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