MongoDB vs Twitter Interview Questions
MongoDB lists 24 LeetCode interview questions while Twitter lists 53. They share 5 problems — 21% of MongoDB's bank and 9% of Twitter's. Focus on the overlap first, then drill into 19 MongoDB-only and 48 Twitter-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 5 overlapping problems first. These are the highest-yield questions for candidates interviewing at both MongoDB and Twitter.
Step 2 — Company-specific depth: Add MongoDB-specific problems like Word Break, Snapshot Array, Intersection of Two Arrays and Twitter-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: MongoDB skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
5 Shared Questions
High-priority problems to practice for both MongoDB and Twitter.
| Problem | Difficulty |
|---|---|
| Implement Trie (Prefix Tree) | Medium |
| Merge k Sorted Lists | Hard |
| LRU Cache | Medium |
| Merge Intervals | Medium |
| Word Break II | Hard |
Unique to MongoDB (19)
Problems in MongoDB's list that do not appear at Twitter.
| Problem | Difficulty |
|---|---|
| Word Break | Medium |
| Snapshot Array | Medium |
| Intersection of Two Arrays | Easy |
| Text Justification | Hard |
| Convert JSON String to Object | Hard |
| Insert Interval | Medium |
| Web Crawler Multithreaded | Medium |
| Stock Price Fluctuation | Medium |
| Course Schedule II | Medium |
| Merge Two Binary Trees | Easy |
| Sliding Window Maximum | Hard |
| Lowest Common Ancestor of a Binary Tree | Medium |
Unique to Twitter (48)
Problems in Twitter's list that do not appear at MongoDB.
| Problem | Difficulty |
|---|---|
| Regular Expression Matching | Hard |
| Integer to Roman | Medium |
| Valid Parentheses | Easy |
| Trapping Rain Water | Hard |
| Multiply Strings | Medium |
| Wildcard Matching | Hard |
| Permutation Sequence | Hard |
| Pascal's Triangle | Easy |
| Time Needed to Buy Tickets | Easy |
| Max Points on a Line | Hard |
| One Edit Distance | Medium |
| Happy Number | Easy |
Frequently Asked Questions
How many LeetCode questions do MongoDB and Twitter share?
MongoDB and Twitter share 5 LeetCode interview questions. 19 problems appear only in MongoDB's list and 48 appear only in Twitter's list.
What topics overlap most between MongoDB and Twitter?
The most common shared topics between MongoDB and Twitter are Hash Table (3 shared questions), String (2 shared questions), Design (2 shared questions), Trie (2 shared questions), Linked List (2 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: MongoDB or Twitter?
MongoDB has 3 Easy, 15 Medium, and 6 Hard questions. Twitter has 8 Easy, 33 Medium, and 12 Hard questions. MongoDB has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both MongoDB and Twitter?
Start with the 5 shared problems since they cover what both companies ask most often. Then add 19 MongoDB-specific and 20 Twitter-specific questions to round out your prep.