mohit’s mother should keep the child warm, avoid exercise and provide treatment as prescribed by the doctor.

Answer 8.
Adolescents undergo high level of stress due to the following reasons

1. Due to physical changes, emotionality of the young adolescent is greatly influenced and this causes stress.
2. Adolescence is the period when adolescents worry about their future. They are not sure of their capabilities and remain under stress continuously.

Answer 9.
Ramesh’s loss can be compensated by seeking a redressal in the consumer court. For this, he needs to follow the proper’procedure of filing a complaint. If his complaint is proved to be genuine, his grievance will be answered and he will be duly compensated for his loss.

Answer 10.
She can adopt following ways in order to start her own business

• She can sell suits and dupattas of latest fashion by opening her own boutique.
• She can set-up readymade garments business.

Answer 11.
Milk is considered a complete food because all nutrients are present in right proportion in it, except Vitamin C and iron.

Answer 12.

• Consumer Aids Aids which guide consumers in selecting quality goods according to their requirements are known as consumer aids.
• Form of Consumer Aids Standardised marks, labels and advertisements are some form of consumer aids

Answer 13.
Detergents are carbon compounds which are not alkaline. They are cleaning agents and absorbents. They are used to clean soft and delicate clothes. Thats why washing clothes with detergents is easy comparatively washing with soaps.

Answer 14.
The name of the adulterant is kesari dal or Lathyrus sativus.

• Symptoms
  • Raghu has pain in his ankle joints.
  • Raghu’s knees have become stiff.
• Prevention
  • Only sealed packets should be bought.
  • Buy food with standard mark/Agmark.
  • Do not buy open pulses or cereals.
  • Buy products only of reputed company or reputed brand.

Answer 15.
This is the picture of a solar cooker. It works on solar energy. It consists of several parts which are helpful to make it work. This cooker traps the heat insideit through which the food is cooked. It takes longer time.

Answer 16.
These days, most of the teenagers are indulged in the consumptions of intoxicants. Effects of such habits are really very bad.
Some bad effects of intoxicants on teenagers are mentioned below

1. The adolescent loses self-confidence and control over himself.
2. Ability to think and reason is also affected.
3. The adolescent starts losing the ability to take decision and shirks responsibility.
4. Both mental and physical stamina is adversely affected.
5. Liver is also damaged due to the consumption of intoxicants.
6. The effect of drugs makes the adolescents feel very light and forget all his problems for a short • while, but ultimately the drugs make the body weak and hollow.
7. Adolescents consuming intoxicants don’t give proper attention to their studies.
8. They become a part of bad company and lose their values.

Answer 17.
Advantages of keeping household accounts are listed below

1. By keeping household accounts, it is easier to spend money. By this, one can be informed about the money that has been spent on different things.
2. Accounting helps in avoiding disputes regarding payments. Shopkeeper cannot cheat anyway if
   the purchases are made on credit. One is aware of the goods purchased, payment made and the balance left. .
3. It helps in checking the expenditure incurred in one month with that of the other month. The checks can be applied if the expenditure exceeds in a month as compared to the previous month.
4. Accounting helps in judicious spending and savings by families for future incidental expenses.
5. The habit of keeping accounts by parents helps children develop the habit of judicious spending.

Answer 18.
A label informs the consumer about the quality and method of its usage. Label is engraved, printed or pasted on the package (i.e. bottle, container, packets etc) of the product. Bureau of Indian Standard has fixed certain standards for a complete label.
A product with a complete label provides valuable information to the consumer regarding

1. Name of the product.
2. Ingredients of the product.
3. Weight and quality of the final product.
4. Date of manufacture.
5. Date of expiry.
6. Price of product.

Answer 19.
Selection of clothes should be very judicious so that we can buy best clothes by spending minimum amount of money. The clothes should be compatible with age, personality and climate, and should not be an hindrance in normal working. Some factors affect the selection of clothes, which may vary from person to person as they are influenced by the requirement of the person.
These factors are discussed below

1. The personal value and culture of a person can be judged easily from his dress.
2. Clothes highlight the salient features of the personality and camouflaging the figure flaws to some extent.
3. Improper dressing makes person a laughing stock and causes inferiority complex. On the other hand, proper dressing helps in building self-confidence which is essential for the proper development of personality.
4. Proper dressing affects our behaviour and mannerism, and develops harmony and personality.

