Google vs TCS Interview Questions
Google lists 2,305 LeetCode interview questions while TCS lists 228. They share 224 problems — 10% of Google's bank and 98% of TCS's. Focus on the overlap first, then drill into 2,081 Google-only and 4 TCS-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 224 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Google and TCS.
Step 2 — Company-specific depth: Add Google-specific problems like Merge Strings Alternately, Meeting Rooms II, Decode String and TCS-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Google skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
224 Shared Questions
High-priority problems to practice for both Google and TCS.
| Problem | Difficulty |
|---|---|
| Two Sum | Easy |
| Add Two Numbers | Medium |
| Trapping Rain Water | Hard |
| Median of Two Sorted Arrays | Hard |
| Longest Common Prefix | Easy |
| Palindrome Number | Easy |
| Merge Sorted Array | Easy |
| Longest Substring Without Repeating Characters | Medium |
| Best Time to Buy and Sell Stock | Easy |
| 3Sum | Medium |
| Create Hello World Function | Easy |
| Longest Palindromic Substring | Medium |
| Longest Consecutive Sequence | Medium |
| Container With Most Water | Medium |
| Recyclable and Low Fat Products | Easy |
| Valid Parentheses | Easy |
| Majority Element | Easy |
| Roman to Integer | Easy |
| Merge Intervals | Medium |
| Number of Islands | Medium |
| Maximum Subarray | Medium |
| Reverse Integer | Medium |
| Remove Duplicates from Sorted Array | Easy |
| Subarray Sum Equals K | Medium |
| Climbing Stairs | Easy |
| Merge Two Sorted Lists | Easy |
| Next Permutation | Medium |
| Generate Parentheses | Medium |
| Spiral Matrix | Medium |
| Reverse Linked List | Easy |
Showing top 30 of 224 shared problems.
Unique to Google (2,081)
Problems in Google's list that do not appear at TCS.
Unique to TCS (4)
Problems in TCS's list that do not appear at Google.
| Problem | Difficulty |
|---|---|
| Friday Purchases I | Medium |
| Minimum Operations to Exceed Threshold Value I | Easy |
| Palindrome Partitioning IV | Hard |
| Smallest Sufficient Team | Hard |
Frequently Asked Questions
How many LeetCode questions do Google and TCS share?
Google and TCS share 224 LeetCode interview questions. 2081 problems appear only in Google's list and 4 appear only in TCS's list.
What topics overlap most between Google and TCS?
The most common shared topics between Google and TCS are Array (17 shared questions), Two Pointers (7 shared questions), Hash Table (6 shared questions), Dynamic Programming (6 shared questions), String (6 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Google or TCS?
Google has 601 Easy, 1205 Medium, and 499 Hard questions. TCS has 99 Easy, 108 Medium, and 21 Hard questions. Google has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Google and TCS?
Start with the 224 shared problems since they cover what both companies ask most often. Then add 20 Google-specific and 4 TCS-specific questions to round out your prep.