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Python Functions MCQ For Interview Preparation
Why are functions used in Python?
a. To display messages on the screen
b. To keep data safe
c. To carry out a specific operation or group of operations
d. To make a loop
Option c – To carry out a specific operation or group of operations
What is the correct way to create a function in Python?
a. By starting with ‘def’ followed by the function name and its arguments
b. By using the function keyword before the function name
c. By typing define followed by the name and parameters
d. Python generates functions on its own
Option a – By starting with ‘def’ followed by the function name and its arguments
What does the term ‘parameter’ mean in a Python function?
a. It stores the function’s outcome
b. It holds the name of the function
c. It is a value sent into a function when it’s called
d. It is a fixed keyword in Python
Option c – It is a value sent into a function when it’s called
Which word is used in Python to send a value back from a function?
a. result
b. break
c. return
d. output
Option c – return
How can you indicate that a variable should be passed by reference to a function in Python?
a. Use the pass keyword
b. Use byref
c. Use ref
d. Variables in Python are inherently passed by reference
Option d – Variables in Python are inherently passed by reference
Why is the *args syntax used in a Python function?
a. To define values that are used by default
b. To let the function handle any number of positional inputs
c. To let the function handle named inputs
d. To define arguments that must always be provided
Option b – To let the function handle any number of positional inputs
Which option below shows an incorrect method of passing keyword arguments in Python?
a. function_name(arg1=value1, arg2=value2)
b. function_name(value1, value2)
c. function_name(arg2=value2, arg1=value1)
d. function name(value2, arg1=value1)
Option b – function_name(value1, value2)
What is the role of **kwargs in a Python function?
a. To set default named parameters
b. To allow multiple named parameters to be received
c. To create a flexible function that takes any kind of input
d. To pass keyword arguments using a list
Option b – To allow multiple named parameters to be received
Do Python functions always return a value?
a. Yes
b. No
Option b – No
What is the correct syntax to invoke a function in Python?
a. function_name()
b. call function_name()
c. ret function_name()
d. function function_name()
Option a – function_name()
Which of the following statements is not true?
a. Variables declared inside a function are called local variables.
b. Local variables can be used in other functions, but not in the global scope.
c. Variables declared outside of any function are known as global variables.
d. To modify a global variable within a function, the global keyword must be used.
Option b – Local variables can be used in other functions, but not in the global scope.
Which keyword starts a function definition in Python?
a. Define
b. Fun
c. Function
d. Def
Option d – Def
How many arguments can a return statement provide?
a. None
b. One
c. Two
d. Any number
Option b – One
Which type of arguments are passed to a function in their exact sequence?
a. Required arguments
b. Keyword arguments
c. Default arguments
d. Variable-length arguments
Option a – Required arguments
How many times can a function be executed in a Python program?
a. 2
b. 3
c. 5
d. Any number of times
Option d – Any number of times
Which one of the following is a correct function call?
a. call sum()
b. def sum()
c. sum()
d. function sum()
Option c – sum()
What are the benefits of using functions in coding?
a. They make the code more understandable
b. They help reuse code
c. They simplify debugging
d. All of the above
Option d – All of the above
What do we call functions that come pre-built with Python?
a. User-defined functions
b. Library functions
c. Built-in functions
d. Both b and c
Option c – Built-in functions
How should a function be called in a program?
a. []
b. {}
c. ()
d. None of the above
Option c – ()
What name is given to functions that don’t return any data?
a. Default functions
b. Zero functions
c. Void functions
d. Null functions
Option c – Void functions
Which keyword is used to send data back from a function?
a. Send
b. Give
c. Return
d. Take
Option c – Return
Which statement below is accurate?
a. You can define a function without arguments and without a return value
b. You can define a function without arguments but with a return value
c. You can define a function with arguments and no return value
d. All of the above
Option d – All of the above
Which data structure allows a function to return multiple values?