Answer 20.
The method of washing woollen clothes is listed below

1. Preparation Before washing, the clothes should be dusted with brush and repairing should be done. Mild detergent recommended for woollen clothes should be chosen. Clothes should be traced on a brown paper.
2. Soaking Clothes should be soaked for 10-15 minutes. They should be washed in lukewarm water. The brush should not be used. They should be rubbed lightly.
3. Rinsing Clothes should be property rinsed and water should be removed by pressing between palms. Clothes should not be squeezed
4. Drying Clothes should be dried in shade and spread on the brown paper to retain their shape. Clothes should not be hanged otherwise they will lose their shape.
5. Finishing After drying, clothes should be steam-pressed. Clothes should be ironed by applying water through cloth pad to give them good finish.

Answer 21.
Hypertension Regular flow of blood from heart in the body is due to diastolic and systolic pressure of heart. If there is any obstruction in the flow of the blood, then heart has to pump the blood with more force causing high blood pressure. This state is known as hypertension.
Symptoms of hypertension am as follows

• Headache especially in the near head.
• Giddiness, gastritis, nausea and vomiting.
• Indigestion
• Psychological disorders
• General yveakness

Answer 22.
Cleanliness in the kitchen is very essential for preventing the contamination of food. Food cooked in an unhygienic kitchen is not suitable for consumption. Cockroaches, lizards, flies etc abound in a damp and dirty kitchen. All these factors make the food unhygienic and contaminated in one way or the other.
Given below am some ways which can help to keep kitchen dean

1. Clean kitchen daily to keep insects and pests away.
2. Few hours of sunlight in the kitchen are needed to remove the dampness besides killing some bacteria.
3. Kitchen doors and windows should be flyproof and hence have mesh on them.
4. Also ensure the sufficient supply of potable water in the kitchen with proper drainage system.
5. There should be proper system of ventilation in the kitchen.

Answer 23.
It is very difficult for middle income group to fulfil all the requirements and needs of the family and maintain a general level of living standard. In order to improve economic resources, therp is a need to supplement family income.
Following am some factors which affect the supplementation of family income

• To Fulfil the Basic Needs of Family Money is needed to fulfil the basic needs and other comforts of life. But it is difficult to meet these expenses in limited income. Day-by-day, prices rise but the income remains same. So, to improve the financial status, it is necessary to supplement the family income.
• To Ensure Savings For security and to meet incidental expenses like marriage, higher education and illness, monthly saving is required. But due to inflation, it has become difficult to save after meeting family expenses.
• To Raise the Standard of Living Everybody wants to enjoy luxuries and comforts of life. He wants . to maintain a high standard of living. For this, he needs to supplement his family income.
• To Secure Future Every person wants to ensure a secure future for his family. At the time of unexpected happenings, saved money proves to be helpful. So, one needs to supplement his family income to have an assurance of secure future.

Answer 24.
The important basis for food nutrition is the selection of various food products. Therefore, inclusion of such foods in diet is must for the family and their satisfaction.
Following are some factors that are responsible for the selection of food

1. Family Food Values The inclusion of any food product is based on the food values of the family. Some particular kind of food preferred by one family may be obnoxious to the other.
2. Availability of Foodstuffs Availability of most of the foodstuffs especially fruits and vegetables depends on the season. Seasonal foods are nutritive and inexpensive.
3. Economic Ability The selection of foods depends on the economic ability of a family to a large extent. If the income of the family is not very high, it becomes little difficult to include high quality foods in diet as it is of high price.
4. Culture Selection of food is affected by religion, caste and culture as people belonging to Punjabi culture prefer to eat ‘Makki di Roti te Sarson da Saag’. Rice and fish is eaten by the Bengalis.
5. Effect of Peer Group Acceptance by friends and acquaintances greatly affects the choice of foods, specially in adolescents. Some foods are eaten only because these are consumed by the “peer group.

Answer 25.
Investment It is all about securing the future and it requires the detailed information of various sources of investment through the persons who have knowledge and experience in the field.
Investment of money is a very delicate matter, so one should take care of the following points

1. Safety of Principal Amount Investment is a money spent in the hope of future benefit and for this the principal amount should be secured and invested in multiple schemes rather than in only one.
2. Profit and Risk in Investments It should ensure adequate return and return on investment should be in proportion to the risk factors. At personal level, money transaction may fetch higher profit, but the chances of getting back the principal amount along with interest are less comparatively.
3. Liquidity It refers to the availability of the investment at the time of requirement without any depreciation. Principle of liquidity is very important to investor because when he will need money is uncertain.

We hope the CBSE Sample Papers for Class 12 Home Science Paper 3 help you. If you have any query regarding CBSE Sample Papers for Class 12 Home Science Paper 3, drop a comment below and we will get back to you at the earliest.

