American Express vs NVIDIA Interview Questions
American Express lists 23 LeetCode interview questions while NVIDIA lists 136. They share 6 problems — 26% of American Express's bank and 4% of NVIDIA's. Focus on the overlap first, then drill into 17 American Express-only and 130 NVIDIA-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 6 overlapping problems first. These are the highest-yield questions for candidates interviewing at both American Express and NVIDIA.
Step 2 — Company-specific depth: Add American Express-specific problems like Minimum Deletions to Make Character Frequencies Unique, Maximum Equal Frequency, Divide an Array Into Subarrays With Minimum Cost II and NVIDIA-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: American Express skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
6 Shared Questions
High-priority problems to practice for both American Express and NVIDIA.
| Problem | Difficulty |
|---|---|
| Two Sum | Easy |
| Valid Anagram | Easy |
| Longest Substring Without Repeating Characters | Medium |
| Best Time to Buy and Sell Stock | Easy |
| 3Sum | Medium |
| Longest Common Prefix | Easy |
Unique to American Express (17)
Problems in American Express's list that do not appear at NVIDIA.
Unique to NVIDIA (130)
Problems in NVIDIA's list that do not appear at American Express.
| Problem | Difficulty |
|---|---|
| Special Binary String | Hard |
| LRU Cache | Medium |
| Merge k Sorted Lists | Hard |
| Group Anagrams | Medium |
| Valid Parentheses | Easy |
| 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 |
Frequently Asked Questions
How many LeetCode questions do American Express and NVIDIA share?
American Express and NVIDIA share 6 LeetCode interview questions. 17 problems appear only in American Express's list and 130 appear only in NVIDIA's list.
What topics overlap most between American Express and NVIDIA?
The most common shared topics between American Express and NVIDIA are Array (4 shared questions), Hash Table (3 shared questions), String (3 shared questions), Sorting (2 shared questions), Sliding Window (1 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: American Express or NVIDIA?
American Express has 8 Easy, 12 Medium, and 3 Hard questions. NVIDIA has 32 Easy, 89 Medium, and 15 Hard questions. American Express has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both American Express and NVIDIA?
Start with the 6 shared problems since they cover what both companies ask most often. Then add 17 American Express-specific and 20 NVIDIA-specific questions to round out your prep.