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Python Functions Multiple Choice Questions with Answers for Students
What does the open() function do in Python when used with the “w” mode for file handling?
a. It opens an existing file to read its content.
b. It opens a file for writing and creates a new one if it doesn’t exist.
c. It allows both reading and writing to a file at the same time.
d. It opens a file to add new data at the end.
Option b – It opens a file for writing and creates a new one if it doesn’t exist.
Which built-in function checks if a string is a palindrome?
a. is_palindrome()
b. is_string_palindrome()
c. palindrome_check()
d. check_for_palindrome()
Option a – is_palindrome()
Which built-in function is used to count how many times a substring appears in a string?
a. count()
b. occurrences_count()
c. substring_count()
d. find_substring()
Option a – count()
Which built-in function helps identify the most frequent element in an iterable based on a given key function?
a. common_element()
b. most_frequent()
c. find_most_common()
d. max_occurrence()
Option b – most_frequent()
What is the role of the int() function in Python?
a. To verify if a value is an integer.
b. To convert a floating-point number into an integer.
c. To compute the absolute value of a number.
d. To perform division of integers.
Option b – To convert a floating-point number into an integer.
Which built-in function is used to convert a string to uppercase?
a. convert_to_upper()
b. make_uppercase()
c. upper()
d. change_case_to_upper()
Option b – make_uppercase()
What happens when the max() function is applied to a string in Python?
a. It returns the character with the lowest value.
b. It adds up the ASCII values of characters.
c. It identifies the character with the highest ASCII value.
d. It transforms the string into title case.
Option c – It identifies the character with the highest ASCII value.
Why would you define a user-defined function in Python?
a. To check whether a number is even or odd.
b. To create new data structures.
c. To group code that can be reused.
d. To perform mathematical calculations.
Option c – To group code that can be reused.
What is a “docstring” in Python functions?
a. A string used to store textual data.
b. A string that provides documentation for the function.
c. A loop construct used within functions.
d. A special keyword used for function definitions.
Option b – A string that provides documentation for the function.
Can a function in Python have multiple return statements?
a. Yes, but only if each return is linked to a different variable.
b. Yes, and the function returns the first value encountered by the return statement.
c. No, a function can only have a single return statement.
d. Yes, and the function returns the value of the last executed return statement.
Option d – Yes, and the function returns the value of the last executed return statement.
What does a “function call” in Python refer to?
a. The process of defining a function.
b. A built-in function used to invoke other functions.
c. The execution of a function by specifying its name and passing the required parameters.
d. The act of writing a function’s documentation.
Option c – The execution of a function by specifying its name and passing the required parameters.
What does the float() function do in Python?
a. It converts a value into a floating-point number.
b. It finds the highest value in a list.
c. It generates random floating-point values.
d. It computes the average of a list of numbers.
Option a – It converts a value into a floating-point number.
What do we call a set of instructions grouped under a single name?
a. Definition
b. Method
c. Turtle
d. Module
e. Function
Option e – Function
Which of the following is not a valid choice for naming a variable in Python?
a. a
b. len
c. length
d. x
Option b – len
Identify the function header that contains a syntax error.
a. def total(n1, n2, n=3):
b. def scan(p1, p2-4, p3-5):
c. def divide(p1=4, p2, p3):
d. def multiply(p1, n1, m1):
Option c – def divide(p1=4, p2, p3):
What do you call a function that does not give back any value?
a. Default function
b. Zero function
c. Void function
d. Null function
Option c – Void function
Which keyword is used to send data from a function back to where it was called?
a. send
b. give
c. return
d. take
Option c – return
What does the return keyword achieve in a function?
a. Sends back a value
b. Transfers control to the caller
c. Performs both value return and control transfer
d. Does nothing special
Option a – Sends back a value
Select the correct statement regarding Python functions:
a. It’s possible to define a function with neither arguments nor a return value.
b. Functions can be defined without parameters but still return a value.
c. A function can take arguments but not return anything.
d. All of the above are valid
Option d – All of the above are valid
Which among these is not a standard Python built-in function?
a. input()
b. tuple()
c. print()
d. dictionary()
Option d – dictionary()
Which one is not considered a valid type of function argument in Python?
a. Required argument
b. Keyword argument
c. Initial argument
d. Default argument
Option c – Initial argument
What term is used for functions written by the programmer?