a. List
b. Tuple
c. String
d. Dictionary
Option b – Tuple
The area of a program where a variable can be used is known as its:
a. Scope
b. Module
c. Part
d. None of the above
Option a – Scope
Which Python keyword allows you to assign a default value to a function parameter?
a. default
b. def
c. value
d. none
Option d – none
How do you invoke a Python function using named parameters?
a. With square brackets
b. With curly braces
c. By using parentheses and writing parameter names
d. With angle brackets
Option c – By using parentheses and writing parameter names
What does the return keyword do in a Python function?
a. Ends the program
b. Displays output on the screen
c. Declares a variable
d. Sends a value back from the function
Option d – Sends a value back from the function
Is it possible to define a function within another function in Python?
a. Yes, it’s called a nested function
b. No, this feature is not supported
c. Only in the case of a lambda function
d. Only if the inner one is a generator
Option a – Yes, it’s called a nested function
What separates defining a function from using (calling) it in Python?
a. No distinction exists
b. Defining explains what the function does; calling makes it run
c. Defining sets parameters; calling names the function
d. Calling is used to make a new function
Option b – Defining explains what the function does; calling makes it run
Is it allowed to create a function in Python that doesn’t take any parameters?
a. No, at least one parameter is required
b. Yes, parameters are optional
c. Only allowed in lambda functions
d. Only possible for anonymous functions
Option b – Yes, parameters are optional
What is the role of the pass statement in Python?
a. Skips an iteration in a loop
b. Triggers an error
c. Creates a new variable
d. Acts as a placeholder and performs no action
Option d – Acts as a placeholder and performs no action
Which of these is correct about naming functions in Python?
a. Names can include spaces
b. Names can begin with a number
c. Special characters like @, $, or # are allowed
d. Function names must follow variable naming rules
Option d – Function names must follow variable naming rules
Choose the correct way to call a Python function named my_function with two inputs:
a. call my_function(1, 2)
b. my_function(1, 2)
c. my_function(1 2)
d. call my_function 1, 2
Option b – my_function(1, 2)
Which keyword allows a function to access a variable defined outside its scope?
a. Local
b. Global
c. Scope
d. Variable
Option b – Global
What happens when you use len() on a string in Python?
a. Returns how many characters the string has
b. Returns how many words are in the string
c. Gives the final character in the string
d. Reverses the string
Option a – Returns how many characters the string has
What does None signify in Python?
a. An empty text value
b. The number zero
c. No value or null
d. A positive whole number
Option c – No value or null
What does the input() function do in Python?
a. It outputs text to the screen.
b. It captures input from the user via the keyboard.
c. It converts a string into an integer.
d. It creates random numbers.
Option b – It captures input from the user via the keyboard.
What is the purpose of the round() function in Python?
a. It approximates a number to the nearest integer.
b. It calculates the square root of a number.
c. It generates random values.
d. It computes the factorial of a number.
Option a – It approximates a number to the nearest integer.
Which function is used in Python to convert a number into a string?
a. str()
b. int_to_str()
c. number_to_string()
d. convert_string()
Option a – str()
What is the functionality of the sum() function in Python?
a. It calculates the product of all elements in a list.
b. It computes the total sum of elements in an iterable.
c. It calculates the difference between two numbers.
d. It finds the largest element in a list.
Option b – It computes the total sum of elements in an iterable.
Which function in Python is used to obtain the minimum value from an iterable, such as a list or tuple?
a. min()
b. minimum()
c. find_min()
d. bottom()
Option a – min()
What is the purpose of the join() function in Python?
a. It concatenates strings together.
b. It creates a new list from the elements of an iterable.
c. It combines multiple dictionaries into one.
d. It joins all elements of an iterable using a specific separator.
Option d – It joins all elements of an iterable using a specific separator.
Which function checks if a value falls within a given range in Python?
a. range()
b. in_range()
c. is_within()
d. between()
Option a – range()
What does the any() function do in Python?
a. It checks whether one value is greater than another.
b. It verifies if all elements in an iterable are True.
c. It returns the first element from an iterable.
d. It checks if at least one element in an iterable is True.
