Class 11 CS Chapter 9 String Manipulation Solutions Sumita Arora New Syllabus

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EX 9.1 Solutions

10. Considering the same strings s1 and s2 of question 5 above, evaluate the following expressions :

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9. What do you understand by string slices ?

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7. On what principles, the strings are compared in Python ?

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8. What will be the result of following expressions ?

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6. What are membership operators? What do they basically do ?

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5. Given that s1 = “spam”, s2 = “ni!” What is the output produced by following expressions ?

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4. For strings, + means ( 1 ) ; * means (2) . Suggest words for positions (1) and (2).

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3. The last character of a string s is at index len(s) – 1 . True / False ?

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2. For a string s storing ‘Goldy’, what would s[0] and s[-l] return ?

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1. How are strings internally stored ?

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EX 9.2 Solutions

5. How is capitalize( ) function different from upper( ) function ?

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4. What is the utility of find( ) function ?

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2. How is islower() function different from lower() function ?

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2. Name the case related string manipulation functions.

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1. What is the role of these functions ?

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Back Exercise Part A

10. Try to find out if for any case, the string functions isalnum( ) and isalpha( ) return the same result.

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11. Suggest appropriate functions for the following tasks :

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9. Which functions would you choose to use to remove leading and trailing white spaces from a given string ?

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8. What would following expression return ?

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7. From the string S = “CARPE DIEM”, which ranges return “DIE” and “CAR” ?

'DIE' is ...

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5. Can you say strings are character lists ? Why ? Why not ?

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6. Given a string S = “CARPE DIEM”. If n is length/2 (length is the length of the given string), then what would following return ?

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4. Which of the following is not a Python legal string operation ?

Ans: (d) ...

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2 . Out of the following operators, which ones can be used with strings ?

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3. What is the result of following statement, if the input is ‘Fun’ ?

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1. Write a Python script that traverses through an input string and prints its characters in different lines- two characters per line.

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Back Exercise Part B

8. Find the errors

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6. Carefully go through the code given below and answer the questions based on it :

(i) (b) ...

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7. Find the output :

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5. Carefully go through the code given below and answer the questions based on it :

(i) (a) ...

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3. Carefully go through the code given below and answer the questions based on it :

(i) (a) ...

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4. Carefully go through the code given below and answer the questions based on it :

(i) (c) ...

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1. What is the result of the following expressions ?

(a) (b) ...

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2. What will be the output produced by following code fragments ?

(a) (b) ...

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Back Exercise Part C

1. Write a program that prompts for a phone number of 10 digits and two dashes, with dashes after the area code and the next three numbers. For example, 017-555-1212 is a legal input. Display if the phone number entered is valid format or not and display if the phone number is valid and not (i.e., contains just the digits and dash at specific places.

# Code ...

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3. Write a program that should prompt the user to type some sentence(s) followed by “enter”. It should then print the original sentence(s) and the following statistics relating to the sentence(s) :

* Number ...

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2. Write a program that:

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4. Write a Python program as per specifications given below :

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5. Write a program that does the following :

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7. Write a program to convert a given number into equivalent Roman number (store its value as a string). You can use following guidelines to develop solution for it :

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6. On what principles does Python compare two strings ? Write a program that takes two strings from the user and displays the smaller string in single line and the larger string as per this format :

1st letter ...

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