American Express vs ByteDance Interview Questions
American Express lists 23 LeetCode interview questions while ByteDance lists 64. They share 4 problems — 17% of American Express's bank and 6% of ByteDance's. Focus on the overlap first, then drill into 19 American Express-only and 60 ByteDance-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 4 overlapping problems first. These are the highest-yield questions for candidates interviewing at both American Express and ByteDance.
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 ByteDance-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: ByteDance skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
4 Shared Questions
High-priority problems to practice for both American Express and ByteDance.
| Problem | Difficulty |
|---|---|
| Two Sum | Easy |
| Longest Substring Without Repeating Characters | Medium |
| Best Time to Buy and Sell Stock | Easy |
| Linked List Cycle II | Medium |
Unique to American Express (19)
Problems in American Express's list that do not appear at ByteDance.
Unique to ByteDance (60)
Problems in ByteDance's list that do not appear at American Express.
| Problem | Difficulty |
|---|---|
| LRU Cache | Medium |
| Remove Duplicate Letters | Medium |
| Smallest Subsequence of Distinct Characters | Medium |
| First Day Where You Have Been in All the Rooms | Medium |
| Number of Islands | Medium |
| Course Schedule | Medium |
| Combination Sum | Medium |
| Basic Calculator II | Medium |
| Merge Intervals | Medium |
| Shortest Bridge | Medium |
| House Robber | Medium |
| Maximal Square | Medium |
Frequently Asked Questions
How many LeetCode questions do American Express and ByteDance share?
American Express and ByteDance share 4 LeetCode interview questions. 19 problems appear only in American Express's list and 60 appear only in ByteDance's list.
What topics overlap most between American Express and ByteDance?
The most common shared topics between American Express and ByteDance are Hash Table (3 shared questions), Array (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 ByteDance?
American Express has 8 Easy, 12 Medium, and 3 Hard questions. ByteDance has 4 Easy, 51 Medium, and 9 Hard questions. ByteDance has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both American Express and ByteDance?
Start with the 4 shared problems since they cover what both companies ask most often. Then add 19 American Express-specific and 20 ByteDance-specific questions to round out your prep.