NVIDIA vs X Interview Questions
NVIDIA lists 136 LeetCode interview questions while X lists 51. They share 9 problems — 7% of NVIDIA's bank and 18% of X's. Focus on the overlap first, then drill into 127 NVIDIA-only and 42 X-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 9 overlapping problems first. These are the highest-yield questions for candidates interviewing at both NVIDIA and X.
Step 2 — Company-specific depth: Add NVIDIA-specific problems like Special Binary String, Longest Substring Without Repeating Characters, Best Time to Buy and Sell Stock and X-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: X skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
9 Shared Questions
High-priority problems to practice for both NVIDIA and X.
| Problem | Difficulty |
|---|---|
| LRU Cache | Medium |
| Merge k Sorted Lists | Hard |
| Valid Parentheses | Easy |
| Trapping Rain Water | Hard |
| Merge Intervals | Medium |
| Reverse Linked List | Easy |
| Insert Delete GetRandom O(1) | Medium |
| Max Points on a Line | Hard |
| The Skyline Problem | Hard |
Unique to NVIDIA (127)
Problems in NVIDIA's list that do not appear at X.
| Problem | Difficulty |
|---|---|
| Special Binary String | Hard |
| Longest Substring Without Repeating Characters | Medium |
| Best Time to Buy and Sell Stock | Easy |
| Two Sum | Easy |
| Group Anagrams | Medium |
| Minimum Operations to Reduce an Integer to 0 | Medium |
| Last Stone Weight | Easy |
| Maximum Subarray | Medium |
| Maximize Greatness of an Array | Medium |
| Number of Islands | Medium |
| Maximum Number of Visible Points | Hard |
| Restore IP Addresses | Medium |
Unique to X (42)
Problems in X's list that do not appear at NVIDIA.
| Problem | Difficulty |
|---|---|
| Tweet Counts Per Frequency | Medium |
| Flatten Nested List Iterator | Medium |
| Implement Trie (Prefix Tree) | Medium |
| Design Twitter | Medium |
| Binary Gap | Easy |
| Regular Expression Matching | Hard |
| Integer to Roman | Medium |
| Word Break II | Hard |
| Alien Dictionary | Hard |
| Time Needed to Buy Tickets | Easy |
| Trapping Rain Water II | Hard |
| Finding the Users Active Minutes | Medium |
Frequently Asked Questions
How many LeetCode questions do NVIDIA and X share?
NVIDIA and X share 9 LeetCode interview questions. 127 problems appear only in NVIDIA's list and 42 appear only in X's list.
What topics overlap most between NVIDIA and X?
The most common shared topics between NVIDIA and X are Array (5 shared questions), Hash Table (3 shared questions), Linked List (3 shared questions), Design (2 shared questions), Divide and Conquer (2 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: NVIDIA or X?
NVIDIA has 32 Easy, 89 Medium, and 15 Hard questions. X has 8 Easy, 31 Medium, and 12 Hard questions. X has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both NVIDIA and X?
Start with the 9 shared problems since they cover what both companies ask most often. Then add 20 NVIDIA-specific and 20 X-specific questions to round out your prep.