MongoDB vs PayPal Interview Questions
MongoDB lists 24 LeetCode interview questions while PayPal lists 105. They share 5 problems — 21% of MongoDB's bank and 5% of PayPal's. Focus on the overlap first, then drill into 19 MongoDB-only and 100 PayPal-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 PayPal.
Step 2 — Company-specific depth: Add MongoDB-specific problems like Word Break, Implement Trie (Prefix Tree), Snapshot Array and PayPal-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 PayPal.
| Problem | Difficulty |
|---|---|
| Text Justification | Hard |
| LRU Cache | Medium |
| Merge Intervals | Medium |
| Insert Interval | Medium |
| Search in Rotated Sorted Array | Medium |
Unique to MongoDB (19)
Problems in MongoDB's list that do not appear at PayPal.
| Problem | Difficulty |
|---|---|
| Word Break | Medium |
| Implement Trie (Prefix Tree) | Medium |
| Snapshot Array | Medium |
| Intersection of Two Arrays | Easy |
| Merge k Sorted Lists | Hard |
| Convert JSON String to Object | Hard |
| 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 PayPal (100)
Problems in PayPal's list that do not appear at MongoDB.
Frequently Asked Questions
How many LeetCode questions do MongoDB and PayPal share?
MongoDB and PayPal share 5 LeetCode interview questions. 19 problems appear only in MongoDB's list and 100 appear only in PayPal's list.
What topics overlap most between MongoDB and PayPal?
The most common shared topics between MongoDB and PayPal are Array (4 shared questions), String (1 shared questions), Simulation (1 shared questions), Hash Table (1 shared questions), Linked List (1 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: MongoDB or PayPal?
MongoDB has 3 Easy, 15 Medium, and 6 Hard questions. PayPal has 19 Easy, 69 Medium, and 17 Hard questions. MongoDB has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both MongoDB and PayPal?
Start with the 5 shared problems since they cover what both companies ask most often. Then add 19 MongoDB-specific and 20 PayPal-specific questions to round out your prep.