Page 332 - Computer Science V2.0 Class 11

06 print('digit') #s2
07 if ch.isupper():
08 print('upper') #s3
09 else:
10 print('Unknown') #s4
11 countMessage('BijoyGhosh1@gmail.com')
Ans. (#s1, #s2, #s3, #s4:18, 1, 2, 19)

17. What will be the output produced on execution of the following code snippet?
for i in range(1,15,4):
print(i+i//2, end=', ')
Ans. 1, 7, 13, 19,

Assertion and Reasoning Based Questions

The following questions are assertion(A) and reasoning(R) based. Mark the correct choice as
a. Both A and R are true and R is the correct explanation of A
b. Both A and R are true and R is not the correct explanation of A
c. A is true but R is false
d. A is false but R is true
1. Assertion (A): An infinite loop never terminates.
Reasoning (R): A loop executes a set of statements repeatedly till the test condition is True.
2. Assertion(A): Both for and while loops are iterative statements.
Reasoning(R): The repeated execution of statements in a program is called iteration.

3. Assertion(A): else clause is optional in for loop.
Reasoning(R): The number of times a for loop with a range clause will execute will depend on the values returned by the
range().
Ans. 1. a 2. b 3. b

Case-based Questions

1. Pushpreet has a deep interest in Mathematics and is also inclined towards computing skills. He wants to write a program in
Python that computes and displays the sum of the following series for an arbitrary n (he will provide the value of n when
the program is executed):
sum = 1 + (1 + 2) + (1 + 2 + 3) + (1 + 2 + 3 + 4) + (1 + 2 + 3 + 4 + …+n)
Write a program for Pushpreet to complete the given task.

Ans. def sumSeries(num):
'''
Objective: To compute the sum of first n terms of the series
Input Parameters: num - numeric value
Return Value: total - numeric value
'''
total = 0
for i in range(2, num+2):
term = 0
for j in range(1, i):
term += j
318 Touchpad Computer Science (Ver. 2.0)-XI