Infosys logo

Infosys DSA Interview Questions

Crack the Infosys recruitment rounds with this definitive, high-yield DSA preparation sheet containing 72 highly repeated coding questions aggregated from recent InfyTQ, HackWithInfy, and DSE/SP national hiring drives. Infosys' technical screening assessments place a high emphasis on array logic filtering, mathematical string patterns, modular recursion transformations, and structural greedy allocations. Use this production-grade, cleanly shuffled dataset—equipped with direct LeetCode and GeeksforGeeks links—to significantly boost user engagement, session duration, and organic search ranking metrics on your prep platform.

72 Problems
0%

Overall Progress

0/72

1. Valid Palindrome
LeetCode•
•
Very Hot
2. Climbing Stairs
LeetCode•
•
Very Hot
3. Fibonacci Number
LeetCode•
•
Hot
4. Maximum Subarray
LeetCode•
•
Very Hot
5. Two Sum
LeetCode•
•
Very Hot
6. Valid Parentheses
LeetCode•
•
Very Hot
7. Majority Element
LeetCode•
•
Hot
8. Best Time to Buy and Sell Stock
LeetCode•
•
Very Hot
9. Valid Anagram
LeetCode•
•
Hot
10. Longest Common Prefix
LeetCode•
•
Hot
11. Missing Number
LeetCode•
•
Hot
12. Single Number
LeetCode•
•
Very Hot
13. Reverse Linked List
LeetCode•
•
Very Hot
14. Merge Two Sorted Lists
LeetCode•
•
Hot
15. Pascal's Triangle
LeetCode•
•
Hot
16. Search Insert Position
LeetCode•
•
Hot
17. Contains Duplicate
LeetCode•
•
Very Hot
18. Binary Search
LeetCode•
•
Very Hot
19. Find the Index of the First Occurrence in a String
LeetCode•
•
Hot
20. Search a 2D Matrix
LeetCode•
•
Very Hot
21. Container With Most Water
LeetCode•
•
Hot
22. Product of Array Except Self
LeetCode•
•
Hot
23. Subarray Sum Equals K
LeetCode•
•
Hot
24. Group Anagrams
LeetCode•
•
Warm
25. Longest Substring Without Repeating Characters
LeetCode•
•
Very Hot
26. Number of Islands
LeetCode•
•
Very Hot
27. Rotting Oranges
LeetCode•
•
Very Hot
28. Spiral Matrix
LeetCode•
•
Hot
29. Sort Colors
LeetCode•
•
Hot
30. Coin Change
LeetCode•
•
Very Hot
31. House Robber
LeetCode•
•
Hot
32. Longest Consecutive Sequence
LeetCode•
•
Hot
33. Word Break
LeetCode•
•
Warm
34. Permutations
LeetCode•
•
Warm
35. Subsets
LeetCode•
•
Warm
36. 3Sum
LeetCode•
•
Hot
37. Min Stack
LeetCode•
•
Hot
38. Merge Intervals
LeetCode•
•
Hot
39. Meeting Rooms
GeeksforGeeks•
•
Hot
40. Check if a Binary Tree is BST
LeetCode•
•
Hot
41. Lowest Common Ancestor of a Binary Tree
LeetCode•
•
Hot
42. Maximum Depth of Binary Tree
LeetCode•
•
Hot
43. Inorder Traversal of Binary Tree
LeetCode•
•
Warm
44. Symmetric Tree
LeetCode•
•
Warm
45. Gas Station
LeetCode•
•
Warm
46. Next Permutation
LeetCode•
•
Warm
47. Find the Duplicate Number
LeetCode•
•
Hot
48. Search in Rotated Sorted Array
LeetCode•
•
Very Hot
49. Is Subsequence
LeetCode•
•
Hot
50. Find Peak Element
LeetCode•
•
Hot
51. Shortest Path in a Binary Maze
GeeksforGeeks•
•
Hot
52. Count Primes
LeetCode•
•
Very Hot
53. Maximum Product Subarray
LeetCode•
•
Hot
54. Longest Palindromic Substring
LeetCode•
•
Very Hot
55. Valid Sudoku
LeetCode•
•
Hot
56. Jump Game
LeetCode•
•
Very Hot
57. Kth Smallest Element in a BST
LeetCode•
•
Hot
58. Unique Paths
LeetCode•
•
Hot
59. Set Matrix Zeroes
LeetCode•
•
Hot
60. Word Search
LeetCode•
•
Warm
61. Rotate Image
LeetCode•
•
Hot
62. Remove Duplicates from Sorted Array
LeetCode•
•
Very Hot
63. Implement Queue using Stacks
LeetCode•
•
Warm
64. Flatten Binary Tree to Linked List
LeetCode•
•
Warm
65. Binary Tree Zigzag Level Order Traversal
LeetCode•
•
Hot
66. Longest Palindromic Subsequence
LeetCode•
•
Warm
67. Edit Distance
LeetCode•
•
Hot
68. Network Delay Time
LeetCode•
•
Warm
69. Generate Parentheses
LeetCode•
•
Hot
70. Minimum Path Sum
LeetCode•
•
Hot
71. Excel Sheet Column Number
LeetCode•
•
Warm
72. Knapsack Problem (0/1 standard archetype)
GeeksforGeeks•
•
Very Hot