TCS vs Zeta Interview Questions
TCS lists 228 LeetCode interview questions while Zeta lists 30. They share 10 problems — 4% of TCS's bank and 33% of Zeta's. Focus on the overlap first, then drill into 218 TCS-only and 20 Zeta-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 10 overlapping problems first. These are the highest-yield questions for candidates interviewing at both TCS and Zeta.
Step 2 — Company-specific depth: Add TCS-specific problems like Friday Purchases I, Two Sum, Longest Palindromic Substring and Zeta-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Zeta skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
10 Shared Questions
High-priority problems to practice for both TCS and Zeta.
| Problem | Difficulty |
|---|---|
| Maximum Subarray | Medium |
| Longest Substring Without Repeating Characters | Medium |
| Median of Two Sorted Arrays | Hard |
| Task Scheduler | Medium |
| Trapping Rain Water | Hard |
| Merge Intervals | Medium |
| House Robber | Medium |
| Sliding Window Maximum | Hard |
| Maximal Rectangle | Hard |
| Distribute Coins in Binary Tree | Medium |
Unique to TCS (218)
Problems in TCS's list that do not appear at Zeta.
| Problem | Difficulty |
|---|---|
| Friday Purchases I | Medium |
| Two Sum | Easy |
| Longest Palindromic Substring | Medium |
| Palindrome Number | Easy |
| Move Zeroes | Easy |
| Majority Element | Easy |
| Longest Common Prefix | Easy |
| Best Time to Buy and Sell Stock | Easy |
| Sort Colors | Medium |
| Valid Anagram | Easy |
| Find the Index of the First Occurrence in a String | Easy |
| Single Number | Easy |
Unique to Zeta (20)
Problems in Zeta's list that do not appear at TCS.
| Problem | Difficulty |
|---|---|
| Apply Operations to Make Two Strings Equal | Medium |
| Split Array Largest Sum | Hard |
| Minimum Window Substring | Hard |
| Capacity To Ship Packages Within D Days | Medium |
| Palindrome Partitioning II | Hard |
| Remove Boxes | Hard |
| Next Greater Element II | Medium |
| Reverse Nodes in k-Group | Hard |
| Count Univalue Subtrees | Medium |
| Insert Delete GetRandom O(1) | Medium |
| Remove K Digits | Medium |
| Heaters | Medium |
Frequently Asked Questions
How many LeetCode questions do TCS and Zeta share?
TCS and Zeta share 10 LeetCode interview questions. 218 problems appear only in TCS's list and 20 appear only in Zeta's list.
What topics overlap most between TCS and Zeta?
The most common shared topics between TCS and Zeta are Array (8 shared questions), Dynamic Programming (4 shared questions), Divide and Conquer (2 shared questions), Hash Table (2 shared questions), Sliding Window (2 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: TCS or Zeta?
TCS has 99 Easy, 108 Medium, and 21 Hard questions. Zeta has 0 Easy, 20 Medium, and 10 Hard questions. Zeta has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both TCS and Zeta?
Start with the 10 shared problems since they cover what both companies ask most often. Then add 20 TCS-specific and 20 Zeta-specific questions to round out your prep.