Python Interview Questions

Looking for Python interview questions?

Python is one of the most popular programming languages in the world and highly sought-after skills in the corporate world. There are numerous reasons that make it popular with users – it is immensely readable as it uses English keywords (instead of punctuation), has fewer syntactical constructions, portable, extensible, and open source. If you are appearing for a job interview for the profile of a Python developer, then you need to be ready to confidently answer any questions that the interviewer may ask. From basic concepts to advanced stuff, here is a list of 100 Python interview questions you should prepare for:

Q1. What’s the key difference a list and a tuple?

Q2. Define the key features of Python. Is it a programming language or a scripting language?

Q3. Explain how Python is an interpreted language.

Q4. What is Pep 8 used for in Python?

Q5. How does memory management work in Python?

Q6. What’s the significance of a namespace in Python?

Q7. What’s PythonPath and how do you access it?

Q8. What are Python modules? Which are the common built-in modules in Python?

Q9.  What are local variables and global variables in Python?

Q10. Is Python case sensitive? How do you ignore case in Python?

Q11. How is type conversion performed in Python?

Q12. What is indentation in Python and why is it important?

Q13. List a few differences between Python Arrays and lists.

Q14. What are functions in Python?

Q15. What do __init__ and ‘self’ do on Python?

Q16. What’s a lambda function in Python?

Q17. How do you use break, continue and pass statements?

Q18. What does [:-1] mean/do in python?

Q19. How do you randomize a list in Python?

Q20. What are python iterators and generators?

Q21. How do you generate a random number list in Python?

Q22. How do you write comments in Python?

Q23. Give an example of pickling and unpickling in Python.

Q24. How do you capitalize the first letter of a string?

Q25. How do you convert a string to lowercase?

Q26. What is the shortcut to comment multiple lines in Python?

Q27. What are docstrings in Python? Give some examples.

Q28. What are Membership and Identity Operators in Python?

Q29. What’s the use of help() and dir() function in Python?

Q30. Why isn’t all memory deallocated when Python exits?

Q31. How do you define a dictionary in Python?

Q32. What is the ternary operator in Python and how does it work?

Q33. What are *args and **kwargs in Python? Why would we use it?

Q34. How do you use the Len function in Excel?

Q35. Explain split(), sub(), subn() methods of “re” module in Python.

Q36. What are negative indexes and why are they used in Python?

Q37. What is meant by packages in Python?

Q38. How do you delete files in Python?

Q39. What are the four built-in numeric data types in Python?

Q40. What is the advantage of using NumPy arrays offer over (nested) Python lists?

Q41. How to declare, add and remove items to an array in Python?

Q42. Is Python an OOPs?

Q43. What’s the difference between shallow copy and deep copy in Python?

Q44. How do you achieve Multithreading in Python?

Q45. What is the process of compilation and linking in python?

Q46. Name a few Python libraries.

Q47. What’s the use of split in Python?

Q48. What is Inheritance in Python? Explain with an example.

Q49. How do you create classes in Python?

Q50. What is monkey patching? Explain with an example.

Q51. Are multiple inheritances supported in Python?

Q52. What is meant by polymorphism in Python?

Q53. What is meant by encapsulation in Python?

Q54. How do you declare an abstract class in Python?

Q55. Are access specifiers used in Python?

Q56. How do you create an empty class in Python?

Q57. What does an object() do?

Q58. Write a Python program to execute the Bubble sort algorithm.

Q59. Write a Python program to produce Star triangle.

Q60. Write a Python program to produce Fibonacci series in Python.

Q61. Write a Python program to check if a number is prime.

Q62. Write a Python program to check if a sequence is a Palindrome.

Q63. Write a one-line program to count the number of capital letters in a file. Your code should work even if the file is too big to fit in memory.

Q64. Write a sorting algorithm for a numerical dataset in Python?

Q65. What is Flask? What are its advantages?

Q66. What’s the difference between Django, Pyramid and Flask?

Q67. Explain the Django architecture. What do the different templates in Django consist of?

Q68. Discuss how you would set up the Database in Django.

Q69. How do you write a VIEW in Django? Explain with an example.

Q70. What’s the use of session in Django framework?

Q71. How do you save an Image locally whose URL Address you already know?

Q72. What’s the process of getting a Google cache age of any URL or web page?

Q73. What is map () in Python?

Q74. What are the advantages of NumPy over regular Python lists?

Q75. How to get indices of N maximum values in a NumPy array?

Q76. Are there any functional differences between NumPy and SciPy libraries in Python?

Q77. How do you find bugs or perform static analysis in a Python application?

Q78. What’s the process to monitor the code flow of a program in Python?

Q79. What’s the function of the yield keyword in Python?

Q80. What are the various ways to copy an object in Python?

Q81. What are some PDB commands to debug Python programs?

Q82. What is the syntax for list comprehension in Python?

Q83. How do you use dictionary comprehension in Python?

Q84. How do you use the Generator expression in Python?

Q85. What’s the function of the zip() method in Python?

Q86. What are Attributes and Methods in a Python class?

Q87. What is the difference between errors and exceptions?

Q88. What does it mean to raise an exception?

Q89. What does the chr() function do in Python?

Q90. What does the ord() function do in Python?

Q91. Explain what’s a Rstrip() in Python?

Q92. Which is the fastest package in Python?

Q93. What is GIL in Python?

Q94. How do you assign values for the Class attributes at runtime?

Q95. What are different ways to create an empty NumPy array in Python?

Q96. How is CPython different from Python?

Q97. How is exception handling in Python different than from Java? What are the different optional clauses for a “try-except” block in Python?

Q98. What’s the process to create a list with unique elements from a list with duplicate elements?

Q99. For Python 3.0 and later, what does the nonlocal statement do?

Q100. How do you make a chain of function decorators?


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