DoorDash vs Waymo Interview Questions
DoorDash lists 78 LeetCode interview questions while Waymo lists 25. They share 6 problems — 8% of DoorDash's bank and 24% of Waymo's. Focus on the overlap first, then drill into 72 DoorDash-only and 19 Waymo-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 6 overlapping problems first. These are the highest-yield questions for candidates interviewing at both DoorDash and Waymo.
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 Waymo-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Waymo skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
6 Shared Questions
High-priority problems to practice for both DoorDash and Waymo.
| Problem | Difficulty |
|---|---|
| Shortest Distance from All Buildings | Hard |
| Largest Rectangle in Histogram | Hard |
| Number of Islands | Medium |
| Number of Visible People in a Queue | Hard |
| Maximum Gap | Medium |
| Range Sum Query 2D - Immutable | Medium |
Unique to DoorDash (72)
Problems in DoorDash's list that do not appear at Waymo.
| 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 |
| Single-Threaded CPU | Medium |
| Design File System | Medium |
| Check if One String Swap Can Make Strings Equal | Easy |
| Most Profit Assigning Work | Medium |
| Design In-Memory File System | Hard |
| Buddy Strings | Easy |
Unique to Waymo (19)
Problems in Waymo's list that do not appear at DoorDash.
| Problem | Difficulty |
|---|---|
| Max Points on a Line | Hard |
| Random Pick with Weight | Medium |
| Logger Rate Limiter | Easy |
| Meeting Rooms II | Medium |
| Minimum Number of Refueling Stops | Hard |
| Minimum Knight Moves | Medium |
| Minimum Area Rectangle | Medium |
| Design Excel Sum Formula | Hard |
| Design Tic-Tac-Toe | Medium |
| Divide Array in Sets of K Consecutive Numbers | Medium |
| Find Peak Element | Medium |
| Text Justification | Hard |
Frequently Asked Questions
How many LeetCode questions do DoorDash and Waymo share?
DoorDash and Waymo share 6 LeetCode interview questions. 72 problems appear only in DoorDash's list and 19 appear only in Waymo's list.
What topics overlap most between DoorDash and Waymo?
The most common shared topics between DoorDash and Waymo are Array (6 shared questions), Matrix (3 shared questions), Breadth-First Search (2 shared questions), Stack (2 shared questions), Monotonic Stack (2 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: DoorDash or Waymo?
DoorDash has 7 Easy, 45 Medium, and 26 Hard questions. Waymo has 1 Easy, 13 Medium, and 11 Hard questions. Waymo has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both DoorDash and Waymo?
Start with the 6 shared problems since they cover what both companies ask most often. Then add 20 DoorDash-specific and 19 Waymo-specific questions to round out your prep.