a. Predefined
b. Library
c. Custom-defined
d. Logical
Option c – Custom-defined
What are the smaller components called when a program is split into parts?
a. Functions
b. Operators
c. Logical units
d. Specific segments
Option a – Functions
How does the use of functions affect the length of a program?
a. Increases it
b. Decreases it
c. No significant change
d. Not applicable
Option b – Decreases it
Do you always need to import a module to access built-in functions?
a. Yes
b. No
Option b – No
How often can you call a function in a single program?
a. Three times
b. Seven times
c. Four times
d. Unlimited times
Option d – Unlimited times
Which of the following does not belong to the group of type conversion functions?
a. int()
b. str()
c. input()
d. float()
Option c – input()
Can the abs() function be applied to floating-point numbers?
a. Yes
b. No
Option b – No
Is it true that len() only works to find the length of strings?
a. Yes
b. No
Option b – No
Why is the None keyword used in Python functions?
a. To define a placeholder function that does nothing
b. To mark the end of a function
c. To indicate an undefined or absent value
d. It causes a syntax error in Python
Option c – To indicate an undefined or absent value
What defines a recursive function in Python?
a. A function that invokes itself
b. A function that uses loops instead of recursion
c. A function with no parameters
d. A function using the recursion keyword
Option a – A function that invokes itself
What is the scope of a variable created inside a Python function?
a. Global
b. Local
c. Both local and global
d. No specific scope
Option b – Local
Which method of passing arguments is invalid in Python functions?
a. Positional arguments
b. Keyword arguments
c. Default values
d. Variable arguments
Option b – Keyword arguments
What is a lambda function in Python?
a. A function that runs without parentheses
b. A function written using the def keyword
c. A short anonymous function defined with lambda
d. A function that comes built into Python
Option c – A short anonymous function defined with lambda
How do you properly call a function in Python?
a. call()
b. invoke()
c. run()
d. Using its name followed by parentheses, like function_name()
Option d – Using its name followed by parentheses, like function_name()
What does a function return in Python if there is no return statement?
a. None
b. Zero
c. True
d. It throws an error
Option a – None
Which of these is not a valid way to define a function in Python?
a. def my_function():
b. function my_function():
c. def my_function
d. def my_function(param1, param2);
Option b – function my_function():
Is it possible to have more than one return statement in a Python function?
a. Yes, but they must return different data types
b. Yes, only if used within a loop
c. No, only one return is allowed per function
d. Yes, and they can be placed anywhere in the function
Option d – Yes, and they can be placed anywhere in the function
Why is the pass statement used in a Python function?
a. To halt the program
b. To skip the function entirely
c. To create an empty block of code
d. To print a message
Option c – To create an empty block of code
What’s the distinction between defining and calling a function?
a. Definition creates the function, calling runs it
b. Definition runs the function, calling defines it
c. They are the same action
d. There is no difference between the two
Option a – Definition creates the function, calling runs it
What is the scope of a variable declared outside all functions?
a. Local
b. Global
c. Limited to the function
d. Undefined scope
Option a – Local
What correctly describes the behavior of functions in Python?
a. Functions are blocks of code that run only when called and always give back a result
b. Functions execute only when invoked and can be used multiple times within a program
c. Python does not allow defining functions inside other functions
d. All of the above
Option b – Functions execute only when invoked and can be used multiple times within a program
Which of the following is the correct keyword for defining a function in Python?
a. Define
b. Fun
c. Def
d. Function
Option c – Def
What components typically make up a Python function’s header?
a. Name of the function
b. List of parameters
c. The value returned
d. Both a and b
Option d – Both a and b
What is returned when a Python function doesn’t include a return statement?
a. None
b. 0
c. Null
d. An unpredictable value
Option a – None
Where in memory are local variables and function parameters saved during execution?
a. Heap memory
b. Stack memory
c. Data segment for uninitialized variables
d. None of the listed options
Option b – Stack memory
Is lambda considered a function in Python?
a. Yes
b. No
c. Lambda functions exist but users cannot access them
d. Not applicable
Option a – Yes
What is the term for a variable created outside all functions?
a. Local variable
b. Global variable
c. Static variable
d. Automatic variable
Option b – Global variable
Which syntax correctly shows how to define a function in Python?
