DoorDash vs Roblox Interview Questions
DoorDash lists 78 LeetCode interview questions while Roblox lists 56. They share 10 problems — 13% of DoorDash's bank and 18% of Roblox's. Focus on the overlap first, then drill into 68 DoorDash-only and 46 Roblox-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 10 overlapping problems first. These are the highest-yield questions for candidates interviewing at both DoorDash and Roblox.
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 Roblox-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
10 Shared Questions
High-priority problems to practice for both DoorDash and Roblox.
| Problem | Difficulty |
|---|---|
| Implement Trie (Prefix Tree) | Medium |
| Course Schedule II | Medium |
| Largest Rectangle in Histogram | Hard |
| Two Sum | Easy |
| Sliding Window Maximum | Hard |
| Course Schedule | Medium |
| Insert Delete GetRandom O(1) | Medium |
| Merge Intervals | Medium |
| Design Browser History | Medium |
| Rotting Oranges | Medium |
Unique to DoorDash (68)
Problems in DoorDash's list that do not appear at Roblox.
Unique to Roblox (46)
Problems in Roblox's list that do not appear at DoorDash.
| Problem | Difficulty |
|---|---|
| Candy Crush | Medium |
| Reorganize String | Medium |
| Number of Ways to Wear Different Hats to Each Other | Hard |
| Text Justification | Hard |
| Maximize Distance to Closest Person | Medium |
| Task Scheduler | Medium |
| Design Hit Counter | Medium |
| Design Search Autocomplete System | Hard |
| Integer to English Words | Hard |
| Count Number of Nice Subarrays | Medium |
| Group the People Given the Group Size They Belong To | Medium |
| Rotate Image | Medium |
Frequently Asked Questions
How many LeetCode questions do DoorDash and Roblox share?
DoorDash and Roblox share 10 LeetCode interview questions. 68 problems appear only in DoorDash's list and 46 appear only in Roblox's list.
What topics overlap most between DoorDash and Roblox?
The most common shared topics between DoorDash and Roblox are Array (7 shared questions), Hash Table (3 shared questions), Design (3 shared questions), Breadth-First Search (3 shared questions), Depth-First Search (2 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: DoorDash or Roblox?
DoorDash has 7 Easy, 45 Medium, and 26 Hard questions. Roblox has 8 Easy, 35 Medium, and 13 Hard questions. DoorDash has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both DoorDash and Roblox?
Start with the 10 shared problems since they cover what both companies ask most often. Then add 20 DoorDash-specific and 20 Roblox-specific questions to round out your prep.