CBSE Sample Papers for Class 12 Home Science Paper 2 are part of CBSE Sample Papers for class 12 Home Science. Here we have given CBSE Sample Papers for Class 12 Home Science Paper 2.

CBSE Sample Papers for Class 12 Home Science Paper 2

Students who are going to appear for CBSE Class 12 Examinations are advised to practice the CBSE sample papers given here which is designed as per the latest Syllabus and marking scheme as prescribed by the CBSE is given here. Paper 2 of Solved CBSE Sample Papers for Class 12 Home Science is given below with free PDF download solutions.

Time: 3 Hours
Maximum Marks: 70

General Instructions:
There are total 25 questions. All questions are compulsory.

• Question nos  1-6 are of 1 mark, to be answered in one or two lines.
• Question nos 7-13 are of 2 marks, to be answered in 10-20 words.
• Question nos 14-15 case study and picture based are of 3 marks.
• Question nos 16-21 are of 4 marks, to be answered in 40 words.
• Question nos 22-25 are of 5 marks, to be answered in 50-60 words.

Questions.

Question 1.
What is meal planning?

Question 2.
State the importance of diet therapy.

Question 3.
A shopkeeper does not keep the products bearing FPO mark. In what way is he denying the assurance of quality products to his customers?

Question 4.
Ananya’s aunt sent her an expensive woollen sweater from New Zealand on her birthday. Give two tips to her for storing the sweater.

Question 5.
Following the rules of hygiene in handling food items is the best approach to ensure healthy food and life. How?

Question 6.
Give example of behavioural and mental processes that prove their importance in human development

Question 7.
The education given to disabled children should be such that which enables them to be independent. How can this be ensured?

Question 8.
Write four disadvantages of a situation where a 6 years old girl is taking care of her younger sibling.

Question 9.
There is considerable difference between Direct and Indirect income. Explain this distinction by giving an example of each.

Question 10.
Babita is a house wife. She wants to save fuel by meal planning. Suggest her some ways of doing this.

Question 11.
List two characteristics of blended polyesters that make them suitable for rainy season.

Question 12.
Mention four advantages of opening a recurring deposit account for two years.

Question 13.
Audio-visual methods play a prominent role educating the handicapped children. State how?

Question 14.
Your friend wants to invest some money for his higher education. Suggest ways of investment in which he can get money back after six years. Write three advantages of any two schemes.

Question 15.
Identify the standardisation marks given in the following pictures.

Question 16.
With growing age, some physical changes also take place in the body of males. What are the physical changes that are observed in male adolescents?

Question 17.
What is cholera? Give some points to prevent the spread of cholera.

Question 18.
The rights of consumers enable them to fight against the exploitation and seek legal remedies. Give an analysis of the statement by relating some rights of the consumers.

Question 19.
Write the procedure for removing any two of the following stains.
(i) Ink stain from white cotton
(ii) Tea stain from coloured cotton
(iii) Blood stain from synthetics
(iv) An unknown stain

Question 20.
Riyani, a 16 years old girl, tried to commit suicide due to her failure in board exams for last two years. Recognise the state Riyani is undergoing. Define it in short and write its four common symptoms.

Question 21.
What is the difference between soaps and detergents?

Question 22.
Plan a day’s menu for an adult suffering from diarrhoea. Also make a list of practical considerations that you will keep in mind before planning the menu.

Question 23.
Specify ten qualities of workmanship you would consider while buying a readymade shirt for your brother.

Question 24.
How knowledge and skills acquired in child care can help in supplementing the family income? Briefly explain any two ways.

Question 25.
Certain chemicals are used for the purification of water. Given below are some chemicals which are used for the same purpose. Explain them in short.
(i) Chlorine
(ii) Bleaching Powder

Answers.

Answer 1.
Meal planning is the planning of meals for all the members of the family in order to provide nutritious food on time according to their need and choice.

Answer 2.
Diet therapy is the adaptation of the basic diet to meet particular needs due to illness and other specific conditions.

Answer 3.
FPO mark specifies the minimum standards that must be maintained throughout the production powers such as manufacturing, processing etc. A product that does not bear this mark cannot give assurance of quality.

Answer 4.
Points to be considered for storing a woollen sweater are as follows

• It should be dry cleaned before storing,
• Putinsect repellents in cupboards.

Answer 5.
Unhygienic handling of food makes it contaminated and causes diseases. The safe handling of food items keeps it safe and free from all the contaminants.

Answer 6.
Behavioural activities such as reading which is directly observable and mental process involving thoughts, emotion and motive play a prominent role in human development.

Answer 7.
The most important thing to remember in teaching disabled children is to help them to learn maximum while at the same time encouraging their sense of independence and accomplishment. This enables them to be independent.

