MongoDB vs Zenefits Interview Questions
MongoDB lists 24 LeetCode interview questions while Zenefits lists 21. They share 3 problems — 13% of MongoDB's bank and 14% of Zenefits's. Focus on the overlap first, then drill into 21 MongoDB-only and 18 Zenefits-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 Zenefits.
Step 2 — Company-specific depth: Add MongoDB-specific problems like Word Break, Implement Trie (Prefix Tree), Snapshot Array and Zenefits-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
3 Shared Questions
High-priority problems to practice for both MongoDB and Zenefits.
| Problem | Difficulty |
|---|---|
| LRU Cache | Medium |
| Course Schedule II | Medium |
| Sliding Window Maximum | Hard |
Unique to MongoDB (21)
Problems in MongoDB's list that do not appear at Zenefits.
| Problem | Difficulty |
|---|---|
| Word Break | Medium |
| Implement Trie (Prefix Tree) | Medium |
| Snapshot Array | Medium |
| Intersection of Two Arrays | Easy |
| Text Justification | Hard |
| Merge k Sorted Lists | Hard |
| Convert JSON String to Object | Hard |
| Merge Intervals | Medium |
| Insert Interval | Medium |
| Web Crawler Multithreaded | Medium |
| Stock Price Fluctuation | Medium |
| Merge Two Binary Trees | Easy |
Unique to Zenefits (18)
Problems in Zenefits's list that do not appear at MongoDB.
| Problem | Difficulty |
|---|---|
| Median of Two Sorted Arrays | Hard |
| Graph Valid Tree | Medium |
| Number of Islands | Medium |
| Reverse Linked List | Easy |
| Course Schedule | Medium |
| Valid Parentheses | Easy |
| Generate Parentheses | Medium |
| Min Stack | Medium |
| Majority Element II | Medium |
| Excel Sheet Column Title | Easy |
| Majority Element | Easy |
| Trapping Rain Water | Hard |
Frequently Asked Questions
How many LeetCode questions do MongoDB and Zenefits share?
MongoDB and Zenefits share 3 LeetCode interview questions. 21 problems appear only in MongoDB's list and 18 appear only in Zenefits's list.
What topics overlap most between MongoDB and Zenefits?
The most common shared topics between MongoDB and Zenefits are Hash Table (1 shared questions), Linked List (1 shared questions), Design (1 shared questions), Doubly-Linked List (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 Zenefits?
MongoDB has 3 Easy, 15 Medium, and 6 Hard questions. Zenefits has 5 Easy, 11 Medium, and 5 Hard questions. MongoDB has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both MongoDB and Zenefits?
Start with the 3 shared problems since they cover what both companies ask most often. Then add 20 MongoDB-specific and 18 Zenefits-specific questions to round out your prep.