Class 12 CBSE Computer Science Answer Key 2025 (Available): Unofficial key PDF download

1.

True or False:
"A Python List must always contain all its elements of same data tye"

False

2.

What will be the output of of the following statement:
print(14%3**2*4)

3.

Identify the correct output of the following code snippet:
game-"Olympic2021"
print(game.index("C"))

ValueError

4.

Which of the following is the correct identifier?

def

5.

Identify the invalid Python statement out of the following options:

print("A",sep="*',10)

6.

['TAC','TIC']

7.

Which of the following operator evaluated to True if the variable on either side of the operator points towards the same memory location and False otherwise?

is

8.

Consider the statement given below and then choose the correct output from given option:
D={'S01':95, 'SO2':96}
for I in D:
print (I, end= '#)

9.

While creating a table, which constraint does 110 insertion of duplicate values in the table?

Unique

10.

Consider the statement given below and then choose the correct answer from the given options:
def Change(N):
N=N+10
print (N, end='$$')
N=15
Change (N)
print (N)

25$$25

11

Consider the statements given below and then choose the correct output from the given options:
N='5'
try:
print ('WORD'+N, end='#')
finally:
print ('OVER')

WORD5#OVER

12

Which of the following buit-in function/method returns a dictionary

dict()

13

Which of the following is a DML command in SQL?

UPDATE

14

Which aggregate function in SQL displayes the number of values in the specified column ignoring the NULL values?

count()

15

In MYSQL, which type of value should not be enclosed within quotation marks?

FLOAT

16

State True or False
If table A has 6 rows and 3 columns, and table B has 5 rows and 2 columns, the Cartesian product of A and B will have 30 rows and 5 columns.

False

17

Which of the following networking devices is used to regenarate and transmit the weekend signal ahead?

Repeater

18

Which of the following options is the correct protocol used for phone over the internet?

VoIP