85 interview questions on Python for developers (2025)

Easy

37 votes1963 runs1 comment

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

Back-end developer

recursion

Vincent Cotroat Mar 28, 2023

Hard

22 votes2348 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 votes2126 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 votes2387 runs0 comment

Start a HTTP server from the CLI with python

Back-end developer

cli

http

Anonymous authorat Jan 23, 2023

Easy

10 votes2100 runs0 comment

What type is `function_a` in the following code ?

Back-end developer

functions

decorators

Anonymous authorat Mar 28, 2022

Hard

8 votes2242 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

8 votes1977 runs0 comment

Find the word 'lazy' in a sentence using Python

Back-end developer

regex

python

Anonymous authorat Mar 28, 2022

Hard

6 votes2242 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

Medium

6 votes1996 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 votes2245 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 votes2244 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 votes2118 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 votes302 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 votes2262 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 votes2244 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 votes2244 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 votes2241 runs0 comment

Create a list of 10 elements in Python

Back-end developer

list

python

Antoine Brennerat Dec 2, 2021

Hard

4 votes2230 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 votes1971 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 votes1858 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 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 do `a^b`, `a|b` and `a-b` respectively represent in Python ?

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

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

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.

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

Write a Python code that will wait for 40 seconds.

Create a list of 10 elements in Python

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

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

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

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.

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

Write a Python code that will wait for 40 seconds.

Create a list of 10 elements in Python

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?