DoorDash vs X Interview Questions
DoorDash lists 78 LeetCode interview questions while X lists 51. They share 9 problems — 12% of DoorDash's bank and 18% of X's. Focus on the overlap first, then drill into 69 DoorDash-only and 42 X-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 9 overlapping problems first. These are the highest-yield questions for candidates interviewing at both DoorDash and X.
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 X-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
9 Shared Questions
High-priority problems to practice for both DoorDash and X.
| Problem | Difficulty |
|---|---|
| Minimum Number of Steps to Make Two Strings Anagram | Medium |
| Implement Trie (Prefix Tree) | Medium |
| Best Meeting Point | Hard |
| Count Sub Islands | Medium |
| LRU Cache | Medium |
| Insert Delete GetRandom O(1) | Medium |
| Merge k Sorted Lists | Hard |
| Integer to Roman | Medium |
| Merge Intervals | Medium |
Unique to DoorDash (69)
Problems in DoorDash's list that do not appear at X.
Unique to X (42)
Problems in X's list that do not appear at DoorDash.
| Problem | Difficulty |
|---|---|
| Trapping Rain Water | Hard |
| Tweet Counts Per Frequency | Medium |
| Flatten Nested List Iterator | Medium |
| Design Twitter | Medium |
| Binary Gap | Easy |
| Regular Expression Matching | Hard |
| Word Break II | Hard |
| Alien Dictionary | Hard |
| Time Needed to Buy Tickets | Easy |
| Valid Parentheses | Easy |
| Max Points on a Line | Hard |
| Trapping Rain Water II | Hard |
Frequently Asked Questions
How many LeetCode questions do DoorDash and X share?
DoorDash and X share 9 LeetCode interview questions. 69 problems appear only in DoorDash's list and 42 appear only in X's list.
What topics overlap most between DoorDash and X?
The most common shared topics between DoorDash and X are Hash Table (5 shared questions), Array (4 shared questions), String (3 shared questions), Design (3 shared questions), Math (3 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: DoorDash or X?
DoorDash has 7 Easy, 45 Medium, and 26 Hard questions. X has 8 Easy, 31 Medium, and 12 Hard questions. DoorDash has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both DoorDash and X?
Start with the 9 shared problems since they cover what both companies ask most often. Then add 20 DoorDash-specific and 20 X-specific questions to round out your prep.