Python MCQs

Question 1

What is the difference between a list and a tuple in Python?

Accepted Answer

A list is mutable and can be changed after creation, while a tuple is immutable

Answer

A tuple is mutable, while a list is immutable

Answer

Both are immutable and behave identically

Answer

A list can only store numbers, while a tuple can store any type

Question 2

What does the *args syntax allow a Python function to accept?

Accepted Answer

A variable number of positional arguments, collected into a tuple

Answer

A variable number of keyword arguments, collected into a dictionary

Answer

Exactly one optional argument

Answer

A fixed number of arguments defined at import time

Question 3

What is a Python decorator?

Accepted Answer

A function that wraps another function to modify or extend its behavior without changing its actual code

Answer

A special type of comment used for documentation

Answer

A built-in data type for storing key-value pairs

Answer

A tool used only for formatting code style

Question 4

What is the purpose of the __init__ method in a Python class?

Accepted Answer

It acts as the constructor, initializing a new object's attributes when it is created

Answer

It deletes an object from memory when called

Answer

It defines a static method for the class

Answer

It converts an object into a string representation

Question 5

What is the difference between '==' and 'is' in Python?

Accepted Answer

'==' compares the values of two objects, while 'is' checks whether they are the same object in memory

Answer

'is' compares values, while '==' checks memory location

Answer

Both operators behave identically in all cases

Answer

'is' can only be used with numbers, not other data types

Question 6

What is a list comprehension in Python?

Accepted Answer

A concise way to create a list by applying an expression to each item in an iterable, optionally with a condition

Answer

A method for sorting a list in place

Answer

A built-in function for converting a list to a tuple

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A way to permanently lock a list so it cannot be modified

Question 7

What does the Python 'self' parameter refer to inside a class method?

Accepted Answer

The current instance of the class on which the method is being called

Answer

The parent class of the current class

Answer

A global variable shared across all instances

Answer

The name of the class itself

Question 8

What is the purpose of Python's 'with' statement when working with files?

Accepted Answer

It ensures the file is automatically closed once the block of code finishes, even if an error occurs

Answer

It opens a file in a special read-only mode permanently

Answer

It creates a backup copy of the file automatically

Answer

It converts the file's contents into a Python list

Question 9

What is the output of the following expression in Python: type(5 / 2)?

Accepted Answer

float

Answer

int

Answer

str

Answer

bool

Question 10

What is a Python generator?

Accepted Answer

A function that uses 'yield' to produce a sequence of values lazily, one at a time, instead of returning them all at once

Answer

A tool for generating random numbers only

Answer

A built-in class used for creating new Python modules

Answer

A function that always runs faster than a normal function

Question 11

What is the difference between a shallow copy and a deep copy in Python?

Accepted Answer

A shallow copy duplicates the outer object but still references the same nested objects, while a deep copy duplicates everything recursively

Answer

A deep copy only works with strings, while a shallow copy works with any type

Answer

Both copy types behave identically in every case

Answer

A shallow copy is always faster but produces an entirely independent object

Question 12

What does the Python 'pass' statement do?

Accepted Answer

It acts as a placeholder that does nothing, allowing code to run without implementing logic yet

Answer

It permanently skips the rest of the current loop iteration

Answer

It exits the current function immediately

Answer

It raises an exception intentionally

Question 13

What is the purpose of Python's try-except block?

Accepted Answer

To catch and handle exceptions that occur during the execution of code, preventing the program from crashing

Answer

To permanently prevent any error from occurring in the code

Answer

To repeat a block of code a fixed number of times

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To define a new function inside another function

Question 14

What does the Python built-in function 'zip()' do?

Accepted Answer

Combines multiple iterables element-wise into tuples

Answer

Compresses a file into a smaller size

Answer

Sorts a list in ascending order

Answer

Removes duplicate values from a list

Question 15

What is the key difference between a Python set and a list?

Accepted Answer

A set stores only unique, unordered elements, while a list can store duplicates in a defined order

Answer

A set can store duplicate values, while a list cannot

Answer

A list is always faster to search than a set

Answer

Both behave identically in terms of ordering and uniqueness

Question 16

What does the Python keyword 'global' do inside a function?

Accepted Answer

It allows the function to modify a variable defined outside its local scope, at the module level

Answer

It creates a new variable that is only accessible inside that function

Answer

It permanently deletes a variable from memory

Answer

It converts a local variable into a constant

Question 17

What is the result of evaluating '3' + '4' in Python?

Accepted Answer

'34'

Answer

7

Answer

'7'

Answer

Error, since strings cannot be added

Question 18

What is the purpose of the Python 'enumerate()' function?

Accepted Answer

It returns both the index and the value of each item while looping over an iterable

Answer

It converts a list into a dictionary

Answer

It removes duplicate values from an iterable

Answer

It reverses the order of elements in an iterable

Question 19

What does Python's Global Interpreter Lock (GIL) do?

Accepted Answer

It ensures that only one thread executes Python bytecode at a time within a single process

Answer

It permanently prevents Python programs from using more than one variable at a time

Answer

It locks a file so other programs cannot access it

Answer

It restricts Python programs to running only on a single operating system

Question 20

What is the difference between append() and extend() when used on a Python list?

Accepted Answer

append() adds a single item to the end of the list, while extend() adds all items from an iterable individually

Answer

extend() adds a single item, while append() adds multiple items

Answer

Both methods behave identically in every case

Answer

append() can only be used with numbers, while extend() works with any type

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Python MCQ Questions