Epam Systems vs IBM Interview Questions
Epam Systems lists 46 LeetCode interview questions while IBM lists 115. They share 22 problems — 48% of Epam Systems's bank and 19% of IBM's. Focus on the overlap first, then drill into 24 Epam Systems-only and 93 IBM-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 22 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Epam Systems and IBM.
Step 2 — Company-specific depth: Add Epam Systems-specific problems like Minimum Operations to Make a Uni-Value Grid, Move Zeroes, Valid Anagram and IBM-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: IBM skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
22 Shared Questions
High-priority problems to practice for both Epam Systems and IBM.
| Problem | Difficulty |
|---|---|
| Two Sum | Easy |
| Longest Substring Without Repeating Characters | Medium |
| Valid Parentheses | Easy |
| Longest Common Prefix | Easy |
| Longest Palindromic Substring | Medium |
| Merge Sorted Array | Easy |
| Best Time to Buy and Sell Stock | Easy |
| Group Anagrams | Medium |
| Rotate Array | Medium |
| Partition Equal Subset Sum | Medium |
| Longest Consecutive Sequence | Medium |
| String Compression | Medium |
| Trapping Rain Water | Hard |
| 3Sum | Medium |
| Merge Intervals | Medium |
| Generate Parentheses | Medium |
| LRU Cache | Medium |
| Palindrome Number | Easy |
| Reverse Integer | Medium |
| Roman to Integer | Easy |
| Maximum Subarray | Medium |
| Median of Two Sorted Arrays | Hard |
Unique to Epam Systems (24)
Problems in Epam Systems's list that do not appear at IBM.
| Problem | Difficulty |
|---|---|
| Minimum Operations to Make a Uni-Value Grid | Medium |
| Move Zeroes | Easy |
| Valid Anagram | Easy |
| Reverse String | Easy |
| House Robber | Medium |
| Reverse Vowels of a String | Easy |
| First Unique Character in a String | Easy |
| Add Two Numbers | Medium |
| Maximum Difference Between Node and Ancestor | Medium |
| Pow(x, n) | Medium |
| Two Sum II - Input Array Is Sorted | Medium |
| Duplicate Emails | Easy |
Unique to IBM (93)
Problems in IBM's list that do not appear at Epam Systems.
Frequently Asked Questions
How many LeetCode questions do Epam Systems and IBM share?
Epam Systems and IBM share 22 LeetCode interview questions. 24 problems appear only in Epam Systems's list and 93 appear only in IBM's list.
What topics overlap most between Epam Systems and IBM?
The most common shared topics between Epam Systems and IBM are Array (13 shared questions), String (8 shared questions), Hash Table (6 shared questions), Two Pointers (6 shared questions), Dynamic Programming (6 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Epam Systems or IBM?
Epam Systems has 16 Easy, 27 Medium, and 3 Hard questions. IBM has 33 Easy, 73 Medium, and 9 Hard questions. IBM has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Epam Systems and IBM?
Start with the 22 shared problems since they cover what both companies ask most often. Then add 20 Epam Systems-specific and 20 IBM-specific questions to round out your prep.