DE Shaw vs MongoDB Interview Questions
DE Shaw lists 105 LeetCode interview questions while MongoDB lists 24. They share 3 problems — 3% of DE Shaw's bank and 13% of MongoDB's. Focus on the overlap first, then drill into 102 DE Shaw-only and 21 MongoDB-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 3 overlapping problems first. These are the highest-yield questions for candidates interviewing at both DE Shaw and MongoDB.
Step 2 — Company-specific depth: Add DE Shaw-specific problems like Binary Tree Cameras, Find Minimum Cost to Remove Array Elements, Maximum Number of Subsequences After One Inserting and MongoDB-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: DE Shaw skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
3 Shared Questions
High-priority problems to practice for both DE Shaw and MongoDB.
| Problem | Difficulty |
|---|---|
| Sliding Window Maximum | Hard |
| LRU Cache | Medium |
| Text Justification | Hard |
Unique to DE Shaw (102)
Problems in DE Shaw's list that do not appear at MongoDB.
Unique to MongoDB (21)
Problems in MongoDB's list that do not appear at DE Shaw.
| Problem | Difficulty |
|---|---|
| Word Break | Medium |
| Implement Trie (Prefix Tree) | Medium |
| Snapshot Array | Medium |
| Intersection of Two Arrays | Easy |
| Merge k Sorted Lists | Hard |
| Convert JSON String to Object | Hard |
| Merge Intervals | Medium |
| Insert Interval | Medium |
| Web Crawler Multithreaded | Medium |
| Stock Price Fluctuation | Medium |
| Course Schedule II | Medium |
| Merge Two Binary Trees | Easy |
Frequently Asked Questions
How many LeetCode questions do DE Shaw and MongoDB share?
DE Shaw and MongoDB share 3 LeetCode interview questions. 102 problems appear only in DE Shaw's list and 21 appear only in MongoDB's list.
What topics overlap most between DE Shaw and MongoDB?
The most common shared topics between DE Shaw and MongoDB are Array (2 shared questions), Queue (1 shared questions), Sliding Window (1 shared questions), Heap (Priority Queue) (1 shared questions), Monotonic Queue (1 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: DE Shaw or MongoDB?
DE Shaw has 11 Easy, 64 Medium, and 30 Hard questions. MongoDB has 3 Easy, 15 Medium, and 6 Hard questions. DE Shaw has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both DE Shaw and MongoDB?
Start with the 3 shared problems since they cover what both companies ask most often. Then add 20 DE Shaw-specific and 20 MongoDB-specific questions to round out your prep.