Answer 8.
The four disadvantages arising out of such a situation are given below

1. She is not equipped with skills required for usual child rearing.
2. She is not mature enough to care for the young one.
3. She might become a school drop-out.
4. In case of emergency, she cannot meet the requirements of first-aid.

Answer 9.
The difference between the direct and indirect income is as follows

Answer 10.
Babita can save the fuel by meal planning in the following ways :

• She should cook food having simple recipes and avoid lengthy cooking procedure.
• Make maximum use of pressure cooker, which conserves a lot of fuel.

Answer 11.
The blended polyesters viz terrycot or terry silk are most suitable for rainy season due to the following reasons

• Polyester or terrylene clothes dry easily and fast.
• This type of clothes are easy to maintain and remain wrinkle free.

Answer 12.
There are many advantages of opening a recurring deposit account. Four of them are given below

1. It is a safe scheme.
2. It gives higher interest than saving accounts.
3. It develops the habit of regular savings.
4. Money can grow by adding small installments.

Answer 13.
Audio-visual aids help the handicapped children to overcome their limitations to some extent as a blind child can learn by hearing sounds or by touching things.

Answer 14.
He can invest in

1. NSC (National Savings Certificate)
2. KVP (Kisan Vikas Patra)
3. UC (Life Insurance Corporation)
4. Fixed Deposit
5. IDBI, ICICI
6. Money income schemes of post-office

Three advantages of two schemes are as given below

1. Money Income Schemes of Post-office
   • Interest rate is high.
   • Loan can be taken against it.
   • No limit on investment.
2. LIC (Life Insurance Corporation)
   • It gives loan facility.
   • It provides future security.
   • Its income is tax rebate.

Answer 15.

1. ISI is a certification mark given by Bureau of Indian Standards (BIS). Indian Standard Institution ISI mark is given to Electrical goods, soaps, gas stove, powder, common salt, biscuits, mineral water, baking powder, milk powder etc. ISI develops consciousness among manufacturers and encourages them to produce quality products.
2. AG MARK This was set-up by Directorate of Marketing and Inspection of the Government of India. It establishes norms for agricultural and live stock products at natural and processed stages. AGMARK is given to Ghee, butter, oil, wheat flour, rice, jaggery, honey, spices, eggs, fruits, potatoes etc.

Answer 16.
Physical changes that are observed in male adolescents with growing age are given below

1. Skin becomes oily, sometimes with pimples acne. ‘
2. Hair grow under arms, legs, chest and face.
3. Muscles in legs and arms get bigger and stronger.
4. Shoulders and chest start to broaden.
5. Hands, feet, arms and legs become larger.
6. Voice cracks and then deepens.
7. Perspiration increases and body odour may appear.
8. Ejaculation occurs during sexual climax.

Answer 17.
Cholera It is a highly infectious disease. The digestive system of the person is affected due to this disease. People who ignore hygienic practices are more prone to this disease. If not treated properly, its mortality rate can go upto 70 per cent. It spreads mostly in summer. People of any age can lay up with this disease.
Precautions There are some points which should be followed to prevent this disease

1. Give boiled water to the patient.
2. Isolate the patient as it helps to prevent the spread of disease.
3. The room and washroom of the patient should be properly cleaned with disinfectant.
4. The food of the patient should always be covered.

Answer 18.
The various rights given to consumers serve as tools in their hands to enable them to fight against exploitation and seek legal remedies. These rights widen the scope of consumer protection. A brief description of various acts will give a better understanding of the above statement.
The description are as follows

1. The Right to Safety This refers to protection against marketing of products and services that are harmful to life and property.
2. The Right to Choose or Right to be Assured This gives the right to consumers to attain goods and services of good quality at reasonable prices.
3. The Right to be Heard It ensures that consumer’s interests will get due consideration.
4. The Right to Redressed This right ensures the right to a fair settlement and compensation.
5. The Right to Consumer Education It enables a consumer to acquire knowledge and abilities to make wise decisions.
6. The Right to Information It provides information related to different aspects of goods and services.

Answer 19.

