Airbnb vs MongoDB Interview Questions
Airbnb lists 63 LeetCode interview questions while MongoDB lists 24. They share 3 problems — 5% of Airbnb's bank and 13% of MongoDB's. Focus on the overlap first, then drill into 60 Airbnb-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 Airbnb and MongoDB.
Step 2 — Company-specific depth: Add Airbnb-specific problems like Maximum Profit in Job Scheduling, Flatten 2D Vector, Smallest Common Region and MongoDB-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Airbnb 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 Airbnb and MongoDB.
| Problem | Difficulty |
|---|---|
| Text Justification | Hard |
| Merge k Sorted Lists | Hard |
| Time Based Key-Value Store | Medium |
Unique to Airbnb (60)
Problems in Airbnb's list that do not appear at MongoDB.
| Problem | Difficulty |
|---|---|
| Maximum Profit in Job Scheduling | Hard |
| Flatten 2D Vector | Medium |
| Smallest Common Region | Medium |
| Palindrome Pairs | Hard |
| Maximum Candies You Can Get from Boxes | Hard |
| Pour Water | Medium |
| Sliding Puzzle | Hard |
| Design Excel Sum Formula | Hard |
| Intersection of Two Linked Lists | Easy |
| Trapping Rain Water | Hard |
| Alien Dictionary | Hard |
| Contains Duplicate II | Easy |
Unique to MongoDB (21)
Problems in MongoDB's list that do not appear at Airbnb.
| Problem | Difficulty |
|---|---|
| Word Break | Medium |
| Implement Trie (Prefix Tree) | Medium |
| Snapshot Array | Medium |
| Intersection of Two Arrays | Easy |
| 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 |
| Merge Two Binary Trees | Easy |
Frequently Asked Questions
How many LeetCode questions do Airbnb and MongoDB share?
Airbnb and MongoDB share 3 LeetCode interview questions. 60 problems appear only in Airbnb's list and 21 appear only in MongoDB's list.
What topics overlap most between Airbnb and MongoDB?
The most common shared topics between Airbnb and MongoDB are String (2 shared questions), Array (1 shared questions), Simulation (1 shared questions), Linked List (1 shared questions), Divide and Conquer (1 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Airbnb or MongoDB?
Airbnb has 11 Easy, 31 Medium, and 21 Hard questions. MongoDB has 3 Easy, 15 Medium, and 6 Hard questions. Airbnb has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Airbnb and MongoDB?
Start with the 3 shared problems since they cover what both companies ask most often. Then add 20 Airbnb-specific and 20 MongoDB-specific questions to round out your prep.