DoorDash vs Grammarly Interview Questions
DoorDash lists 78 LeetCode interview questions while Grammarly lists 30. They share 4 problems — 5% of DoorDash's bank and 13% of Grammarly's. Focus on the overlap first, then drill into 74 DoorDash-only and 26 Grammarly-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 4 overlapping problems first. These are the highest-yield questions for candidates interviewing at both DoorDash and Grammarly.
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 Grammarly-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
4 Shared Questions
High-priority problems to practice for both DoorDash and Grammarly.
| Problem | Difficulty |
|---|---|
| Implement Trie (Prefix Tree) | Medium |
| Number of Islands | Medium |
| Insert Delete GetRandom O(1) | Medium |
| Merge Intervals | Medium |
Unique to DoorDash (74)
Problems in DoorDash's list that do not appear at Grammarly.
Unique to Grammarly (26)
Problems in Grammarly's list that do not appear at DoorDash.
| Problem | Difficulty |
|---|---|
| Remove All Adjacent Duplicates In String | Easy |
| Search in Rotated Sorted Array | Medium |
| Vowel Spellchecker | Medium |
| Remove All Adjacent Duplicates in String II | Medium |
| Climbing Stairs | Easy |
| Repeated DNA Sequences | Medium |
| Sqrt(x) | Easy |
| Generate Parentheses | Medium |
| Perfect Number | Easy |
| Logger Rate Limiter | Easy |
| Sum of Left Leaves | Easy |
| Non-overlapping Intervals | Medium |
Frequently Asked Questions
How many LeetCode questions do DoorDash and Grammarly share?
DoorDash and Grammarly share 4 LeetCode interview questions. 74 problems appear only in DoorDash's list and 26 appear only in Grammarly's list.
What topics overlap most between DoorDash and Grammarly?
The most common shared topics between DoorDash and Grammarly are Array (3 shared questions), Hash Table (2 shared questions), Design (2 shared questions), String (1 shared questions), Trie (1 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: DoorDash or Grammarly?
DoorDash has 7 Easy, 45 Medium, and 26 Hard questions. Grammarly has 7 Easy, 19 Medium, and 4 Hard questions. DoorDash has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both DoorDash and Grammarly?
Start with the 4 shared problems since they cover what both companies ask most often. Then add 20 DoorDash-specific and 20 Grammarly-specific questions to round out your prep.