11 Class Computer Science Final Exam 2025-26: St. Margaret School, Rohini, New Delhi

L1 = [1,2] L2 = [3,4] (L1 + L2) * 2

(a) [2,4,6,8] (b) [1,2,3,4,1,2,3,4] (c) [1,3,4,4] (d) [3,4,1,2]

a = 3
while a < 20:
print(“*”)
a += 1

(a) 16   (b) 17   (c) 18   (d) 20

abc = “6/4”
print(“abc”)

Dict1 = {‘Tuple’:’immutable’, ‘List’:’mutable’, ‘Dictionary’:’mutable’, ‘String’:’immutable’}

Identify the statement that will delete key:value pair for key=’Dictionary’:
(a) del Dict1[‘Dictionary’] (b) Dict1[‘Dictionary’].delete()
(c) delete(Dict1[“Dictionary”])
(d) del(Dict1[‘Dictionary’]):

t1 = (4,2,3,4,5,6)
print(t1.index(4))

(a) 4   (b) 5   (c) 6   (d) 0

Str = “KENDRIYA VIDYALAYA SANGATHAN JAMMU REGION”
Str = Str.split()
NewStr = Str[0] + “#” + Str[1] + “#” + Str[4] print(NewStr)

(a) KENDRIYA#VIDYALAYA#SANGATHAN#JAMMU
(b) KENDRIYA#VIDYALAYA#REGION
(c) KENDRIYA#VIDYALAYA#SANGATHAN
(d) KENDRIYA#VIDYALAYA#

print(‘INDIA’.capitalize())

(a) Both A and R are true and R is correct explanation
(b) Both A and R are true but R is not correct explanation
(c) A is true but R is false
(d) A is false but R is true

S1 = ‘CoMPuter SciENce’
S1[0] = S1[0].lower()

Assertion (A): Above code will generate error.
Reason (R): String is mutable by nature.

N = 100
A = “Number” + 5
B = 2N + 20
Print(B)

(a) Write the most appropriate list method:
(i) Delete a given element from the list
(ii) Add an element at the beginning of the list

(b) Predict the output:
my_list = [‘p’,’r’,’o’,’b’,’l’,’e’,’m’] my_list[3:6] = [] print(my_list)

fruits = [“apple”, “mango”, “banana”, “cherry”] for x in fruits:
if(len(x) > 5):
print(x)

(a) a = [12,14,16,18,10] print(a[-1:1:-2])

(b) d = {‘Name’:’Ravi’, ‘Marks’:90}
e = {‘Age’:16, ‘Marks’:95}
d.update(e)
print(d)

b) Who is doing Ethical Hacking – Person 1 or Person 2? Justify your answer.

c) Person 2 was using Key Logger software in his computer. What is it?

Example:
Input: 526
Reverse: 625
Output: 1250

Dictionary:
{‘Henil’:78, ‘Kartvya’:82, ‘Avee’:93, ‘Dhruvin’:88, ‘Shaan’:94}

(b) Write statements to create a blank dictionary and blank list.

(b) Given:
s1 = “Strings are immutable datatype”
print(s1[::-2])
print(s1[::2])
print(s1[:2])

(b) Write a Python program to shift elements of list to left by n positions.

Example:
Arr = [10,20,30,40,12,11] n = 2
Output: [30,40,12,11,10,20]

(a) Why should firewall be used? What is firewall?

(b) What are different ways to protect your system from cyber attack?

(c) What is a worm? Explain.