Common Python Interview Questions

1. What is Python?

• Python is a high-level, interpreted programming language known for its readability and versatility. It supports multiple programming paradigms, including procedural, object-oriented, and functional programming.

2. How is Python interpreted?

• Python code is executed line by line by the Python interpreter, making it an interpreted language. This means that Python does not need to be compiled before execution.

3. What are Python decorators?

• Decorators are a way to modify or extend the behavior of functions or methods without changing their actual code. They are usually defined with the @decorator_name syntax.

4. What is PEP 8?

• PEP 8 is the Python Enhancement Proposal that provides guidelines and best practices on how to write Python code. It helps maintain the readability and consistency of Python code.

5. Explain the difference between a list and a tuple.

• A list is mutable (can be changed), while a tuple is immutable (cannot be changed). Lists are defined using square brackets [], and tuples are defined using parentheses ().

6. **What are *args and kwargs?

• *args allows you to pass a variable number of non-keyword arguments to a function, while **kwargs allows you to pass a variable number of keyword arguments.

7. How do you handle exceptions in Python?

• Exceptions in Python can be handled using the try and except blocks. You can also use finally to execute code regardless of whether an exception occurred.

8. What is the difference between deep copy and shallow copy?

• A shallow copy creates a new object but inserts references into it to the objects found in the original. A deep copy creates a new object and recursively adds copies of nested objects found in the original.

9. How can you reverse a string in Python?

• You can reverse a string using slicing: reversed_string = original_string[::-1].

10. Write a Python program to check if a number is even or odd.

def is_even(num):
return num % 2 == 0
print(is_even(4))  # True
print(is_even(5))  # False