DoorDash vs Epam Systems Interview Questions
DoorDash lists 78 LeetCode interview questions while Epam Systems lists 46. They share 7 problems — 9% of DoorDash's bank and 15% of Epam Systems's. Focus on the overlap first, then drill into 71 DoorDash-only and 39 Epam Systems-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 7 overlapping problems first. These are the highest-yield questions for candidates interviewing at both DoorDash and Epam Systems.
Step 2 — Company-specific depth: Add DoorDash-specific problems like Walls and Gates, Longest Increasing Path in a Matrix, Binary Tree Maximum Path Sum and Epam Systems-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: DoorDash skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
7 Shared Questions
High-priority problems to practice for both DoorDash and Epam Systems.
| Problem | Difficulty |
|---|---|
| Two Sum | Easy |
| LRU Cache | Medium |
| Merge Intervals | Medium |
| Group Anagrams | Medium |
| Longest Palindromic Substring | Medium |
| Roman to Integer | Easy |
| Add Two Numbers | Medium |
Unique to DoorDash (71)
Problems in DoorDash's list that do not appear at Epam Systems.
Unique to Epam Systems (39)
Problems in Epam Systems's list that do not appear at DoorDash.
| Problem | Difficulty |
|---|---|
| Longest Substring Without Repeating Characters | Medium |
| Minimum Operations to Make a Uni-Value Grid | Medium |
| Valid Parentheses | Easy |
| Move Zeroes | Easy |
| Longest Common Prefix | Easy |
| Merge Sorted Array | Easy |
| Valid Anagram | Easy |
| Best Time to Buy and Sell Stock | Easy |
| Rotate Array | Medium |
| Reverse String | Easy |
| House Robber | Medium |
| Partition Equal Subset Sum | Medium |
Frequently Asked Questions
How many LeetCode questions do DoorDash and Epam Systems share?
DoorDash and Epam Systems share 7 LeetCode interview questions. 71 problems appear only in DoorDash's list and 39 appear only in Epam Systems's list.
What topics overlap most between DoorDash and Epam Systems?
The most common shared topics between DoorDash and Epam Systems are Hash Table (4 shared questions), Array (3 shared questions), String (3 shared questions), Linked List (2 shared questions), Sorting (2 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: DoorDash or Epam Systems?
DoorDash has 7 Easy, 45 Medium, and 26 Hard questions. Epam Systems has 16 Easy, 27 Medium, and 3 Hard questions. DoorDash has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both DoorDash and Epam Systems?
Start with the 7 shared problems since they cover what both companies ask most often. Then add 20 DoorDash-specific and 20 Epam Systems-specific questions to round out your prep.