DoorDash vs TikTok Interview Questions
DoorDash lists 78 LeetCode interview questions while TikTok lists 351. They share 45 problems — 58% of DoorDash's bank and 13% of TikTok's. Focus on the overlap first, then drill into 33 DoorDash-only and 306 TikTok-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 45 overlapping problems first. These are the highest-yield questions for candidates interviewing at both DoorDash and TikTok.
Step 2 — Company-specific depth: Add DoorDash-specific problems like Single-Threaded CPU, Design File System, Check if One String Swap Can Make Strings Equal and TikTok-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
45 Shared Questions
High-priority problems to practice for both DoorDash and TikTok.
| Problem | Difficulty |
|---|---|
| Walls and Gates | Medium |
| Longest Increasing Path in a Matrix | Hard |
| Binary Tree Maximum Path Sum | Hard |
| Search Suggestions System | Medium |
| Maximum Profit in Job Scheduling | Hard |
| Koko Eating Bananas | Medium |
| Shortest Distance from All Buildings | Hard |
| Design In-Memory File System | Hard |
| Find K Closest Elements | Medium |
| Making A Large Island | Hard |
| Basic Calculator III | Hard |
| Implement Trie (Prefix Tree) | Medium |
| Course Schedule II | Medium |
| 132 Pattern | Medium |
| Next Permutation | Medium |
| Largest Rectangle in Histogram | Hard |
| Basic Calculator | Hard |
| Max Area of Island | Medium |
| Minimum Size Subarray Sum | Medium |
| Two Sum | Easy |
| Basic Calculator II | Medium |
| Serialize and Deserialize Binary Tree | Hard |
| Longest Common Subsequence | Medium |
| Asteroid Collision | Medium |
| Word Search II | Hard |
| Sliding Window Maximum | Hard |
| Number of Islands | Medium |
| Minimize Malware Spread | Hard |
| Course Schedule | Medium |
| Jump Game | Medium |
Showing top 30 of 45 shared problems.
Unique to DoorDash (33)
Problems in DoorDash's list that do not appear at TikTok.
Unique to TikTok (306)
Problems in TikTok's list that do not appear at DoorDash.
| Problem | Difficulty |
|---|---|
| Longest Increasing Subsequence | Medium |
| Longest Substring Without Repeating Characters | Medium |
| Number of Distinct Islands | Medium |
| Meeting Rooms II | Medium |
| Trapping Rain Water | Hard |
| Subarray With Elements Greater Than Varying Threshold | Hard |
| Text Justification | Hard |
| Decode String | Medium |
| Word Search | Medium |
| N-Queens | Hard |
| Minimum Window Substring | Hard |
| Search in Rotated Sorted Array | Medium |
Frequently Asked Questions
How many LeetCode questions do DoorDash and TikTok share?
DoorDash and TikTok share 45 LeetCode interview questions. 33 problems appear only in DoorDash's list and 306 appear only in TikTok's list.
What topics overlap most between DoorDash and TikTok?
The most common shared topics between DoorDash and TikTok are Array (20 shared questions), Breadth-First Search (10 shared questions), Depth-First Search (9 shared questions), String (9 shared questions), Matrix (7 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: DoorDash or TikTok?
DoorDash has 7 Easy, 45 Medium, and 26 Hard questions. TikTok has 34 Easy, 245 Medium, and 72 Hard questions. DoorDash has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both DoorDash and TikTok?
Start with the 45 shared problems since they cover what both companies ask most often. Then add 20 DoorDash-specific and 20 TikTok-specific questions to round out your prep.