Strings in Programming Principles: Master String Manipulation

Question 1

Which Python function converts a string to all lowercase characters?

Accepted Answer

lower()

Answer

upper()

Answer

title()

Answer

capitalize()

Question 2

Which of the following is NOT a string manipulation function available in Python?

Accepted Answer

truncate()

Answer

split()

Answer

replace()

Answer

upper()

Question 3

Which of the following string comparison operators returns True if the strings are equal, ignoring case?

Accepted Answer

==

Answer

!=

Answer

>=

Question 4

What is the purpose of the strip() method?

Accepted Answer

To remove leading and trailing whitespace from a string

Answer

To convert a string to lowercase

Answer

To split a string into a list

Answer

To replace all occurrences of a character in a string

Question 5

What does the following regular expression match: '[A-Za-z0-9]+'

Accepted Answer

One or more consecutive alphanumeric characters

Answer

Any single character

Answer

Any whitespace character

Answer

Any special character

Question 6

What is the number of characters in the string 'Hello World'?

Accepted Answer

11

Answer

5

Question 7

Which operator is used in Python to concatenate two strings?

Accepted Answer

+

Answer

*

Answer

&

Answer

~

Question 8

Which of the following functions can be used in C++ to convert a string to uppercase?

Accepted Answer

toupper()

Answer

tolower()

Answer

uppercase()

Answer

toUpper()

Question 9

In PHP, which of the following functions can be used to find the position of a substring within a string?

Accepted Answer

strpos()

Answer

strchr()

Answer

strstr()

Answer

find()

Question 10

Consider the following Python code:

**text = "Hello, World!"**

Which of the following operations will **NOT** produce an error?

Accepted Answer

text.upper()

Accepted Answer

text.split()

Answer

text[-1] = "!"

Answer

text.remove("Hello")

Question 11

Which function in Python is used to join two strings together?

Accepted Answer

str.join()

Answer

str.concat()

Answer

str.add()

Answer

str.combine()

Question 12

What will be the output of the following Python code: `message = 'Hello'; message.upper()`?

Accepted Answer

HELLO

Answer

hello

Answer

Hello

Answer

No change

Question 13

Which operator in Python is used to check if two strings are equal?

Accepted Answer

==

Answer

!=

Answer

<=>

Answer

>=

Question 14

What is the purpose of the `str.replace()` method in Python?

Accepted Answer

To replace characters in a string

Answer

To remove characters from a string

Answer

To concatenate strings

Answer

To compare strings

Question 15

What is the difference between using single quotes and double quotes for strings in Python?

Accepted Answer

Double quotes can contain single quotes, but single quotes cannot contain double quotes

Answer

No difference

Answer

Single quotes can contain double quotes, but double quotes cannot contain single quotes

Answer

Single quotes are used for character literals, while double quotes are used for strings

Question 16

What would be the output of the following Python code: `sentence = 'Hello World'; sentence[2:5]`?

Accepted Answer

llo

Answer

Hello

Answer

World

Answer

Index out of range

Question 17

Which method in Python is used to calculate the length of a string?

Accepted Answer

len()

Answer

str.length()

Answer

get_length()

Answer

count()

Question 18

Which function in Python is used to convert a string to uppercase?

Accepted Answer

upper()

Answer

capitalize()

Answer

toUpper()

Answer

makeUpper()

Question 19

What is the purpose of the 'len()' function in Python when used with strings?

Accepted Answer

To determine the number of characters in a string

Answer

To concatenate two strings

Answer

To compare two strings

Answer

To convert a string to uppercase

Question 20

What is the output of the following Python code: print('Hello'[::-1])

Accepted Answer

olleH

Answer

'Hello'

Answer

olleh

Answer

Hello

Question 21

Which of the following Python statements will remove all whitespace characters from a string?

Accepted Answer

my_string.strip()

Answer

my_string.replace(' ', '')

Answer

my_string.rstrip()

Answer

my_string.lstrip()

Question 22

What is the result of the following Python expression: 'a' in 'banana'

Accepted Answer

True

Answer

False

Answer

'a'

Answer

False

Question 23

Which of the following Python string methods is used to search for the first occurrence of a substring within a string?

Accepted Answer

find()

Answer

index()

Answer

count()

Answer

rfind()

Question 24

What is the purpose of the 'isdigit()' method in Python when used with strings?

Accepted Answer

To check if all characters in a string are digits

Answer

To remove all digits from a string

Answer

To convert a string to an integer

Answer

To find the number of digits in a string