1. Ink stain from white Cotton
   • Rub the stain with lemon or tomato juice and salt or rub the stain with sour curd.
   • Rinse well.
   • Dry in sun.
2. Tea stain from coloured Cotton
   • Soak in liquid detergent overnight and pour boiling water on the stain.
   • Wash in normal way.
3. Blood stain from synthetic
   • Soak in cold water and wash with mild ammonia.
   • Rinse properly and dry in sun.
4. An unknown stain
   • Soak the stain in warm soapy water.
   • Use bleach on stain exposing it to sunlight.
   • Treat the stain with diluted acid.
   • Wash properly

Answer 20.
Riyani is undergoing depression. It is the state of feeling low and aversion to activity. It creates a constant feeling of sadness and lack of interest. Depressed adolescents feel sad, anxious, hopeless, worthless, guilt and hurt. They face difficulty in decision-making and concentrating. They feel, life is not worth living.
Some common symptoms of depression are mentioned below
(i) Constant feeling of sadness and emptiness.
(ii) Lost of interest in activities and hobbies.
(iii) Adolescents feel hopeless and restless and become pessimistic.
(iv) Energy level becomes low and adolescent feels fatigue

Answer 21.
Soap Soap is made by mixing fats and alkalis. Both vegetable and animal fats are used. Paraffin oil is also added to enhance its quality. This is available in the form of cakes, powder, flakes, jelly etc.
Detergents A large variety of detergents are available in the market these days. Washing is comparatively easy with detergents. These can be used both in cold and warm water.
Difference between Soaps and Detergents

Answer 22.
Practical Considerations

1. Select food which is easy to digest.
2. Avoid fried, spicy and irritating foods.
3. Serve food which can be easily managed by the patient on bed.
4. Serve small portions at regular time intervals.
5. Serve attractive meals to boost up the appetite.
6. Serve freshly prepared food.
7. Provide enough liquids, specially water to avoid dehydration.
8. Avoid fibre rich foods.
9. Foods containing vinegar and mustard oil should be avoided.
10. Avoid foods which are either too hot or too cold.

Diet Plan

Answer 23.
While buying a readymade shirt, following points should be considered

1. Buttons and Button Holes Metallic or plastic buttons should be attached and well secured. Extra button should also be provided. The size of the button hole should be according to the size of button. Button holes may be machine made or bound horizontal or vertical.
2. Seams It should be either plain finished with interlocking or French seam. Stitches of seams
   should be small, equal and straight. The thread used in stitching should match the colour of the shirt. It should also be durable.
3. Collars The size of the collars should be appropriate. They should be neatly stitched. They should be stiff and not limping.
4. Placket It should be of uniform thickness and they should be neatly stitched. Length of the placket should also be adequate.
5. Matching Stitches It should be smooth, neat and continuous. Matching coloured and strong thread should be used.
6. Design If the cloth has design or pattern, then care should be taken that the print is uniform, stripes and checks are stitched at proper angles.
7. Hemming Stitches of hemming should be at short intervals and equal in size, the ends should be properly locked to avoid opening of seams, thread should be of fast colour and there should be margin for alterations.
8. Fashion Ensure that the shirt is of the latest fashion. It should match the lifestyle. But it should not be followed blindly.
9. Size It is essential to know the size of the garment before purchasing it. Readymade garments have different sizes. Gent’s shirts have chest size-40”, 42”, 46”.
10. Comfort The comfort of the shirt should be ensured while standing, sitting, walking etc. There , should not be any stiffness and looseness.

Answer 24.
Knowledge and skills acquired in the child care can help in supplementing the family income by following ways

1. It helps to get employment in any care-centre.
2. It helps to get employment in nursery school or Anganwadi.
3. It helps in opening a play school or nursery school.
4. It helps in opening creche or day care.
5. It gives guidance in counselling of children.
6. It gives skills in providing guidance related to all over child care in terms of his developmental, psychological and nutritional needs.

Following are the two ways to supplement family income through these skills
Creche/Pre-Nursery School Start a good business proposition with the help of this knowledge.
Social Welfare Programme Like ICDS, this also provides employment opportunities to the students of Home Science.

Answer 25.

• Chlorine Use of chlorine is the most reliable method to purify the water. It is the cheapest, effective and simple method. This method is used to purify the large quantity of water like water tanks.
  It destroys bacteria in water but does not remove the suspended impurities. Water is filtered before chlorination. Now-a-days, chlorine tablets are also available in the markets which are used only to disinfect water at home. One tablet is added to 10 litres of water and is kept for 25-30 minute and is then filtered. These tablets are also used by travellers and military campers.
• Bleaching Powder It is also used in order to purify the water. When bleaching powder is added to the water, a chemical reaction takes place and thus, chlorine gas is produced. This chlorine gas is used to purify the water.
  Amount of bleaching powder should be adder) in water according to the amount of impurities in water. Generally, 30 gm of bleaching powder is added to 10 gallons of water for purifying it. Use of bleaching powder is also an easy and effective method of purifying water.