Option b – It verifies if all elements in an iterable are True.
Which function is used to find the index of the first occurrence of an element in a list?
a. find_index()
b. first_index()
c. index()
d. search()
Option c – index()
What is the function of the zip() function in Python?
a. It compresses files into a zipped format.
b. It extracts files from a zipped format.
c. It creates a zip archive from files.
d. It pairs elements from multiple iterables into tuples.
Option d – It pairs elements from multiple iterables into tuples.
Which function is used to open and read a file in Python?
a. open_file()
b. read_file()
c. file_open()
d. open()
Option d – open()
What does the max() function do in Python?
a. It finds the smallest value in a list.
b. It identifies the largest value in an iterable, such as a list or tuple.
c. It counts how many elements are in an iterable.
d. It calculates the mean of a sequence of numbers.
Option b – It identifies the largest value in an iterable, such as a list or tuple.
What is the purpose of the min() function in Python?
a. To find the smallest value in an iterable, like a list.
b. To calculate the average of a list of numbers.
c. To generate random integer values.
d. To convert a string to lowercase.
Option a – To find the smallest value in an iterable, like a list.
What does the sorted() function do in Python?
a. Generates random numbers.
b. Computes the square root of a number.
c. Arranges the elements of an iterable (e.g., list) in ascending order.
d. Creates a new list.
Option c – Arranges the elements of an iterable (e.g., list) in ascending order.
Which function is used to verify if all characters in a string are alphabetic?
a. is_alpha()
b. check_alpha()
c. all_alpha()
d. alphabetic()
Option a – is_alpha()
What is the role of the format() function in Python?
a. Computes the square of a number.
b. Adjusts the formatting of a string using specified format codes.
c. Generates random numbers.
d. Verifies if a string is in lowercase.
Option b – Adjusts the formatting of a string using specified format codes.
Which built-in function is used to find and replace a substring within a string?
a. find()
b. replace()
c. search()
d. substring()
Option b – replace()
Which built-in function checks if all characters in a string are numeric?
a. is_digit()
b. check_digits()
c. all_digits()
d. digit_check()
Option a – is_digit()
What is the primary purpose of the list() function in Python?
a. Converts an iterable (e.g., string, tuple) into a list.
b. Performs concatenation of lists.
c. Finds the maximum element in a list.
d. Removes an element from a list.
Option a – Converts an iterable (e.g., string, tuple) into a list.
Which built-in function is used to convert a string to lowercase in Python?
a. convert_lowercase()
b. lower()
c. to_lower()
d. casefold()
Option b – lower()
What does the map() function do in Python?
a. Sorts a list.
b. Applies a function to each item in an iterable and returns an iterator.
c. Computes the square root of a number.
d. Generates a sequence of numbers.
Option b – Applies a function to each item in an iterable and returns an iterator.
Which function is used to calculate the power of a number in Python?
a. power()
b. pow()
c. calculate_power()
d. exp()
Option b – pow()
What is the primary function of the range() function in Python?
a. Performs arithmetic on a sequence of numbers.
b. Checks if a value falls within a given range.
c. Creates a sequence of numbers within a specified range.
d. Finds the maximum value in a list.
Option c – Creates a sequence of numbers within a specified range.
What does the zip() function do in Python?
a. Compresses files.
b. Combines multiple iterables into a single iterable of tuples.
c. Generates random integers.
d. Extracts files from a zip archive.
Option b – Combines multiple iterables into a single iterable of tuples.
Which built-in function splits a string into a list of substrings based on a given delimiter?
a. split()
b. delimiter()
c. substring()
d. split_string()
Option a – split()
What is the purpose of the hex() function in Python?
a. Converts a string to hexadecimal format.
b. Returns the absolute value of a number.
c. Converts an integer to a hexadecimal string.
d. Computes the square root of a number.
Option c – Converts an integer to a hexadecimal string.
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