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(Download) CBSE Class-12 Sample Paper 2020-21:Computer Science

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(Download) CBSE Class-12 Sample Paper 2020-21 :Computer Science



Class: XII Session: 2020-21

Computer Science (083) S

ample Question Paper (Theory)

Maximum Marks: 70                                                                                    Time Allowed: 3 hours

General Instructions:

1.  This question paper contains two parts A and B. Each part is compulsory.

2.  Both Part A and Part B have choices.

3.  Part-A has 2 sections:

a.  Section – I is short answer questions, to be answered in one word or one line.

b.  Section – II has two case studies questions. Each case study has 4 case-based sub- parts. An examinee is to attempt any 4 out of the 5 subparts.
4.  Part - B is Descriptive Paper.

5.  Part- B has three sections

a. Section-I is  short answer questions of 2 marks each in which two question have internal options.
b. Section-II is long answer questions of 3 marks each in which two questions have internal options.
c.  Section-III is very long answer questions of 5 marks each in which  one question has internal option.
6.  All programming questions are to be answered using Python Language only

Question

 

No.

Part-A

Marks

 

allocated

 

Section-I

 

Select the most appropriate option out of the options given for each question. Attempt any 15 questions from question no 1 to 21.

 

1

Find the invalid identifier from the following

 

a)   MyName     b) True    c) 2ndName      d) My_Name

1

2

Given the lists L=[1,3,6,82,5,7,11,92] , write the output of print(L[2:5])

1

3

Write the full form of CSV.

1

4

Identify the valid arithmetic operator in Python from the following.

 

a)  ?             b) <            c) **         d) and

1

 

 

 

5

Suppose a tuple T is declared as T = (10, 12, 43, 39), which of the following is

 

incorrect?

 

a) print(T[1])

 

b) T[2] = -29

 

c) print(max(T))

 

d) print(len(T))

1

6

Write a statement in Python to declare a dictionary whose keys are 1, 2, 3

 

and values are Monday, Tuesday and Wednesday respectively.

1

7

A tuple is declared as

 

T = (2,5,6,9,8)

 

What will be the value of sum(T)?

1

8

Name the built-in mathematical function / method that is used to return an absolute value of a number.

1

9

Name the protocol that is used to send emails.

1

10

Your friend Ranjana complaints that somebody has created a fake profile on

 

Facebook and defaming her character with abusive comments and pictures. Identify the type of cybercrime for these situations.

1

11

In SQL, name the clause that is used to display the tuples in ascending order

 

of an attribute.

1

12

In SQL, what is the use of IS NULL operator?

1

13

Write any one aggregate function used in SQL.

1

14

Which of the following is a DDL command?

 

a)   SELECT   b) ALTER    c) INSERT    d) UPDATE

1

15

Name The transmission media best suitable for connecting to hilly areas.

1

16

Identify the valid declaration of L:

 

L = [‘Mon’, ‘23’, ‘hello’, ’60.5’]

1

 

 


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