Class 12 Computer Science - Sample Paper 1

1) State True or False:-

"In python, A line begins with symbol # is executed first"

Ans:- False

2) Which of the following is un-ordered sequence.

(a) List
(b) Dictionary
(c) String
(d) Tuple

Ans:- (b) Dictionary

3) Consider the given expression, and say which of the following will be the correct ouput of the given expression is evaluated?

73<40 or 16>13 and not 5==5 or 15>5

(a) True
(b) False
(c) None
(d) Null

Ans:- (a) True

4) In a relational model, tables are called _____, that stores data for different columns.

(a) Degree
(b) Attribute
(c) Relation
(d) Tuple

Ans:- (c) Relation

5) Choose the correct output for the following

                Mystr="Vikasit Bharat"
                print(Mystr[:3] + "#" + Mystr[-3:-6:-1])

(a) Vika#rahB
(b) Vik#arB
(c) vik#rah
(d) Vik#rah

Ans:- (d) Vik#rah

6) Which is invalid statement -

(a) print("hello"*3)
(b) print(3*5)
(c) print("hello" + str(3))
(d) print("hello" + 3)

Ans:- (d) print("hello" + 3)

7) What will be the output of the following command.

                print(6+10/10+8)

(a) 14
(b) 14.0
(c) 15
(d) 15.0

Ans:- (d) 15.0

8) The execution of below code will result?

                def abc():
                    a=10
                print(a, end="#")

(a) 10
(b) 10#
(c) a#
(d) NameError

Ans:- (d) NameError

9) Which is not a valid built in function of Dictionary?

(a) Update()
(b) items()
(c) values()
(d) index()

Ans:- (d) index()

10) Which output is not possible if below code is executed?

                import random
                S="Viksit Bharat Buildathon"
                for x in S.split():
                        i=random.randint(0,1)
                        print(x[i], end="#")

(a) V#h#u#
(b) i#B#u#
(c) V#B#B#
(d) V#i#B#

Ans:- (d) V#i#B#

11) Cardinality of a SQL table means

(a) Total rows of table
(b) Total candidate keys of table
(c) Total columns of a table
(d) None of all above

Ans:- (a) Total rows of table

12) What will be the output of below code

                def valchange(n):
                        n=n-10
                        print(n, end="#")
                n=100
                valchange(n)
                print(n)

(a) 100#90
(b) 90#90
(c) 90#100
(d) 100#100

Ans:- (c) 90#100

13) What will be the output of the following given code?

                Mesg="command"
                MyList=Mesg.split("m")
                print(MyList)

(a) ['co', '', 'and']
(b) ['co', '', '', 'and']
(c) ['co, 'and']
(d) ['co', 'm', 'and']

Ans:- (a) ['co', '', 'and']

14) What will be the output of the below code

                try:
                    a=int("ten")
                except:
                    print("wrong code", end"$")
                else:
                    print("correct code", end="$")
                finally:
                    print("ok")

(a) Wrong code$ok
(b) correct code$ok
(c) wrong code$
(d) correct code$

Ans:- (a) Wrong code$ok

15) In SQL, which command add a new record at last

(a) Update
(b) insert
(c) append
(d) alter

Ans:- (b) insert

16) Which of the following is not a DDL command

(a) create table
(b) update
(c) alter table
(d) drop table

Ans:- (b) update

17) What is standard rate of data transfer in Network

(a) Bytes per second (Bps)
(b) bits per second(bps)
(c) Kilo bits per second(Kbps)
(d) Kilo Bytes per second(KBps)

Ans:- (b) bits per second(bps)

18) Expand the term WWW _______

Ans:- World Wide Web

19) Correct name is WiFi is

(a) Wireless File
(b) Wireless Fidelity
(c) Wireless Friendly
(d) Wireless Fiction

Ans:- (b) Wireless Fidelity

20) Assertion (A): In Python, a stack can be implemented using a list. Reason (R): A stack works on the principle of First In First Out(FIFO)

Ans:- (c) A is True but R is False

21) Assertion (A): In Python-Mysql connectivity, we need to import python.mysql.connector module Reason (R): This connector module is needed for exchanging data between python and Mysql

Ans:- (a) Both A and R are true and R is the correct explanation of A.

22) Predict the output of the following command

(i)type((10))
(ii)type([10])

Ans:-(i) < class 'int'>
(ii) < class 'list'>

OR

How many times the following loop will run

Course="AI Vidaset 1.0"
for I in Course:
        if I.isalpha():
            pass
        else:
            break

Ans:-

The loop will run 7 times.

23) Identify the error in the following code and rewrite it, underlining the correction made.

def test():
    for x in range(5):
        if x%2==0:
            print(x)
        else:
            return

Ans:-

def test():
    for x in range(5):
        if x % 2 == 0:
            print(x)
        else:
            continue

24) (A) Write python code for the following statement
(i) Print the last character of a string stored into a variable MyString
(ii) Print the first occurrence of character 'e' stored into a string variable named MyName

#question (i)
MyString = "Vikasit Bharat"
print(MyString[-1])

#question (ii)
MyName = "The Developer"
try:
    index_of_e = MyName.index('e')
    print(MyName[index_of_e])
except ValueError:
    print("Character 'e' not found in MyName.")

OR

(B) Predict the output of the following code
(i) print("EK BHARAT SHRESTH BHARAT".title())
(ii) print("EK BHARAT SHRESTH BHARAT".capitalize())

OUTPUT:-
(i)Ek Bharat Shresth Bharat
(ii)Ek bharat shresth bharat

Class 12 Computer Science - Sample Question Paper 1

Section A

Section B