a. def function function_name():
b. declare function function_name():
c. def function_name():
d. declare function_name():
Option c – def function_name():
Which of the following is not a valid scope for a variable?
a. Local
b. Global
c. External
d. None of the above
Option c – External
Which of the following is not a built-in Python function?
a. input()
b. tuple()
c. print()
d. dictionary()
Option d – dictionary()
Which of the following is not a recognized type of function argument?
a. Required argument
b. Keyword argument
c. Initial argument
d. Default argument
Option c – Initial argument
Which module is necessary to use the randint() function in Python?
a. rand
b. random
c. randrange
d. randomrange
Option b – random
Identify the incorrect statement:
a. print(pow(2, 3))
b. print(pow(2.3, 3.2))
c. print(pow(2, 3, 2))
d. None of the above
Option c – print(pow(2, 3, 2))
What is the main purpose of a function in Python?
a. To store data
b. To perform a specific task or computation
c. To define a class
d. To add comments
Option b – To perform a specific task or computation
Which of the following statements is true about Python function names?
a. Function names must always begin with an uppercase letter
b. Function names are case-sensitive
c. Function names cannot include numbers
d. Function names can contain spaces
Option b – Function names are case-sensitive
Is it possible for a Python function to return multiple values?
a. No, a function can only return a single value.
b. Yes, a function can return a tuple.
c. Yes, a function can return a list.
d. Yes, a function can return multiple values separated by commas.
Option b – Yes, a function can return a tuple.
What is the scope of a variable declared inside a Python function?
a. It becomes a global variable.
b. It can only be accessed within the function.
c. It can be accessed both inside and outside the function.
d. It depends on the function’s name.
Option b – It can only be accessed within the function.
Which of the following methods can be used to return multiple values from a Python function?
a. By using a list
b. By using a tuple
c. By using a dictionary
d. A function can only return a single value
Option b – By using a tuple
Is it possible to define a function within another function in Python?
a. Yes, this is called a nested function
b. No, nested functions are not supported in Python
c. Nested functions can only be defined if the outer function is a lambda function
d. Nested functions are allowed only if the inner function is a generator function
Option a – Yes, this is called a nested function
What does the **kwargs parameter serve in a Python function?
a. It allows the function to accept keyword arguments passed as a dictionary
b. It defines default keyword arguments
c. It specifies the order of keyword arguments
d. **kwargs is not a valid parameter in Python functions
Option a – It allows the function to accept keyword arguments passed as a dictionary
How would you describe a docstring in Python?
a. A data type used to store string values
b. A form of comment used within code
c. A string literal that provides documentation for a function, placed at the start
d. A keyword used to format strings
Option c – A string literal that provides documentation for a function, placed at the start
What does the enumerate() function do in Python?
a. It counts the number of characters in a string
b. It creates an enumerated list of items
c. It generates a sequence of numbers
d. It triggers an exception
Option d – It triggers an exception
What is the role of the if __name__ == "__main__": block in Python?
a. It is used to define a main function
b. It serves as a comment within the code
c. It checks whether a variable has been defined
d. It ensures that the code runs only when the script is executed directly, not when imported as a module
Option d – It ensures that the code runs only when the script is executed directly, not when imported as a module
What is meant by a function signature in Python?
a. It refers to the unique name of a function
b. It is a special character used in function names
c. It is the keyword used to declare a function
d. The concept of function signature does not exist in Python
Option a – It refers to the unique name of a function
Which built-in Python function is used to determine the length of a sequence (such as a string, list, or tuple)?
a. size()
b. length()
c. len()
d. count()
Option c – len()
What does the abs() function do in Python?
a. It returns the absolute value of a number
b. It converts a string to uppercase
c. It removes any leading and trailing spaces from a string
d. It checks whether a string consists only of alphabetic characters
Option a – It returns the absolute value of a number
Which built-in function is used to get the maximum value from an iterable (e.g., a list or tuple)?
a. max()
b. maximum()
c. find_max()
d. peak()
Option a – max()
What is the purpose of the type() function in Python?
a. It converts a string into a numeric type (e.g., int or float)
b. It checks if a variable is of a specific type
c. It performs type casting
d. It creates a new type
Option b – It checks if a variable is of a specific type
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