Epam Systems vs Walmart Labs Interview Questions
Epam Systems lists 46 LeetCode interview questions while Walmart Labs lists 144. They share 27 problems — 59% of Epam Systems's bank and 19% of Walmart Labs's. Focus on the overlap first, then drill into 19 Epam Systems-only and 117 Walmart Labs-only questions.
Read the full Epam Systems vs Walmart Labs preparation guide →
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 27 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Epam Systems and Walmart Labs.
Step 2 — Company-specific depth: Add Epam Systems-specific problems like Minimum Operations to Make a Uni-Value Grid, Merge Sorted Array, Valid Anagram and Walmart Labs-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Walmart Labs skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
27 Shared Questions
High-priority problems to practice for both Epam Systems and Walmart Labs.
| 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 |
| Best Time to Buy and Sell Stock | Easy |
| Group Anagrams | Medium |
| Rotate Array | Medium |
| House Robber | Medium |
| Longest Consecutive Sequence | Medium |
| Trapping Rain Water | Hard |
| 3Sum | Medium |
| First Unique Character in a String | Easy |
| Merge Intervals | Medium |
| Generate Parentheses | Medium |
| LRU Cache | Medium |
| Reverse Integer | Medium |
| Pow(x, n) | Medium |
| Roman to Integer | Easy |
| Maximum Subarray | Medium |
| First Missing Positive | Hard |
| Edit Distance | Medium |
| Sort Characters By Frequency | Medium |
| Top K Frequent Elements | Medium |
| Kth Largest Element in an Array | Medium |
| Median of Two Sorted Arrays | Hard |
Unique to Epam Systems (19)
Problems in Epam Systems's list that do not appear at Walmart Labs.
| Problem | Difficulty |
|---|---|
| Minimum Operations to Make a Uni-Value Grid | Medium |
| Merge Sorted Array | Easy |
| Valid Anagram | Easy |
| Reverse String | Easy |
| Partition Equal Subset Sum | Medium |
| String Compression | Medium |
| Reverse Vowels of a String | Easy |
| Add Two Numbers | Medium |
| Palindrome Number | Easy |
| Maximum Difference Between Node and Ancestor | Medium |
| Two Sum II - Input Array Is Sorted | Medium |
| Duplicate Emails | Easy |
Unique to Walmart Labs (117)
Problems in Walmart Labs's list that do not appear at Epam Systems.
Frequently Asked Questions
How many LeetCode questions do Epam Systems and Walmart Labs share?
Epam Systems and Walmart Labs share 27 LeetCode interview questions. 19 problems appear only in Epam Systems's list and 117 appear only in Walmart Labs's list.
What topics overlap most between Epam Systems and Walmart Labs?
The most common shared topics between Epam Systems and Walmart Labs are Array (16 shared questions), Hash Table (10 shared questions), String (10 shared questions), Dynamic Programming (7 shared questions), Sorting (6 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Epam Systems or Walmart Labs?
Epam Systems has 16 Easy, 27 Medium, and 3 Hard questions. Walmart Labs has 22 Easy, 96 Medium, and 26 Hard questions. Walmart Labs has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Epam Systems and Walmart Labs?
Start with the 27 shared problems since they cover what both companies ask most often. Then add 19 Epam Systems-specific and 20 Walmart Labs-specific questions to round out your prep.