Infosys vs TCS Interview Questions
Infosys lists 105 LeetCode interview questions while TCS lists 228. They share 62 problems — 59% of Infosys's bank and 27% of TCS's. Focus on the overlap first, then drill into 43 Infosys-only and 166 TCS-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 62 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Infosys and TCS.
Step 2 — Company-specific depth: Add Infosys-specific problems like Maximum Good Subtree Score, Find Building Where Alice and Bob Can Meet, Minimum Reverse Operations and TCS-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Infosys skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
62 Shared Questions
High-priority problems to practice for both Infosys and TCS.
| Problem | Difficulty |
|---|---|
| Two Sum | Easy |
| Longest Substring Without Repeating Characters | Medium |
| Best Time to Buy and Sell Stock | Easy |
| Valid Parentheses | Easy |
| Merge Sorted Array | Easy |
| Next Permutation | Medium |
| Palindrome Number | Easy |
| Remove Duplicates from Sorted Array | Easy |
| Maximum Subarray | Medium |
| Reverse String | Easy |
| Valid Anagram | Easy |
| Second Highest Salary | Medium |
| Rotate Image | Medium |
| Trapping Rain Water | Hard |
| Product of Array Except Self | Medium |
| Longest Common Prefix | Easy |
| Merge Intervals | Medium |
| Generate Parentheses | Medium |
| Spiral Matrix | Medium |
| Rotate Array | Medium |
| Reverse Integer | Medium |
| 3Sum | Medium |
| Fibonacci Number | Easy |
| Group Anagrams | Medium |
| Set Matrix Zeroes | Medium |
| Linked List Cycle II | Medium |
| Move Zeroes | Easy |
| Reverse Words in a String | Medium |
| Two Sum II - Input Array Is Sorted | Medium |
| Add Two Numbers | Medium |
Showing top 30 of 62 shared problems.
Unique to Infosys (43)
Problems in Infosys's list that do not appear at TCS.
Unique to TCS (166)
Problems in TCS's list that do not appear at Infosys.
| Problem | Difficulty |
|---|---|
| Friday Purchases I | Medium |
| Majority Element | Easy |
| Sort Colors | Medium |
| Single Number | Easy |
| Contains Duplicate | Easy |
| Remove Letter To Equalize Frequency | Easy |
| Maximum Ascending Subarray Sum | Easy |
| Count the Digits That Divide a Number | Easy |
| Maximum Product Subarray | Medium |
| Task Scheduler | Medium |
| Check if Array Is Sorted and Rotated | Easy |
| Zigzag Grid Traversal With Skip | Easy |
Frequently Asked Questions
How many LeetCode questions do Infosys and TCS share?
Infosys and TCS share 62 LeetCode interview questions. 43 problems appear only in Infosys's list and 166 appear only in TCS's list.
What topics overlap most between Infosys and TCS?
The most common shared topics between Infosys and TCS are Array (17 shared questions), Two Pointers (11 shared questions), String (8 shared questions), Hash Table (6 shared questions), Math (6 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Infosys or TCS?
Infosys has 32 Easy, 57 Medium, and 16 Hard questions. TCS has 99 Easy, 108 Medium, and 21 Hard questions. Infosys has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Infosys and TCS?
Start with the 62 shared problems since they cover what both companies ask most often. Then add 20 Infosys-specific and 20 TCS-specific questions to round out your prep.