Python interview Question & Answer
1. What is Python?
Python is a high-level, interpreted, object-oriented programming language known for its simplicity and readability.
2. What are the advantages of Python?
- Easy syntax
- Platform independent
- Dynamically typed
- Large standard library
- Supports multiple programming paradigms
3. Is Python case-sensitive?
Yes, Python is case-sensitive.
4. What is PEP 8?
PEP 8 is the official Python coding style guideline.
5. What are keywords in Python?
Reserved words that have predefined meanings (e.g., if, else, for, while).
6. What are built-in data types in Python?
int, float, str, list, tuple, set, dict, bool
7. Difference between list and tuple?
|
List |
Tuple |
|
Mutable |
Immutable |
|
Slower |
Faster |
|
Uses [] |
Uses () |
8. What is a dictionary?
A collection of key-value pairs.
{"name": "Amit", "age": 22}
9. What is conditional statement?
Used to execute code based on conditions (if, elif, else).
10. What loops are available in Python?
- for loop
- while loop
11. What is break and continue?
- break exits the loop
- continue skips the current iteration
12. What is a function?
A reusable block of code.
13. What is return keyword?
Used to send value back from a function.
14. What is lambda function?
An anonymous single-line function.
lambda x: x * 2
15. What is OOP?
Programming based on objects and classes.
16. What are OOP concepts?
- Encapsulation
- Inheritance
- Polymorphism
- Abstraction
17. What is constructor?
A special method (__init__) used to initialize objects.
18. What is exception?
An error that occurs during program execution.
19. How do you handle exceptions?
try:
x = 10 / 0
except ZeroDivisionError:
print("Error")
20. What is generator?
A function that uses yield to return values one at a time.
21. What is decorator?
A function that modifies another function.
22. What is GIL?
Global Interpreter Lock ensures only one thread runs Python bytecode at a time.
23. What is multithreading?
Executing multiple threads concurrently.
24. How do you open a file?
open("data.txt", "r")
25. Difference between read() and readline()?
- read() reads entire file
- readline() reads one line
26. Difference between is and ==?
- is → memory comparison
- == → value comparison
27. What is pip?
Python package manager.
28. What is virtual environment?
Isolated Python environment for projects.
29. What is garbage collection?
Automatic memory management in Python.
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