Lyft vs MongoDB Interview Questions
Lyft lists 26 LeetCode interview questions while MongoDB lists 24. They share 3 problems — 12% of Lyft's bank and 13% of MongoDB's. Focus on the overlap first, then drill into 23 Lyft-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 Lyft and MongoDB.
Step 2 — Company-specific depth: Add Lyft-specific problems like Rotting Oranges, Read N Characters Given read4 II - Call Multiple Times, Minimum Window Substring and MongoDB-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Lyft 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 Lyft and MongoDB.
| Problem | Difficulty |
|---|---|
| Time Based Key-Value Store | Medium |
| String Compression | Medium |
| Implement Trie (Prefix Tree) | Medium |
Unique to Lyft (23)
Problems in Lyft's list that do not appear at MongoDB.
| Problem | Difficulty |
|---|---|
| Rotting Oranges | Medium |
| Read N Characters Given read4 II - Call Multiple Times | Hard |
| Minimum Window Substring | Hard |
| Max Stack | Hard |
| Convert Sorted List to Binary Search Tree | Medium |
| Check Completeness of a Binary Tree | Medium |
| Car Pooling | Medium |
| Smallest Range Covering Elements from K Lists | Hard |
| Range Sum Query 2D - Immutable | Medium |
| Min Stack | Medium |
| Word Ladder II | Hard |
| Longest Consecutive Sequence | Medium |
Unique to MongoDB (21)
Problems in MongoDB's list that do not appear at Lyft.
| 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 |
Frequently Asked Questions
How many LeetCode questions do Lyft and MongoDB share?
Lyft and MongoDB share 3 LeetCode interview questions. 23 problems appear only in Lyft's list and 21 appear only in MongoDB's list.
What topics overlap most between Lyft and MongoDB?
The most common shared topics between Lyft and MongoDB are String (3 shared questions), Hash Table (2 shared questions), Design (2 shared questions), Binary Search (1 shared questions), Two Pointers (1 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Lyft or MongoDB?
Lyft has 0 Easy, 19 Medium, and 7 Hard questions. MongoDB has 3 Easy, 15 Medium, and 6 Hard questions. Lyft has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Lyft and MongoDB?
Start with the 3 shared problems since they cover what both companies ask most often. Then add 20 Lyft-specific and 20 MongoDB-specific questions to round out your prep.