American Express vs Apple Interview Questions
American Express lists 23 LeetCode interview questions while Apple lists 300. They share 8 problems — 35% of American Express's bank and 3% of Apple's. Focus on the overlap first, then drill into 15 American Express-only and 292 Apple-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 8 overlapping problems first. These are the highest-yield questions for candidates interviewing at both American Express and Apple.
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 Apple-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Apple skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
8 Shared Questions
High-priority problems to practice for both American Express and Apple.
| Problem | Difficulty |
|---|---|
| Two Sum | Easy |
| Valid Anagram | Easy |
| Longest Substring Without Repeating Characters | Medium |
| Best Time to Buy and Sell Stock | Easy |
| 3Sum | Medium |
| Rotate Array | Medium |
| Permutations | Medium |
| Longest Common Prefix | Easy |
Unique to American Express (15)
Problems in American Express's list that do not appear at Apple.
Unique to Apple (292)
Problems in Apple's list that do not appear at American Express.
| Problem | Difficulty |
|---|---|
| LRU Cache | Medium |
| Number of Islands | Medium |
| Merge Intervals | Medium |
| Design Hit Counter | Medium |
| Reverse Linked List | Easy |
| Valid Sudoku | Medium |
| Group Anagrams | Medium |
| Top K Frequent Elements | Medium |
| Course Schedule II | Medium |
| Course Schedule | Medium |
| Valid Parentheses | Easy |
| Product of Array Except Self | Medium |
Frequently Asked Questions
How many LeetCode questions do American Express and Apple share?
American Express and Apple share 8 LeetCode interview questions. 15 problems appear only in American Express's list and 292 appear only in Apple's list.
What topics overlap most between American Express and Apple?
The most common shared topics between American Express and Apple are Array (6 shared questions), Hash Table (3 shared questions), String (3 shared questions), Sorting (2 shared questions), Two Pointers (2 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: American Express or Apple?
American Express has 8 Easy, 12 Medium, and 3 Hard questions. Apple has 76 Easy, 178 Medium, and 46 Hard questions. Apple has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both American Express and Apple?
Start with the 8 shared problems since they cover what both companies ask most often. Then add 15 American Express-specific and 20 Apple-specific questions to round out your prep.