We hope the CBSE Sample Papers for Class 12 Home Science Paper 2 help you. If you have any query regarding CBSE Sample Papers for Class 12 Home Science Paper 2, drop a comment below and we will get back to you at the earliest.

CBSE Sample Papers for Class 12 Informatics Practices Paper 4 are part of CBSE Sample Papers for Class 12 Informatics Practices. Here we have given CBSE Sample Papers for Class 12 Informatics Practices Paper 4.

CBSE Sample Papers for Class 12 Informatics Practices Paper 4

Students who are going to appear for CBSE Class 12 Examinations are advised to practice the CBSE sample papers given here which is designed as per the latest Syllabus and marking scheme, as prescribed by the CBSE, is given here. Paper 4 of Solved CBSE Sample Paper for Class 12 Informatics Practices is given below with free PDF download solutions.

Time : 3 hrs
Maximum Marks : 70

General Instructions

• All questions are compulsory.
• Answer the’questions after carefully reading the text.

QUESTIONS

Question 1.
(a) There is a numbered address (four parts separated by periods) that identifies a Website uniquely. What is it?
(b) Name any of the two encodings used for Indian computing language.
(c) Two students in the same room have connected their laptop using bluetooth for working on a seminar presentation. Out of the following, what kind of network they have formed? LAN, MAN, PAN, WAN.
(d) Ketan has set-up a network of computers. Now, he wants to prevent unwanted networking connections according to some filtering/blocking rules. Suggest him the solution.
(e) Write the name of the following:
(i) It is a protocol/technology used to exchange files on Internet.
(ii) It provides a set of rules to transfer files, videos, images etc., over the World Wide Web.
(f) What do you understand by network security? Name any two common threats to it.
(g) Differentiate between star topology and bus topology of network.

Question 2.
(a) What would you write in Exit button’s Action Performed method, if you want to end the execution of your Java GUI application?
(b) In the code fragment given below, what happens when choice equals to 5?

int n = 0, m = 0 ;
int choice = Integer.parselnt (args[0]) ; 
if (choice == 1)
{
n = 11 ; 
m = 10 ;
}
else if (choice == 2)
{
n = 20 ; 
m = 220 ;
}
j OptionPane.showMessageDialog(this,"n=" + n +, "m=" + m) ;

(c) Write a Java method that takes three digits integer as parameter and returns its middle digit.

(d) Predict the output of the following HTML code :

<UL>
<LI> A few new Students: </LI>
<UL type="Square">
<LI> Sohan </LI>
<LI> Mohan </LI>
<LI> Rohan </LI>
</UL>
</UL>

(e) (i) Rewrite the following code using switch case statement :

if (value==l)
j TextFieldl.setText( "Computer Books" ) ; 
else if(value==2)
j TextFieldl.setText( "English Books" ) ; 
else if(value==3)
j TextFieldl.setText ( "GS Books" ) ; 
else
j TextFieldl.setText ( "Wrong Choice" ) ;

(ii) Write HTML tag to do the following:
I. Insert the picture in the Web page.
II. Insert the empty line in the Web page.

Question 3.
(a) Identify the output of the following code:

SELECT LCASE ("COMPUTER SCIENCE") ;

(b) Which keyword eliminates the redundant data from a query result?
(c) Consider the table :

Identify error(s) in the following SQL statement. Rewrite the correct SQL statement.

SELECT Empid AS Total_emp, AVG(Total_Salary) AMOUNT FROM SALARY;

(d) Write SQL queries for the following:
(i) Add a NOT NULL constraint in table EMP1 in which a column Designation is declared as NULL.
(ii) Drop the table EMP1.

(e) Given below is the 'TRAIN' table :

(i) SET AUTOCOMMIT = 1 ;
INSERT INTO TRAIN VALUES ('T03', 'Goa') ;
ROLLBACK ;
SELECT * FROM TRAIN ;

(ii) SET AUTOCOMMIT = 0 ;
INSERT INTO TRAIN VALUES ( 'T03' .'Goa’) ;
COMMIT;
INSERT INTO TRAIN VALUES ( 'T04’ '. 'RAJASTHAN’) ;
ROLLBACK ;
SELECT * FROM TRAIN ;

Is both query output is same if yes, state the reason?

