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12th Standard English Medium Computer Science Subject Strings and String Manipulations Creative 3 Mark Questions with Solution Part - I updated Creative Questions

Published on: 13/05/2022

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Std: 12th Standard - Computer Science

chapter: - Creative Questions

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Questions:

Generic 3

5 x 3 = 15

With an example program explain about membership operators?

Write a note on
(i) isalnum ()
(ii) isalpha ()
(iii) isdigit ()

Write the output of the following statements.
(i) print (len ("Corporation"))
(ii) print ("school", Capitalize ())
(iii) print ("Welcome" center (15, '*'))

Write the usage of the following format string characters.
(i) % c
(ii) % d (or) % i
(iii) % s

Write a program to accept a string and print it in reverse order.

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Answers Key:

Generic 3

5 x 3 = 15

Membership Operators:
(i) The 'in' and 'not in' operators can be used with strings to determine whether a string is present in another string. Therefore, these operators are called as Membership Operators.
(ii) Example:
str1=input ("Enter a string:")
str2="chennai"
if str2 in str1:
print ("Found")
else:
print ("Not Found")
(iii) Output:1
Enter a string: Chennai GHSS, Saidapet
Found
(iv) Output:2
Enter a string: Govt GHSS, Ashok Nagar Not Found

	Syntax	Description	Example
(i)	isalnum ()	Returns True if the string contains only letters and digit. It returns False. If the string contains any special character like _,@,#,*,etc.	>>>str1='Save Earth' >>>str1.isalnum() False The function returns False as space is an alphanumeric character. >>>'save 1 Earth'. isalnum() True
(ii)	isalpha ()	Returns True if the string contains only letters Otherwise return False.	>>>'Click123'. isalpha() False >>>'python'.isalpha() True
(iii)	isdigit ()	Returns True if the string contains only numbers. Otherwise it returns False	>>>str1='Save Earth' >>>print(str1.isdigit())

(i) 11
(ii) School
(iii) * * * * Welcome * * * *

(i) character
(ii) Signed decimal integer
(iii) String

str1 = input ("Enter a string:")
Index=-1
while index >= -(lentstrl1)):
print ("Subscript[",index,"] :" + str1 [index])
index +=-1
Output:
Enter a string: welcome
Subscript [ -1 ] : e
Subscript [ -2 ] : m
Subscript [ -3 ] : 0
Subscript [ -4 ] : c
Subscript [ -5 ] : I
Subscript [ -6 ] : e
Subscript [ -7 ] : w