Apple vs DoorDash Interview Questions
Apple lists 300 LeetCode interview questions while DoorDash lists 78. They share 44 problems — 15% of Apple's bank and 56% of DoorDash's. Focus on the overlap first, then drill into 256 Apple-only and 34 DoorDash-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 44 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Apple and DoorDash.
Step 2 — Company-specific depth: Add Apple-specific problems like Best Time to Buy and Sell Stock, Design Hit Counter, Longest Common Prefix and DoorDash-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
44 Shared Questions
High-priority problems to practice for both Apple and DoorDash.
| Problem | Difficulty |
|---|---|
| LRU Cache | Medium |
| Two Sum | Easy |
| Number of Islands | Medium |
| Merge Intervals | Medium |
| Group Anagrams | Medium |
| Course Schedule II | Medium |
| Course Schedule | Medium |
| Merge k Sorted Lists | Hard |
| Insert Delete GetRandom O(1) | Medium |
| Basic Calculator II | Medium |
| Implement Trie (Prefix Tree) | Medium |
| Serialize and Deserialize Binary Tree | Hard |
| Longest Palindromic Substring | Medium |
| Find K Closest Elements | Medium |
| Jump Game | Medium |
| Sliding Window Maximum | Hard |
| Roman to Integer | Easy |
| Add Two Numbers | Medium |
| LFU Cache | Hard |
| Rotting Oranges | Medium |
| Brace Expansion | Medium |
| Binary Tree Vertical Order Traversal | Medium |
| Binary Tree Maximum Path Sum | Hard |
| Design Add and Search Words Data Structure | Medium |
| Maximum Path Quality of a Graph | Hard |
| Largest Rectangle in Histogram | Hard |
| Sudoku Solver | Hard |
| Basic Calculator | Hard |
| Design Browser History | Medium |
| Interval List Intersections | Medium |
Showing top 30 of 44 shared problems.
Unique to Apple (256)
Problems in Apple's list that do not appear at DoorDash.
| Problem | Difficulty |
|---|---|
| Best Time to Buy and Sell Stock | Easy |
| Design Hit Counter | Medium |
| Longest Common Prefix | Easy |
| Rotate Array | Medium |
| Reverse Linked List | Easy |
| Valid Sudoku | Medium |
| Top K Frequent Elements | Medium |
| Valid Parentheses | Easy |
| Longest Substring Without Repeating Characters | Medium |
| Product of Array Except Self | Medium |
| Valid Palindrome | Easy |
| Rotate Image | Medium |
Unique to DoorDash (34)
Problems in DoorDash's list that do not appear at Apple.
Frequently Asked Questions
How many LeetCode questions do Apple and DoorDash share?
Apple and DoorDash share 44 LeetCode interview questions. 256 problems appear only in Apple's list and 34 appear only in DoorDash's list.
What topics overlap most between Apple and DoorDash?
The most common shared topics between Apple and DoorDash are Array (14 shared questions), Hash Table (9 shared questions), String (9 shared questions), Design (7 shared questions), Depth-First Search (7 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Apple or DoorDash?
Apple has 76 Easy, 178 Medium, and 46 Hard questions. DoorDash has 7 Easy, 45 Medium, and 26 Hard questions. DoorDash has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Apple and DoorDash?
Start with the 44 shared problems since they cover what both companies ask most often. Then add 20 Apple-specific and 20 DoorDash-specific questions to round out your prep.