Prepare Smarter for Your Next Python Exam!
This page brings you a carefully curated set of 50 Python and Object-Oriented Programming (OOPs) interview questions designed for aspiring Data Analysts and Data Scientists. Covering easy, intermediate, and hard-level MCQs, these questions test your understanding of Python fundamentals, OOP principles, and advanced coding concepts that are essential for solving real-world data problems. Whether you’re brushing up before an interview or strengthening your technical foundation, this collection will help you practice, revise, and build confidence in core programming skills for data-driven careers.

Name

Email

Course

Phone

Which Python feature supports multiple forms of a function name? 2 Marks

Polymorphism

Generators

Method overloading

Duck typing

Which special method is used to represent an object as a string? 2 Marks

str

format

print

repr

Which OOP concept allows multiple methods with the same name but different behavior? 2 Marks

Abstraction

Polymorphism

Encapsulation

Inheritance

Which method is automatically called when an object is deleted? 2 Marks

destroy()

del

close

init

What will be the output? 2 Marks

[1, 1, 2, 3, 5]

[0, 1, 1, 2, 3]

[0, 1, 2, 3, 4]

Error

Which operator is used for floor division in Python?

%

**

/

//

Which OOP principle hides implementation details from the user?

Inheritance

Encapsulation

Polymorphism

Abstraction

Which statement is correct regarding Python exceptions?

c) Only one except block is allowed per try

d) Exceptions cannot be user-defined

a) Python does not support exception handling

b) The finally block always executes regardless of an exception

What will this output? 5 Marks

[2, 3, 5, 7]

[2, 3, 5, 7, 9]

[2, 4, 6, 8, 10]

Error

What does self represent in Python classes? 2 Marks

A function pointer

The instance of the class

A global variable

The class itself

What does is operator check in Python?

Identity (same object in memory)

Type check

None of the above

Value equality

What is the default return type of input() function in Python?

int

float

str

bool

In multiple inheritance, the “diamond problem” arises when: 2 Marks

d) Two classes share the same constructor

c) Functions call themselves recursively

a) Two classes inherit from the same class and a third inherits from both

b) Classes contain same method names with different arguments

Which of the following collections in Python is immutable?

Tuple

List

Set

Dictionary

What will be the output of this program? 5 Marks

101

Error

Not defined

None

Which function returns the length of a list?

count()

size()

len()

length()

Which method in OOP is automatically called when an object is created? 2 Marks

__init__

__call__

__str__

__del__

Which of the following is true about Python memory management?

Python does not allow dynamic memory allocation

Python uses a garbage collector for automatic memory management

Memory is released only when program terminates

Python variables must be declared with types before use

Which decorator defines a method that does not take self or cls? 2 Marks

@abstractmethod

@classmethod

@property

@staticmethod

Which of these allows creating private attributes in Python? 2 Marks

a) Start attribute name with __

b) Start attribute name with _

d) Not possible

c) Use @private

What will print("Data"[::-1]) return? 2 Marks

Data

Dtaa

Error

ataD

What is the correct way to define a function in Python?

func myfunc():

define myfunc():

def myfunc():

function myfunc():

Which of the following defines a constructor in Python?

init()

__new__

__init__

__construct__

Which keyword is used to inherit from a parent class? 2 Marks

super

extends

parent

class Child(Parent)

Which function converts a list into a set?

set()

list()

tuple()

dict()

Which of the following best describes Pickling in Python? 2 Marks

Encrypting Python code

Making code portable

Compressing data files

Converting Python objects into byte stream for storage/transfer

What will this output? 2 Marks

Error

True

False

None

What is the output of bool("")?

False

Error

None

True

In Python, strings are:

None

Both

Immutable

Mutable

What will this print? 5 Marks

Error

[[1], [1,1], [1,2,1], [1,3,3,1]]

[[1], [2], [3], [4]]

[[1], [1,2], [2,3], [3,4]]

What is the output of print(2**3)?

Error

6

8

9

Which of the following is a valid Python data type?

int, str, float

bool, list, dict

tuple, set

All of the above

Python – Global Interpreter Lock (GIL)

Allows true parallel execution of threads

Prevents multiple native threads from executing Python bytecodes simultaneously

Enhances multiprocessing

Is not used in CPython

What will this code output? 2 Marks

a) [1], [2], [3]

c) Error

d) None

b) [1], [1,2], [1,2,3]

What will type(3.0) return?

float

decimal

double

int

Which OOP concept is used in method overriding? 2 Marks

b) Encapsulation

c) Inheritance

a) Polymorphism

d) Both a and c

What will be printed? 5 Marks

B

Error

C

A

Which of the following statements about Python modules is correct?

c) Both (a) and (b)

b) A package is a collection of modules organized in a directory

d) Neither (a) nor (b)

a) A module is a single file containing Python definitions and statements

Which of the following is not a valid Python keyword?

var

lambda

async

finally

Python OOPs Interview Questions Exam