All Infosys Coding Interview Questions
156 questions we track for Infosys, most frequently asked first. Practice any of them in the code editor and get AI feedback on your solution.
- Junior23% (36)
- Mid/Senior56% (87)
- Staff21% (33)
Questionspage 1 of 2
- Two Sum129 companiesJunior
- Add Two Numbers38 companiesMid/Senior
- Longest Substring Without Repeating Characters112 companiesMid/Senior
- Median of Two Sorted Arrays47 companiesStaff
- Longest Palindromic Substring76 companiesMid/Senior
- Zigzag Conversion19 companiesMid/Senior
- Reverse Integer26 companiesMid/Senior
- String to Integer (atoi)19 companiesMid/Senior
- Palindrome Number35 companiesJunior
- Regular Expression Matching27 companiesStaff
- Container With Most Water58 companiesMid/Senior
- Integer to Roman32 companiesMid/Senior
- Roman to Integer45 companiesJunior
- Longest Common Prefix57 companiesJunior
- 3Sum61 companiesMid/Senior
- 4Sum19 companiesMid/Senior
- Valid Parentheses119 companiesJunior
- Merge Two Sorted Lists40 companiesJunior
- Generate Parentheses40 companiesMid/Senior
- Reverse Nodes in k-Group28 companiesStaff
- Find the Index of the First Occurrence in a String17 companiesJunior
- Substring with Concatenation of All Words10 companiesStaff
- Next Permutation31 companiesMid/Senior
- Search in Rotated Sorted Array55 companiesMid/Senior
- Find First and Last Position of Element in Sorted Array31 companiesMid/Senior
- Combination Sum30 companiesMid/Senior
- Combination Sum II17 companiesMid/Senior
- Trapping Rain Water78 companiesStaff
- Wildcard Matching18 companiesStaff
- Rotate Image37 companiesMid/Senior
- Group Anagrams91 companiesMid/Senior
- Pow(x, n)23 companiesMid/Senior
- Maximum Subarray66 companiesMid/Senior
- Spiral Matrix53 companiesMid/Senior
- Merge Intervals109 companiesMid/Senior
- Sqrt(x)19 companiesJunior
- Climbing Stairs38 companiesJunior
- Edit Distance31 companiesMid/Senior
- Set Matrix Zeroes24 companiesMid/Senior
- Sort Colors37 companiesMid/Senior
- Minimum Window Substring34 companiesStaff
- Combinations7 companiesMid/Senior
- Subsets20 companiesMid/Senior
- Largest Rectangle in Histogram32 companiesStaff
- Merge Sorted Array38 companiesJunior
- Subsets II9 companiesMid/Senior
- Reverse Linked List II18 companiesMid/Senior
- Maximum Depth of Binary Tree16 companiesJunior
- Pascal's Triangle18 companiesJunior
- Triangle11 companiesMid/Senior
- Best Time to Buy and Sell Stock90 companiesJunior
- Best Time to Buy and Sell Stock II28 companiesMid/Senior
- Valid Palindrome44 companiesJunior
- Longest Consecutive Sequence40 companiesMid/Senior
- Gas Station27 companiesMid/Senior
- Candy23 companiesStaff
- Linked List Cycle25 companiesJunior
- Reorder List16 companiesMid/Senior
- Evaluate Reverse Polish Notation18 companiesMid/Senior
- Reverse Words in a String29 companiesMid/Senior
- Find Minimum in Rotated Sorted Array17 companiesMid/Senior
- Find Peak Element34 companiesMid/Senior
- Two Sum II - Input Array Is Sorted17 companiesMid/Senior
- Largest Number22 companiesMid/Senior
- Rotate Array28 companiesMid/Senior
- House Robber38 companiesMid/Senior
- Number of Islands81 companiesMid/Senior
- House Robber II19 companiesMid/Senior
- Kth Largest Element in an Array42 companiesMid/Senior
- Contains Duplicate21 companiesJunior
- Power of Two11 companiesJunior
- Palindrome Linked List16 companiesJunior
- Product of Array Except Self44 companiesMid/Senior
- Valid Anagram38 companiesJunior
- Add Digits10 companiesJunior
- Move Zeroes47 companiesJunior
- Longest Increasing Subsequence31 companiesMid/Senior
- Bulb Switcher9 companiesMid/Senior
- Coin Change42 companiesMid/Senior
- Odd Even Linked List12 companiesMid/Senior
- Reverse String15 companiesJunior
- Top K Frequent Elements52 companiesMid/Senior
- Intersection of Two Arrays18 companiesJunior
- Is Subsequence15 companiesJunior
- Split Array Largest Sum19 companiesStaff
- Delete Node in a BST11 companiesMid/Senior
- Fibonacci Number16 companiesJunior
- Longest Palindromic Subsequence14 companiesMid/Senior
- Contiguous Array14 companiesMid/Senior
- K-diff Pairs in an Array9 companiesMid/Senior
- Reverse String II7 companiesJunior
- Next Greater Element III13 companiesMid/Senior
- Subarray Sum Equals K46 companiesMid/Senior
- Delete Operation for Two Strings4 companiesMid/Senior
- Maximum Product of Three Numbers15 companiesJunior
- Find K Closest Elements19 companiesMid/Senior
- Binary Search12 companiesJunior
- Daily Temperatures31 companiesMid/Senior
- Reorganize String21 companiesMid/Senior
- Magic Squares In Grid5 companiesMid/Senior