Python Interview Questions: 100+ Questions

Python Interview Questions: 100+ Questions!!!!!. Python has become one of the most popular programming languages in the world, known for its simplicity, versatility, and a vast ecosystem of libraries and frameworks. Whether you’re preparing for your first job interview or aiming to level up in your career, a strong grasp of Python’s core concepts, libraries, and advanced features is essential. This comprehensive list of over 100 Python interview questions covers topics ranging from basic syntax and data structures to object-oriented programming, libraries, file handling, and advanced techniques. Designed to test your knowledge and problem-solving skills, these questions will help you sharpen your expertise and confidently tackle your next Python interview.

Here’s a list of 100+ Python interview questions, covering various difficulty levels and topics such as basics, OOP, data structures, libraries, and advanced topics:

Basic Python Interview Questions

1. What is Python? List its key features.
2. Explain Python’s memory management system.
3. What are Python’s key data types?
4. What is the difference between list, tuple, and set?
5. How is Python interpreted?
6. Explain the difference between deepcopy and shallow copy.
7. What are Python’s mutable and immutable types?
8. Explain Python’s Global Interpreter Lock (GIL).
9. What are Python’s built-in data structures?
10. How is Python different from other programming languages like Java or C++?

Intermediate Python Interview Questions

11. How does Python handle type checking?
12. What are Python’s comprehensions? Provide examples.
13. Explain the concept of Python’s decorators.
14. How do you handle exceptions in Python?
15. What is the difference between is and == in Python?
16. Explain the difference between args and kwargs.
17. What is the purpose of the with statement in Python?
18. How do you manage Python packages and dependencies?
19. What is the difference between @staticmethod, @classmethod, and instance methods?
20. What are Python’s special methods (dunder methods)? Provide examples.

Object-Oriented Programming (OOP) in Python Interview Questions

21. Explain the key principles of OOP.
22. How do you implement inheritance in Python?
23. What is polymorphism? Provide an example.
24. Explain Python’s method resolution order (MRO).
25. What is the difference between an abstract class and an interface in Python?
26. What is the purpose of the super() function in Python?
27. How does multiple inheritance work in Python?
28. What is encapsulation, and how is it implemented in Python?
29. Explain how to override methods in Python.
30. What are Python metaclasses?

Data Structures and Algorithms in Python Interview Questions

31. How do you implement a stack in Python?
32. Write code to reverse a linked list.
33. How do you find the largest element in a list?
34. Explain the difference between del and remove in Python lists.
35. How is a dictionary implemented in Python?
36. Write code to find the second largest element in an array.
37. How do you sort a list in Python?
38. Explain the difference between sort() and sorted().
39. How do you check for duplicates in a list?
40. Write a Python function to implement binary search.

Python Standard Library Interview Questions

41. What is the purpose of the collections module? Provide examples.
42. How do you handle dates and times in Python?
43. What is the itertools module used for?
44. Explain the purpose of the os module in Python.
45. How do you serialize and deserialize data in Python?
46. What is the difference between json and pickle modules?
47. How do you generate random numbers in Python?
48. Explain the use of the math module in Python.
49. How do you work with regular expressions in Python?
50. What is the purpose of the sys module?

File Handling in Python Interview Questions

51. How do you read a file in Python?
52. What is the difference between r+, w+, and a+ modes?
53. Explain how you write data to a file in Python.
54. What are the advantages of using the with statement for file handling?
55. How do you handle CSV files in Python?
56. How can you read a large file efficiently in Python?
57. What is the purpose of the seek() method in file handling?
58. How do you check if a file exists in Python?
59. How do you list all files in a directory using Python?
60. What is the difference between binary and text files in Python?

Advanced Python Interview Questions

61. What are Python’s generators? How do they differ from iterators?
62. Explain the concept of Python’s closures.
63. How does Python manage memory for objects no longer in use?
64. What is monkey patching in Python?
65. Explain the concept of coroutines in Python.
66. What is the purpose of the async and await keywords?
67. How do you implement multithreading in Python?
68. How is multiprocessing different from multithreading in Python?
69. Explain the purpose of the __slots__ attribute in Python classes.
70. What are Python’s context managers?

Popular Libraries and Frameworks of Python

71. What is NumPy, and how is it used?
72. How do you create and manipulate a DataFrame in Pandas?
73. What is Matplotlib used for?
74. Explain how to create visualizations using Seaborn.
75. What is the purpose of Scikit-learn?
76. How do you train a machine learning model in Python?
77. What is TensorFlow, and how is it different from PyTorch?
78. Explain Flask vs Django for web development.
79. How do you create an API in Flask?
80. What is the purpose of the BeautifulSoup library?

Testing and Debugging Python Interview Questions

81. How do you debug a Python program?
82. What is the purpose of the unittest module in Python?
83. Explain how to write test cases using Pytest.
84. How do you mock functions during testing?
85. What is the purpose of the assert keyword in Python?
86. How do you handle logging in Python?
87. What is the purpose of the pdb module in Python?
88. Explain the difference between unit testing and integration testing.
89. How do you measure code performance in Python?
90. What tools are available for profiling Python code?

Database Interaction Python Interview Questions

91. How do you connect to a database in Python?
92. What is the purpose of the sqlite3 module in Python?
93. How do you execute queries using Python?
94. What is an ORM? Provide an example.
95. Explain how to use SQLAlchemy with Python.
96. How do you handle transactions in Python databases?
97. What is the difference between fetching one row and all rows in Python’s database operations?
98. How do you prevent SQL injection in Python?
99. What is the purpose of connection pooling?
100. How do you interact with NoSQL databases like MongoDB in Python?

Other Python Interview Questions

101. What is the purpose of virtual environments in Python?
102. How do you optimize Python code for performance?
103. What are Python’s best practices for writing clean and maintainable code?
104. What is the typing module, and why is it used?
105. Explain how Python achieves dynamic typing.
106. What is the difference between synchronous and asynchronous programming in Python?
107. How do you handle circular imports in Python?
108. Explain the use of the functools module.
109. How do you use the zip() function in Python?
110. What is duck typing in Python?

See Also

• TypeScript vs JavaScript: A Comprehensive Guide with Examples
• Setting Up TypeScript and Running Code
• A Detailed Guide to “Hello, World!” in TypeScript
• Binary Search in C: A Detailed Guide