Databricks vs MongoDB Interview Questions
Databricks lists 31 LeetCode interview questions while MongoDB lists 24. They share 4 problems — 13% of Databricks's bank and 17% of MongoDB's. Focus on the overlap first, then drill into 27 Databricks-only and 20 MongoDB-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 4 overlapping problems first. These are the highest-yield questions for candidates interviewing at both Databricks and MongoDB.
Step 2 — Company-specific depth: Add Databricks-specific problems like Design Hit Counter, IP to CIDR, Design Tic-Tac-Toe and MongoDB-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
4 Shared Questions
High-priority problems to practice for both Databricks and MongoDB.
| Problem | Difficulty |
|---|---|
| Time Based Key-Value Store | Medium |
| Snapshot Array | Medium |
| Text Justification | Hard |
| Merge Intervals | Medium |
Unique to Databricks (27)
Problems in Databricks's list that do not appear at MongoDB.
| Problem | Difficulty |
|---|---|
| Design Hit Counter | Medium |
| IP to CIDR | Medium |
| Design Tic-Tac-Toe | Medium |
| House Robber | Medium |
| Find All Anagrams in a String | Medium |
| Step-By-Step Directions From a Binary Tree Node to Another | Medium |
| House Robber II | Medium |
| RLE Iterator | Medium |
| Longest Palindrome by Concatenating Two Letter Words | Medium |
| Closest Leaf in a Binary Tree | Medium |
| Shortest Path in a Grid with Obstacles Elimination | Hard |
| Number of Recent Calls | Easy |
Unique to MongoDB (20)
Problems in MongoDB's list that do not appear at Databricks.
| Problem | Difficulty |
|---|---|
| Word Break | Medium |
| Implement Trie (Prefix Tree) | Medium |
| Intersection of Two Arrays | Easy |
| Merge k Sorted Lists | Hard |
| LRU Cache | Medium |
| Convert JSON String to Object | Hard |
| Insert Interval | Medium |
| Web Crawler Multithreaded | Medium |
| Stock Price Fluctuation | Medium |
| Course Schedule II | Medium |
| Merge Two Binary Trees | Easy |
| Sliding Window Maximum | Hard |
Frequently Asked Questions
How many LeetCode questions do Databricks and MongoDB share?
Databricks and MongoDB share 4 LeetCode interview questions. 27 problems appear only in Databricks's list and 20 appear only in MongoDB's list.
What topics overlap most between Databricks and MongoDB?
The most common shared topics between Databricks and MongoDB are Array (3 shared questions), Hash Table (2 shared questions), String (2 shared questions), Binary Search (2 shared questions), Design (2 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Databricks or MongoDB?
Databricks has 2 Easy, 22 Medium, and 7 Hard questions. MongoDB has 3 Easy, 15 Medium, and 6 Hard questions. MongoDB has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both Databricks and MongoDB?
Start with the 4 shared problems since they cover what both companies ask most often. Then add 20 Databricks-specific and 20 MongoDB-specific questions to round out your prep.