American Express vs Intel Interview Questions
American Express lists 23 LeetCode interview questions while Intel lists 25. They share 3 problems — 13% of American Express's bank and 12% of Intel's. Focus on the overlap first, then drill into 20 American Express-only and 22 Intel-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 3 overlapping problems first. These are the highest-yield questions for candidates interviewing at both American Express and Intel.
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 Intel-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
3 Shared Questions
High-priority problems to practice for both American Express and Intel.
| Problem | Difficulty |
|---|---|
| Two Sum | Easy |
| Longest Substring Without Repeating Characters | Medium |
| Best Time to Buy and Sell Stock | Easy |
Unique to American Express (20)
Problems in American Express's list that do not appear at Intel.
Unique to Intel (22)
Problems in Intel's list that do not appear at American Express.
| Problem | Difficulty |
|---|---|
| Trapping Rain Water | Hard |
| Find Consecutive Integers from a Data Stream | Medium |
| Maximum Nesting Depth of the Parentheses | Easy |
| Valid Parentheses | Easy |
| Number of Islands | Medium |
| Copy List with Random Pointer | Medium |
| Count Primes | Medium |
| Best Time to Buy and Sell Stock II | Medium |
| LRU Cache | Medium |
| Reverse Integer | Medium |
| Maximum Subarray | Medium |
| Climbing Stairs | Easy |
Frequently Asked Questions
How many LeetCode questions do American Express and Intel share?
American Express and Intel share 3 LeetCode interview questions. 20 problems appear only in American Express's list and 22 appear only in Intel's list.
What topics overlap most between American Express and Intel?
The most common shared topics between American Express and Intel are Array (2 shared questions), Hash Table (2 shared questions), String (1 shared questions), Sliding Window (1 shared questions), Dynamic Programming (1 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: American Express or Intel?
American Express has 8 Easy, 12 Medium, and 3 Hard questions. Intel has 10 Easy, 14 Medium, and 1 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 Intel?
Start with the 3 shared problems since they cover what both companies ask most often. Then add 20 American Express-specific and 20 Intel-specific questions to round out your prep.