85 interview questions on Python for developers (2025)

Easy

36 votes1938 runs1 comment

Write a Python function that returns the factorial of a number.

Back-end developer

recursion

Vincent Cotroat Mar 28, 2023

Hard

22 votes2316 runs0 comment

Write a Python function that prints the elements of a list.

Back-end developer

list

for loop

Anonymous authorat Mar 28, 2022

Medium

12 votes2099 runs0 comment

Use the zip() function to iterate over two lists in parallel.

Back-end developer

list

zip

Anonymous authorat Mar 28, 2022

Medium

10 votes2358 runs0 comment

Start a HTTP server from the CLI with python

Back-end developer

cli

http

Anonymous authorat Jan 23, 2023

Easy

10 votes2073 runs0 comment

What type is `function_a` in the following code ?

Back-end developer

functions

decorators

Anonymous authorat Mar 28, 2022

Hard

8 votes2229 runs

2 comments

Why is the output of the following code undefined? ``` def f(n): return n + 1 f(n) ```

Back-end developer

python

scope

Antoine Brennerat Dec 2, 2021

Expert

7 votes1952 runs0 comment

Find the word 'lazy' in a sentence using Python

Back-end developer

regex

python

Anonymous authorat Mar 28, 2022

Medium

6 votes1970 runs0 comment

What do `a^b`, `a|b` and `a-b` respectively represent in Python ?

Back-end developer

sets

union

difference

Anonymous authorat Mar 28, 2022

Hard

5 votes2232 runs0 comment

In Python, what is the output of the following code? `valueA = 10; valueB = 10; valueA is valueB`

Back-end developer

python

boolean

Antoine Brennerat Dec 2, 2021

Hard

5 votes2232 runs

2 comments

Write a Python program to open a file in binary mode and write a string to it.

Back-end developer

python

file

binary

Antoine Brennerat Dec 2, 2021

Hard

5 votes2227 runs0 comment

What is the output of the following code? ``` import asyncio async def read_data(): with open('data.txt', 'r') as f: data = f.read() return data async def main(): data = await read_data() print(data) if name == 'main': asyncio.run(main()) ```

Back-end developer

coroutines

event loop

Antoine Brennerat Dec 2, 2021

Hard

5 votes2087 runs0 comment

What is the difference between the `repr()` and `str()` methods in Python?

Back-end developer

methods

python

Anonymous authorat Mar 28, 2022

Hard

5 votes301 runs0 comment

Change the value of a nested list element in Python

Back-end developer

lists

nested lists

El Mehdiat Sep 4, 2023

Hard

4 votes2249 runs

1 comment

Write a Python function that returns a list of the first n numbers of the Fibonacci sequence.

Back-end developer

list comprehension

lambda

Antoine Brennerat Dec 2, 2021

Hard

4 votes2231 runs

1 comment

Write a Python code that will wait for 40 seconds.

Back-end developer

python

async

Antoine Brennerat Dec 2, 2021

Hard

4 votes2230 runs0 comment

Create a list of 10 elements in Python

Back-end developer

list

python

Antoine Brennerat Dec 2, 2021

Hard

4 votes2229 runs0 comment

What is the output of the following Python code? ``` G = '123' print(G + 1) ```

Back-end developer

python

type

Antoine Brennerat Dec 2, 2021

Hard

4 votes2217 runs0 comment

Python: Decorator that prevents the creation of an instance of a class

Back-end developer

decorators

inheritance

Antoine Brennerat Dec 2, 2021

Hard

4 votes1948 runs

2 comments

Write a Python function that returns a list of numbers divisible by 3 from 0 to 9.

Back-end developer

list

filter

Anonymous authorat Mar 28, 2022

Easy

4 votes1838 runs0 comment

Read a file in Python

Back-end developer

file

list

Anonymous authorat Mar 28, 2022

85 interview questions on Pythonfor developers (2025)

Test your technical skills before an interview of Python with 85 corrected questions. Beginner, Intermediate or Expert level.

Write a Python function that returns the factorial of a number.

Write a Python function that prints the elements of a list.

Use the zip() function to iterate over two lists in parallel.

Start a HTTP server from the CLI with python

What type is `function_a` in the following code ?

Why is the output of the following code undefined? ``` def f(n): return n + 1 f(n) ```

Find the word 'lazy' in a sentence using Python

What do `a^b`, `a|b` and `a-b` respectively represent in Python ?

In Python, what is the output of the following code? `valueA = 10; valueB = 10; valueA is valueB`

Write a Python program to open a file in binary mode and write a string to it.

What is the output of the following code? ``` import asyncio async def read_data(): with open('data.txt', 'r') as f: data = f.read() return data async def main(): data = await read_data() print(data) if name == 'main': asyncio.run(main()) ```

What is the difference between the `repr()` and `str()` methods in Python?

Change the value of a nested list element in Python

Write a Python function that returns a list of the first n numbers of the Fibonacci sequence.

Write a Python code that will wait for 40 seconds.

Create a list of 10 elements in Python

What is the output of the following Python code? ``` G = '123' print(G + 1) ```

Python: Decorator that prevents the creation of an instance of a class

Write a Python function that returns a list of numbers divisible by 3 from 0 to 9.

Read a file in Python

85 interview questions on Pythonfor developers (2025)

Test your technical skills before an interview of Python with 85 corrected questions. Beginner, Intermediate or Expert level.

Write a Python function that returns the factorial of a number.

Write a Python function that prints the elements of a list.

Use the zip() function to iterate over two lists in parallel.

Start a HTTP server from the CLI with python

What type is `function_a` in the following code ?

Why is the output of the following code undefined? ``` def f(n): return n + 1 f(n) ```

Find the word 'lazy' in a sentence using Python

What do `a^b`, `a|b` and `a-b` respectively represent in Python ?

In Python, what is the output of the following code? `valueA = 10; valueB = 10; valueA is valueB`

Write a Python program to open a file in binary mode and write a string to it.

What is the output of the following code? ``` import asyncio async def read_data(): with open('data.txt', 'r') as f: data = f.read() return data async def main(): data = await read_data() print(data) if __name__ == '__main__': asyncio.run(main()) ```

What is the difference between the `__repr__()` and `__str__()` methods in Python?

Change the value of a nested list element in Python

Write a Python function that returns a list of the first n numbers of the Fibonacci sequence.

Write a Python code that will wait for 40 seconds.

Create a list of 10 elements in Python

What is the output of the following Python code? ``` G = '123' print(G + 1) ```

Python: Decorator that prevents the creation of an instance of a class

Write a Python function that returns a list of numbers divisible by 3 from 0 to 9.

Read a file in Python

What is the output of the following code? ``` import asyncio async def read_data(): with open('data.txt', 'r') as f: data = f.read() return data async def main(): data = await read_data() print(data) if name == 'main': asyncio.run(main()) ```

What is the difference between the `repr()` and `str()` methods in Python?