Python Interview Questions

Python Interview Questions

1. What is Python, and explain the key features of python?
2. What are variables and data types in Python?
3. How do you create a list in Python?
4. Can you explain the difference between a list and tuple?
5. How do you handle exceptions in Python?
6. What are Python dictionaries, and how do you use them?
7. Explain list comprehension and provide an example.
8. How do you define a function in Python?
9. What is the purpose of the ‘self-parameter’ in class methods?
10. What is the usage of List, Set, Tuple and Dictionary?
11. What are lambda functions?
12. What are the new operators which are present in the Python?
13. How do you work with files in Python?
14. What are Python modules and packages?
15. How do you implement inheritance in Python?
16. What are the built-in data types in Python?
17. How do you sort a list in Python?
18. What is the difference between ‘==’ and ‘is’?
19. What is mean by the virtual environment? Do you know how to create a virtual environment in Python?
20. What are iterators in Python, and how do you create?
21. How does Python's memory management work?
22. What is the purpose of the with statement?
23. What are some common built-in functions in Python?
24. What is multithreading, and how is it implemented in Python?
25. How do you optimize performance in Python applications?
26. What libraries do you use for data analysis in Python?
27. Explain the difference between Flask and Django.
28. What are Python list slicing techniques?
29. How can you reverse a string in Python?
30. Explain the difference between deep copy and shallow copy?
31. How do you merge two dictionaries in Python?
32. How would you remove duplicates from a list?
33. Find the factorial of a number using recursion?
34. Difference between mutable and immutable list.
35. What is a Numpy array?
36. How would you generate random numbers in python?
37. What does the ‘//’ operator do?
38. What is the purpose of ‘pass’ statement?
39. Explain some important functions of string?
40. What is the difference between del and remove() functions in list?
41. What is docstring in python?
42. Explain why python is a interpreted language.
43. What is slicing in python?
44. What are the keywords in python?
45. Is python a case sensitive?
46. Explain global and local variables in python
47. Is it necessary to indent in python?
48. What are the different python modules? Name some of the python built-in modules that are often used.
49. What is the lambda function?
50. Explain clearly the Oops concepts in python
51. Differentiate between Django, flask and pyramid
52. What is mean by PIP? Explain the usage of PIP.
53. Are access specifiers used in python?
54. Explain join() and split() functions in python.
55. What is init?
56. What is break, continue, pass in python?
 
Common Coding Questions

1. Reverse a String: Write a function that takes a string and returns it reversed.
2. Fibonacci Sequence: Write a function that returns the nth Fibonacci number.
3. Factorial: Write a function that returns the factorial of a given number.
4. Palindrome Check: Write a function that checks if a string is a palindrome or not.
5. Anagrams: Write a program to checks if the two strings are anagrams of each other or not.
6. Find the Largest Element: Write a program to find the largest element in a list without using the list functions.
7. Sum of Elements: Write a function that calculates the sum of all elements in a list.
8. Merge Sorted Lists: Write a function that merges two sorted lists into one sorted list.
9. Find Duplicates: Write a function that finds duplicates in a list.
10. Count Vowels: Write a function that counts the number of vowels in a given string.
11. Two Sum Problem: Write a program where array of integers are given, return the indices of the two numbers such that they add up to a specific target.
12. String Compression: Implement a program to perform basic string compression using the counts of repeated characters.
13. Rotate Array: Write a function that rotates an array to the right by a given number of steps.
14. Binary Search: Implement the binary search technique for an array, if it is not sorted first sort it.
15. Sorting Technique: Implement Sorting (Different Sorting Algorithms: Bubble Sort, Selection Sort, Insertion Sort, Merge Sort, Quicksort, Counting Sort, Radix Sort, Bucket Sort, Heap Sort, Shell Sort).
 
Algorithmic Problems
16. Find the Missing Number: Given an array of integers from 1 to n with one number missing, find the missing number in the given list.
17. Valid Parentheses: Write a program that checks if the parentheses in a string are valid.
18. Maximum Subarray Sum: Write a function that finds the contiguous subarray with the largest sum.
19. Kth Largest Element: Write a function that finds the kth largest element in an unsorted list.
20. Longest Common Prefix: Write a program to find the longest common prefix string among a given array of strings.