Question 4.
(a) In a SWITCH statement, what is the purpose of ‘default’ section?
(b) (i) Find the output of the following Java code snippet :

String word = "Highrise" ;
String wordl c = word.toLowerCase ( ) ; 
for ( int i = 0 ; i<wordlc.length ( ) ; i +=4)
{
String extstr=wordlc.substring (i, i+2) ; 
j TextAreal.append!extstr+''\n") ;
}

(ii) Write the value that will be stored in variable num after execution of following code and also define working:

int num=0 ;
for ( int j=9 ; j>=6 ; j- -)
{
if (j%3==0) 
num=num+j ; 
else
num = num - j ;
}

(c) (i) The following code has some error(s). Rewrite the correct code underlining all the corrections made :

int i ;
i=10 ; 
do;
i=i-4;
System.out.displayin ( i ) ;
Iwhile i>=4 ;

(ii) Write a Java code to find out whether a year is a leap year or not.
(d) Ravi is a programmer at Arora Book Store. He created the following GUI in NetBeans. Help him in writing code for the following :

(i) Write the code for [Calculate Price] button. Total price should be displayed in jTextField5 on clicking the CommandButton1.
(ii) To clear all the text field on clicking of [Reset] button.
(iii) To terminate the application on the click of [Exit] button.
[Assume suitable names for the various controls on the Form].

Question 5.
(a) Mr. Khanna wants to remove all the rows from STOCK table to release the storage space, but he does not want to remove the structure of the table. What MYSQL statement should be used?
(b) Consider the following two tables :

Give output of the following query :

SELECT CLASSES.Class_Name, SUBJECTS.Sub_Name
FROM CLASSES. SUBJECTS
WHERE CLASSES.S_No = SUBJECTS.S_No ;

(c) (i) What are the properties of transactions maintained by database system?
(ii) Write the output of the following SQL queries :

I. SELECT SUBSTRC EASYCALCULATION', 5,11) AS String ;
II. SELECT CHAR(77, 121, 83, 81, 76) AS V;

(d) Table “LAB” is shown below. Write commands in SQL for (i) and (ii) and output for (iii) and (iv).

(i) Display the SurName, Fname and City of LAB students residing in New Delhi city.
(ii) Display the LAB Sid, City and Pincode of students in descending order of Pincode.

(iii) SELECT SurName FROM LAB WHERE Fee>=20000 ;
(iv) SELECT SUM(Fee) FROM LAB WHERE Gender = 'F' ;

Question 6.
(a) (i) Write SQL query to create a table ‘BANK’ with following structure :

(ii) Consider the tables TEACHER and SUBJECT given below :

I. Which column is used to relate both tables?
II. Is it possible to have a primary key and foreign key both in one table? Justify your answer with the help of tables given above.

(b) With reference to the above given tables (in Q6 (a)(ii)), write commands In SQL for (j) and. (ii) and output for (iii) below :

(i) To display Teacher ID, Naine of lèachei Subject Name, Contact Number of Teachers whose qualification is MCA.
(ii) lb display Teacher ID, Teacher Name, Subject ID, Subjects of all teachers with subject name starting with ‘S’. . .

(iii) SELECT T.TID,T.TName, T.TCity, S.SID,S.SName
FROM TEACHER T, SUBJECT S
WHERE T.TID = S.TID AND S.Fee BETWEEN 500 AND 875 ;

Question 7.
(a) How does E-Business improve customer satisfaction?
(b) Write down advantages of E-Govemance over society
(c) Ram works for the customer support executive. He wishes to create controls on a form for the following functions. Choose appropriate controls from TextBox, Label, RadioButton, CheckBox, ListBox, ComboBox, CommandButton and write in third column.

ANSWERS

Answer 1.
(a) IP address
(b) Two encodings used for Indian computing language are as follows:
(i) UNICODE (Universal Code)
(ii) ISCII (Indian Standard Code for Information Interchange).
(c) PAN
(d) The suggested solution for him to given problem is Firewall.
(e) (i) FTP (File Transfer Protocol) (ii) HTTP (HyperText Transfer Protocol)
(f) Network security refers to the provisions and policies adopted by the administrators to protect data during data transmission and to guarantee that these transmissions are authentic.
Two common threats to network security are as follows: (i) Trojan Horses (ii) Worms
(g) Differences between star topology and bus topology are as follows :

Answer 2.

(a) System.exit (0) ;

(b) The message dialog will show the value as n = 0, m = 0.

(c) private int retMid (int num)
{
int a = num%100 ;
int b = a/10 ;
return b ;
}

(d) Output

• A few new Students :
• Sohan « Mohan
• Rohan

(e) (i) switch (value)
{
case 1: j TextFieldl.setText ( "Computer Books" ) ;
break;
case 2: j TextFieldl.setText ( "English Books" ) ;
break;
case 3: j TextFieldl.setText ( "GS Books") ;
break;
default: j TextFieldl.setText ( "Wrong Choice" ) ;
}
(ii) I. <IMG> tag II. <BR> tag

Answer 3.

