MongoDB vs Yandex Interview Questions
MongoDB lists 24 LeetCode interview questions while Yandex lists 128. They share 11 problems — 46% of MongoDB's bank and 9% of Yandex's. Focus on the overlap first, then drill into 13 MongoDB-only and 117 Yandex-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 11 overlapping problems first. These are the highest-yield questions for candidates interviewing at both MongoDB and Yandex.
Step 2 — Company-specific depth: Add MongoDB-specific problems like Word Break, Implement Trie (Prefix Tree), Snapshot Array and Yandex-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
11 Shared Questions
High-priority problems to practice for both MongoDB and Yandex.
| Problem | Difficulty |
|---|---|
| Intersection of Two Arrays | Easy |
| Text Justification | Hard |
| Merge k Sorted Lists | Hard |
| LRU Cache | Medium |
| Merge Intervals | Medium |
| Sliding Window Maximum | Hard |
| Lowest Common Ancestor of a Binary Tree | Medium |
| Lowest Common Ancestor of a Binary Tree III | Medium |
| String Compression | Medium |
| Search in Rotated Sorted Array | Medium |
| Merge Two Sorted Lists | Easy |
Unique to MongoDB (13)
Problems in MongoDB's list that do not appear at Yandex.
| Problem | Difficulty |
|---|---|
| Word Break | Medium |
| Implement Trie (Prefix Tree) | Medium |
| Snapshot Array | 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 |
| Design Search Autocomplete System | Hard |
| Word Break II | Hard |
| Clone Graph | Medium |
Unique to Yandex (117)
Problems in Yandex's list that do not appear at MongoDB.
| Problem | Difficulty |
|---|---|
| Longest Subarray of 1's After Deleting One Element | Medium |
| Summary Ranges | Easy |
| Maximize Distance to Closest Person | Medium |
| Longest Substring Without Repeating Characters | Medium |
| Find K Closest Elements | Medium |
| Subarray Sum Equals K | Medium |
| Valid Palindrome II | Easy |
| Move Zeroes | Easy |
| One Edit Distance | Medium |
| Permutation in String | Medium |
| Isomorphic Strings | Easy |
| Line Reflection | Medium |
Frequently Asked Questions
How many LeetCode questions do MongoDB and Yandex share?
MongoDB and Yandex share 11 LeetCode interview questions. 13 problems appear only in MongoDB's list and 117 appear only in Yandex's list.
What topics overlap most between MongoDB and Yandex?
The most common shared topics between MongoDB and Yandex are Array (5 shared questions), Hash Table (3 shared questions), Two Pointers (3 shared questions), Linked List (3 shared questions), Binary Search (2 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: MongoDB or Yandex?
MongoDB has 3 Easy, 15 Medium, and 6 Hard questions. Yandex has 51 Easy, 67 Medium, and 10 Hard questions. MongoDB has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both MongoDB and Yandex?
Start with the 11 shared problems since they cover what both companies ask most often. Then add 13 MongoDB-specific and 20 Yandex-specific questions to round out your prep.