MongoDB vs Salesforce Interview Questions
MongoDB lists 24 LeetCode interview questions while Salesforce lists 188. They share 10 problems — 42% of MongoDB's bank and 5% of Salesforce's. Focus on the overlap first, then drill into 14 MongoDB-only and 178 Salesforce-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 10 overlapping problems first. These are the highest-yield questions for candidates interviewing at both MongoDB and Salesforce.
Step 2 — Company-specific depth: Add MongoDB-specific problems like Implement Trie (Prefix Tree), Snapshot Array, Intersection of Two Arrays and Salesforce-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Salesforce skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
10 Shared Questions
High-priority problems to practice for both MongoDB and Salesforce.
| Problem | Difficulty |
|---|---|
| Word Break | Medium |
| Merge k Sorted Lists | Hard |
| LRU Cache | Medium |
| Merge Intervals | Medium |
| Course Schedule II | Medium |
| Sliding Window Maximum | Hard |
| String Compression | Medium |
| Search in Rotated Sorted Array | Medium |
| Merge Two Sorted Lists | Easy |
| Time Based Key-Value Store | Medium |
Unique to MongoDB (14)
Problems in MongoDB's list that do not appear at Salesforce.
| Problem | Difficulty |
|---|---|
| Implement Trie (Prefix Tree) | Medium |
| Snapshot Array | Medium |
| Intersection of Two Arrays | Easy |
| Text Justification | Hard |
| Convert JSON String to Object | Hard |
| Insert Interval | Medium |
| Web Crawler Multithreaded | Medium |
| Stock Price Fluctuation | Medium |
| Merge Two Binary Trees | Easy |
| Lowest Common Ancestor of a Binary Tree | Medium |
| Design Search Autocomplete System | Hard |
| Lowest Common Ancestor of a Binary Tree III | Medium |
Unique to Salesforce (178)
Problems in Salesforce's list that do not appear at MongoDB.
Frequently Asked Questions
How many LeetCode questions do MongoDB and Salesforce share?
MongoDB and Salesforce share 10 LeetCode interview questions. 14 problems appear only in MongoDB's list and 178 appear only in Salesforce's list.
What topics overlap most between MongoDB and Salesforce?
The most common shared topics between MongoDB and Salesforce are Array (4 shared questions), Hash Table (3 shared questions), String (3 shared questions), Linked List (3 shared questions), Heap (Priority Queue) (2 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: MongoDB or Salesforce?
MongoDB has 3 Easy, 15 Medium, and 6 Hard questions. Salesforce has 25 Easy, 112 Medium, and 51 Hard questions. Salesforce has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both MongoDB and Salesforce?
Start with the 10 shared problems since they cover what both companies ask most often. Then add 14 MongoDB-specific and 20 Salesforce-specific questions to round out your prep.