(b) DISTINCT keyword eliminates the redundant data from a query result.
(c) The correct code is :

SELECT COUNT (Empid) AS Total_emp, AVG (Total_Salary) AS AMOUNT FROM SALARY :

(d) (i) ALTER TABLE EMP1 MODIFY Designation CHAR!2) NOT NULL ;
(ii) DROP TABLE EMP1 ;

Yes, both queries output is same because in (ii) query AUTOCOMMIT is 0. When AUTOCOMMIT is OFF, all transaction control commands will be affect and when AUTOCOMMIT mode is 1 it commits and terminates the current transaction.

Answer 4.
(a) In a SWITCH statement, the default section will be executed when no match is found with switch expression to case constant value.
(b)

(i) hi
ri
(ii) Working :
iteration 1 : j=9. 9>=6 True
if (9%3==0) True
num=0+9=9
iteration 2 : j=8, 8>=6 True
if(8%3==0) False
num=9-8=1
iteration 3 : j=7, 7>=6 True
if(7%3==0) False
num=1 - 7=-6
iteration 4: j=6, 6>=6 True
if(6%3==0) True
num= -6+6=0
iteration 5: j=5, 5>=6 False

Output
0 will be stored in num.

(c) (i) The correct code is

int i ;
i=10 ;
d0
i=i -4;
System.out.println ( i ) :
}while (i>=4) ;

(ii) if (year%4==0)
System.out.println(year+"is a leap year") ; 
else
System.out.println(year+"is not a leap year") ;

(d) For 1st button, we have to specify the following code :

(i) private void jButtonlActionPerformed(java.awt.event.ActionEvent evt)
{
float price, total ; 
int rioc ;
price = Float.parseFloat (j TextField3.getText ( ) ) ;
noc = Integer.parselnt (j TextField4.getText ( ) ) ; 
total = price * noc ;
j TextField5.setText (Float.toString(total) ) ;

(ii) For 2nd button, we have to specify the following code :

private void jButton2ActionPerformed(java.awt.event.ActionEvent evt)
{
j TextField1.setText(” ") ; 
j TextField2.setText(" ") ; 
j TextField3.setText(" ") ; 
j TextField4.setText(" ") ; 
j TextField5.setText(" ") ;
}

(iii) For 3rd button, we have to specify the following code :

private void jButton3ActionPerformed(java.awt.event.ActionEvent evt)
{
System.exit (0) ;
}

Answer 5.
(a) The command to delete all rows from the STOCK table without deleting the structure of the table will be as follows :

DELETE FROM STOCK ;

(c) (i) Properties of transactions maintained by database system are as follows :

I. Atomicity This property ensures that either all operations of the transactions are performed in completion or none of the operations are performed and reflected in database.

II. Consistency It ensures that the database before and after the transaction is in a consistent state.

III. Isolation It ensures that each transaction executing takes place in isolation.

IV. Durability It ensures that the changes made in the database remains in it, after the successful completion of a transaction.

(d)

(i) SELECT SurName, Fname, City FROM LAB WHERE City ='New Delhi' ; 
(ii) SELECT,Sid, City, Pincode FROM LAB ORDER BY Pincode DESC ;

Answer 6.
(a)

(i) CREATE TABLE BANK
(
BankID VARCHAR(5) PRIMARY KEY,
BankName CHAR(10) NOT NULL. Location CHAR (10),
No_of_Branch INTEGER
) ;

(ii) I. TID
II. Yes, it is possible to have primary key and foreign key column in one table. Primary key column is used to uniquely identify each record of the table while foreign key column is used to maintain referential integrity.

As in the given table ‘SUBJECT’, SID column is a primary key while TID may act as a foreign key.

(b) (i) SELECT T.TID, T.TName, S.SName, T.TContact_No 
FROM TEACHER T, SUBJECT S
WHERE T.TID = S.TID AND T.TQualification = 'MCA' ;

(ii) SELECT T.TID, T.TName, S.SID, S.SName 
FROM TEACHER T,SUBJECT S 
WHERE T.TID = S.TID AND S.SName LIKE 'S%' ;

Answer 7.
(a) E-Business improves customer satisfaction by using are as follows :

1. Customers can receive highly customisable services.
2. Even remote area customers are reached in E-Business.

(b) The advantages of E-Governance over society are as follows :

1. A lot of productivity time of government servants and general public is saved.
2. Transparency has increased and therefore cheating cases have been reduced.
3. E-Governance programs have resulted in increased public participation.
4. People have also benefited from it in the form of reduced cost and availability of the services.

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