Epam Systems vs TCS Interview Questions
Epam Systems lists 46 LeetCode interview questions while TCS lists 228. They share 38 problems — 83% of Epam Systems's bank and 17% of TCS's. Focus on the overlap first, then drill into 8 Epam Systems-only and 190 TCS-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 38 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Epam Systems and TCS.
Step 2 — Company-specific depth: Add Epam Systems-specific problems like Minimum Operations to Make a Uni-Value Grid, Reverse Vowels of a String, Maximum Difference Between Node and Ancestor and TCS-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: TCS skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
38 Shared Questions
High-priority problems to practice for both Epam Systems and TCS.
| Problem | Difficulty |
|---|---|
| Two Sum | Easy |
| Longest Substring Without Repeating Characters | Medium |
| Valid Parentheses | Easy |
| Move Zeroes | Easy |
| Longest Common Prefix | Easy |
| Longest Palindromic Substring | Medium |
| Merge Sorted Array | Easy |
| Valid Anagram | Easy |
| Best Time to Buy and Sell Stock | Easy |
| Group Anagrams | Medium |
| Rotate Array | Medium |
| Reverse String | Easy |
| House Robber | Medium |
| Partition Equal Subset Sum | Medium |
| Longest Consecutive Sequence | Medium |
| String Compression | Medium |
| Trapping Rain Water | Hard |
| 3Sum | Medium |
| First Unique Character in a String | Easy |
| Merge Intervals | Medium |
| Generate Parentheses | Medium |
| LRU Cache | Medium |
| Add Two Numbers | Medium |
| Palindrome Number | Easy |
| Reverse Integer | Medium |
| Pow(x, n) | Medium |
| Two Sum II - Input Array Is Sorted | Medium |
| Duplicate Emails | Easy |
| Roman to Integer | Easy |
| Maximum Subarray | Medium |
Showing top 30 of 38 shared problems.
Unique to Epam Systems (8)
Problems in Epam Systems's list that do not appear at TCS.
| Problem | Difficulty |
|---|---|
| Minimum Operations to Make a Uni-Value Grid | Medium |
| Reverse Vowels of a String | Easy |
| Maximum Difference Between Node and Ancestor | Medium |
| Count Salary Categories | Medium |
| Edit Distance | Medium |
| Counter | Easy |
| Sort Characters By Frequency | Medium |
| Kth Largest Element in an Array | Medium |
Unique to TCS (190)
Problems in TCS's list that do not appear at Epam Systems.
| Problem | Difficulty |
|---|---|
| Friday Purchases I | Medium |
| Majority Element | Easy |
| Sort Colors | Medium |
| Find the Index of the First Occurrence in a String | Easy |
| Single Number | Easy |
| Second Highest Salary | Medium |
| Subarray Sum Equals K | Medium |
| Container With Most Water | Medium |
| Remove Duplicates from Sorted Array | Easy |
| Jump Game | Medium |
| Contains Duplicate | Easy |
| Remove Letter To Equalize Frequency | Easy |
Frequently Asked Questions
How many LeetCode questions do Epam Systems and TCS share?
Epam Systems and TCS share 38 LeetCode interview questions. 8 problems appear only in Epam Systems's list and 190 appear only in TCS's list.
What topics overlap most between Epam Systems and TCS?
The most common shared topics between Epam Systems and TCS are Array (15 shared questions), String (11 shared questions), Two Pointers (9 shared questions), Hash Table (8 shared questions), Dynamic Programming (7 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Epam Systems or TCS?
Epam Systems has 16 Easy, 27 Medium, and 3 Hard questions. TCS has 99 Easy, 108 Medium, and 21 Hard questions. TCS has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Epam Systems and TCS?
Start with the 38 shared problems since they cover what both companies ask most often. Then add 8 Epam Systems-specific and 20 TCS-specific questions to round out your prep.