MongoDB vs Snapchat Interview Questions
MongoDB lists 24 LeetCode interview questions while Snapchat lists 99. They share 7 problems — 29% of MongoDB's bank and 7% of Snapchat's. Focus on the overlap first, then drill into 17 MongoDB-only and 92 Snapchat-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 7 overlapping problems first. These are the highest-yield questions for candidates interviewing at both MongoDB and Snapchat.
Step 2 — Company-specific depth: Add MongoDB-specific problems like Word Break, Implement Trie (Prefix Tree), Intersection of Two Arrays and Snapchat-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Snapchat skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
7 Shared Questions
High-priority problems to practice for both MongoDB and Snapchat.
| Problem | Difficulty |
|---|---|
| Snapshot Array | Medium |
| LRU Cache | Medium |
| Merge Intervals | Medium |
| Course Schedule II | Medium |
| String Compression | Medium |
| Search in Rotated Sorted Array | Medium |
| Word Break II | Hard |
Unique to MongoDB (17)
Problems in MongoDB's list that do not appear at Snapchat.
| Problem | Difficulty |
|---|---|
| Word Break | Medium |
| Implement Trie (Prefix Tree) | Medium |
| Intersection of Two Arrays | Easy |
| Text Justification | Hard |
| Merge k Sorted Lists | Hard |
| Convert JSON String to Object | Hard |
| Insert Interval | Medium |
| Web Crawler Multithreaded | Medium |
| Stock Price Fluctuation | Medium |
| Merge Two Binary Trees | Easy |
| Sliding Window Maximum | Hard |
| Lowest Common Ancestor of a Binary Tree | Medium |
Unique to Snapchat (92)
Problems in Snapchat's list that do not appear at MongoDB.
| Problem | Difficulty |
|---|---|
| Meeting Rooms II | Medium |
| Valid Sudoku | Medium |
| Sudoku Solver | Hard |
| Combination Sum | Medium |
| Combination Sum II | Medium |
| Wildcard Matching | Hard |
| Minimum Window Substring | Hard |
| Unique Binary Search Trees | Medium |
| Word Ladder | Hard |
| Reverse Words in a String | Medium |
| Min Stack | Medium |
| One Edit Distance | Medium |
Frequently Asked Questions
How many LeetCode questions do MongoDB and Snapchat share?
MongoDB and Snapchat share 7 LeetCode interview questions. 17 problems appear only in MongoDB's list and 92 appear only in Snapchat's list.
What topics overlap most between MongoDB and Snapchat?
The most common shared topics between MongoDB and Snapchat are Array (4 shared questions), Hash Table (3 shared questions), Binary Search (2 shared questions), Design (2 shared questions), String (2 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: MongoDB or Snapchat?
MongoDB has 3 Easy, 15 Medium, and 6 Hard questions. Snapchat has 6 Easy, 62 Medium, and 31 Hard questions. Snapchat has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both MongoDB and Snapchat?
Start with the 7 shared problems since they cover what both companies ask most often. Then add 17 MongoDB-specific and 20 Snapchat-specific questions to round out your prep.