Amazon vs Epam Systems Interview Questions
Amazon lists 1,968 LeetCode interview questions while Epam Systems lists 46. They share 46 problems — 2% of Amazon's bank and 100% of Epam Systems's. Focus on the overlap first, then drill into 1,922 Amazon-only and 0 Epam Systems-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 46 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Amazon and Epam Systems.
Step 2 — Company-specific depth: Add Amazon-specific problems like Number of Islands, Reorganize String, Container With Most Water and Epam Systems-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Amazon skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
46 Shared Questions
High-priority problems to practice for both Amazon and Epam Systems.
| Problem | Difficulty |
|---|---|
| Two Sum | Easy |
| LRU Cache | Medium |
| Trapping Rain Water | Hard |
| Longest Substring Without Repeating Characters | Medium |
| Best Time to Buy and Sell Stock | Easy |
| Group Anagrams | Medium |
| Add Two Numbers | Medium |
| 3Sum | Medium |
| Longest Palindromic Substring | Medium |
| Merge Intervals | Medium |
| Median of Two Sorted Arrays | Hard |
| Valid Parentheses | Easy |
| Longest Common Prefix | Easy |
| Merge Sorted Array | Easy |
| Top K Frequent Elements | Medium |
| Maximum Subarray | Medium |
| Longest Consecutive Sequence | Medium |
| Generate Parentheses | Medium |
| Palindrome Number | Easy |
| Merge Two Sorted Lists | Easy |
| House Robber | Medium |
| Valid Anagram | Easy |
| Kth Largest Element in an Array | Medium |
| Roman to Integer | Easy |
| Unique Paths | Medium |
| First Missing Positive | Hard |
| Move Zeroes | Easy |
| Reverse Integer | Medium |
| Rotate Array | Medium |
| Reverse Linked List | Easy |
Showing top 30 of 46 shared problems.
Unique to Amazon (1,922)
Problems in Amazon's list that do not appear at Epam Systems.
| Problem | Difficulty |
|---|---|
| Number of Islands | Medium |
| Reorganize String | Medium |
| Container With Most Water | Medium |
| Koko Eating Bananas | Medium |
| Course Schedule | Medium |
| Merge k Sorted Lists | Hard |
| Rotting Oranges | Medium |
| Subarray Sum Equals K | Medium |
| Search in Rotated Sorted Array | Medium |
| Copy List with Random Pointer | Medium |
| Lowest Common Ancestor of a Binary Tree | Medium |
| Word Ladder | Hard |
Unique to Epam Systems (0)
Problems in Epam Systems's list that do not appear at Amazon.
No exclusive Epam Systems problems to show.
Frequently Asked Questions
How many LeetCode questions do Amazon and Epam Systems share?
Amazon and Epam Systems share 46 LeetCode interview questions. 1922 problems appear only in Amazon's list and 0 appear only in Epam Systems's list.
What topics overlap most between Amazon and Epam Systems?
The most common shared topics between Amazon and Epam Systems are Array (17 shared questions), Hash Table (9 shared questions), String (8 shared questions), Dynamic Programming (7 shared questions), Sorting (7 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Amazon or Epam Systems?
Amazon has 527 Easy, 1074 Medium, and 367 Hard questions. Epam Systems has 16 Easy, 27 Medium, and 3 Hard questions. Amazon has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Amazon and Epam Systems?
Start with the 46 shared problems since they cover what both companies ask most often. Then add 20 Amazon-specific and 0 Epam Systems-specific questions to round out your prep.