MongoDB vs Pinterest Interview Questions
MongoDB lists 24 LeetCode interview questions while Pinterest lists 49. They share 3 problems — 13% of MongoDB's bank and 6% of Pinterest's. Focus on the overlap first, then drill into 21 MongoDB-only and 46 Pinterest-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 MongoDB and Pinterest.
Step 2 — Company-specific depth: Add MongoDB-specific problems like Word Break, Snapshot Array, Intersection of Two Arrays and Pinterest-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Pinterest 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 MongoDB and Pinterest.
| Problem | Difficulty |
|---|---|
| Implement Trie (Prefix Tree) | Medium |
| Design Search Autocomplete System | Hard |
| String Compression | Medium |
Unique to MongoDB (21)
Problems in MongoDB's list that do not appear at Pinterest.
| Problem | Difficulty |
|---|---|
| Word Break | Medium |
| Snapshot Array | Medium |
| Intersection of Two Arrays | Easy |
| Text Justification | Hard |
| Merge k Sorted Lists | Hard |
| LRU Cache | Medium |
| Convert JSON String to Object | Hard |
| Merge Intervals | Medium |
| Insert Interval | Medium |
| Web Crawler Multithreaded | Medium |
| Stock Price Fluctuation | Medium |
| Course Schedule II | Medium |
Unique to Pinterest (46)
Problems in Pinterest's list that do not appear at MongoDB.
Frequently Asked Questions
How many LeetCode questions do MongoDB and Pinterest share?
MongoDB and Pinterest share 3 LeetCode interview questions. 21 problems appear only in MongoDB's list and 46 appear only in Pinterest's list.
What topics overlap most between MongoDB and Pinterest?
The most common shared topics between MongoDB and Pinterest are String (3 shared questions), Design (2 shared questions), Trie (2 shared questions), Hash Table (1 shared questions), Depth-First Search (1 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: MongoDB or Pinterest?
MongoDB has 3 Easy, 15 Medium, and 6 Hard questions. Pinterest has 1 Easy, 29 Medium, and 19 Hard questions. Pinterest has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both MongoDB and Pinterest?
Start with the 3 shared problems since they cover what both companies ask most often. Then add 20 MongoDB-specific and 20 Pinterest-specific questions to round out your prep.