Arista Networks vs MongoDB Interview Questions
Arista Networks lists 39 LeetCode interview questions while MongoDB lists 24. They share 5 problems — 13% of Arista Networks's bank and 21% of MongoDB's. Focus on the overlap first, then drill into 34 Arista Networks-only and 19 MongoDB-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 Arista Networks and MongoDB.
Step 2 — Company-specific depth: Add Arista Networks-specific problems like Construct String With Repeat Limit, Find the Town Judge, Reverse Nodes in k-Group 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
5 Shared Questions
High-priority problems to practice for both Arista Networks and MongoDB.
| Problem | Difficulty |
|---|---|
| Course Schedule II | Medium |
| LRU Cache | Medium |
| Search in Rotated Sorted Array | Medium |
| Word Break | Medium |
| Merge Two Sorted Lists | Easy |
Unique to Arista Networks (34)
Problems in Arista Networks's list that do not appear at MongoDB.
| Problem | Difficulty |
|---|---|
| Construct String With Repeat Limit | Medium |
| Find the Town Judge | Easy |
| Reverse Nodes in k-Group | Hard |
| Restore IP Addresses | Medium |
| Reorder List | Medium |
| Reverse Linked List II | Medium |
| Remove Linked List Elements | Easy |
| Contains Duplicate II | Easy |
| Inorder Successor in BST II | Medium |
| Maximum Depth of Binary Tree | Easy |
| Copy List with Random Pointer | Medium |
| Missing Number | Easy |
Unique to MongoDB (19)
Problems in MongoDB's list that do not appear at Arista Networks.
| Problem | Difficulty |
|---|---|
| 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 |
| Sliding Window Maximum | Hard |
Frequently Asked Questions
How many LeetCode questions do Arista Networks and MongoDB share?
Arista Networks and MongoDB share 5 LeetCode interview questions. 34 problems appear only in Arista Networks's list and 19 appear only in MongoDB's list.
What topics overlap most between Arista Networks and MongoDB?
The most common shared topics between Arista Networks and MongoDB are Hash Table (2 shared questions), Linked List (2 shared questions), Array (2 shared questions), Depth-First Search (1 shared questions), Breadth-First Search (1 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: Arista Networks or MongoDB?
Arista Networks has 12 Easy, 26 Medium, and 1 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 Arista Networks and MongoDB?
Start with the 5 shared problems since they cover what both companies ask most often. Then add 20 Arista Networks-specific and 19 MongoDB-specific questions to round out your prep.