Please refer to Important Questions String Manipulation Class 11 Informatics Practices below. These questions and answers have been prepared based on the latest examination guidelines and NCERT book issued for Class 11 Informatics Practices for the current academic year. We have provided Important Questions for Class 11 Informatics Practices for all chapters here. String Manipulation is an important chapter in Class 11 Informatics Practices, following Important Questions and their solutions will help you to get more marks in examinations.
String Manipulation Class 11 Informatics Practices Important Questions
Very Short Answer Type Questions
Q.1 Which of the following is not a Python legal string operation?
(a)‟abc‟+‟abc‟ (b) „abc‟*3 (c)‟abc‟ + 3 (d)‟abc‟.lower()
Ans: (c) „abc‟ + 3
Q.2 Out of the following operators, which ones can be used with strings?
=, -, *, /, //, %, >, <>, in, not in, <=
Ans: /, // and %
Q.3 From the string S = “CARPE DIEM”. Which ranges return “DIE” and “CAR”?
Ans: S[6:9] for “DIE” and S[0:3] for “CAR”
Q.4 Given a string S = “CARPE DIEM”. If n is length/2 then what would following return?
(a) S[:n] (b) S[n:] (c) S[n:n] (d) S[1:n] (e) S[n:length-1]
Ans: (a) “CARPE” (b) “DIEM” (c) „ ‟ (d) “ARPE” (e) “DIE”
Q.5 What would following expression return?
(a) ”Hello World”.upper().lower()
(b) ”Hello World”.lower().upper()
(c) ”Hello World”.find(“Wor”,1,6)
(d) ”Hello World”.find(“Wor”)
(e) ”Hello World”.find(“wor”)
(f) ”Hello World”.isalpha()
(g) ”Hello World”.isalnum()
(h) ”Hello World”.isdigit()
Ans: (a) ‘hello world’
(b) ‘HELLO WORLD’
Short Answer Type Questions
Q.1 What is a string slice? How is it useful?
Ans: String Slice is a part of a string containing some contiguous characters from the string. It is accessed from the string by providing a range in “[ ]” brackets i.e. S [n:m]. Python returns all the characters at indices n, n+1, n+2 . . . m-1 e.g. „Barabanki‟.[4:7] will return „ban‟.
Q.2 Write a python script that traverses through an input string and prints its characters in different lines – two characters per line.
Q.3 Which functions would you chose to use to remove leading and trailing white spaces from a given string?
Ans: Python String strip() function will remove leading and trailing whitespaces. If you want to remove only leading or trailing spaces, use lstrip() or rstrip() function instead.
Q.4 Suggest appropriate functions for the following tasks –
(a) To check whether the string contains digits.
(b) To find the occurrence a string within another string.
(c) To convert the first letter of a string to upper case.
(d) To convert all the letters of a string to upper case.
(e) To check whether all the letters of the string are in capital letters.
(f) to remove all the white spaces from the beginning of a string.
Ans: (a) isalnum()
Q.5 Find the errors –
Print(s + s[9:15])
Ans: Here the error is : Sting index out of range.
Skill Based Questions