36 interview questions on Python for developers (2025)

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nested lists

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list comprehension

Antoine Brennerat Dec 2, 2021

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36 interview questions on Pythonfor developers (2025)

Test your technical skills before an interview of Python with 36 corrected questions. Beginner, Intermediate or Expert level.

36 interview questions on Pythonfor developers (2025)

Test your technical skills before an interview of Python with 36 corrected questions. Beginner, Intermediate or Expert level.

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

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()) ```

In Python, which of the following statements are true about the keyword 'with':

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 class with a method that takes two arguments.

Explain the use of super in Python

What is the output of the following code? ``` print("\u0041") ```

Write a Python function that returns the sum of the first n integers.

Write a Python function that returns a copy of anotherlist with number appended to the end.

Define a class method in Python

What is the output of the following code? ``` def f(x): if x == 0: return 1 else: return f(x - 1) + f(x - 2) print(f(3)) ```

What is the value of valueA after the following code is executed? ``` valueA = 10 valueB = 20 valueA = valueB ```

Write a Python code that returns the first element of a list if the list is not empty, otherwise return None.

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()) ```