American Express vs Visa Interview Questions
American Express lists 23 LeetCode interview questions while Visa lists 146. They share 7 problems — 30% of American Express's bank and 5% of Visa's. Focus on the overlap first, then drill into 16 American Express-only and 139 Visa-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 7 overlapping problems first. These are the highest-yield questions for candidates interviewing at both American Express and Visa.
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 Visa-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Visa skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
7 Shared Questions
High-priority problems to practice for both American Express and Visa.
| 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 |
| Longest Common Prefix | Easy |
Unique to American Express (16)
Problems in American Express's list that do not appear at Visa.
Unique to Visa (139)
Problems in Visa's list that do not appear at American Express.
| Problem | Difficulty |
|---|---|
| Text Justification | Hard |
| Length of Longest V-Shaped Diagonal Segment | Hard |
| Rotating the Box | Medium |
| Split the Array | Easy |
| Minimum Operations to Write the Letter Y on a Grid | Medium |
| Find the Length of the Longest Common Prefix | Medium |
| LRU Cache | Medium |
| Block Placement Queries | Hard |
| Create Target Array in the Given Order | Easy |
| Number of Black Blocks | Medium |
| Group Anagrams | Medium |
| Simplify Path | Medium |
Frequently Asked Questions
How many LeetCode questions do American Express and Visa share?
American Express and Visa share 7 LeetCode interview questions. 16 problems appear only in American Express's list and 139 appear only in Visa's list.
What topics overlap most between American Express and Visa?
The most common shared topics between American Express and Visa are Array (5 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 Visa?
American Express has 8 Easy, 12 Medium, and 3 Hard questions. Visa has 32 Easy, 92 Medium, and 22 Hard questions. Visa has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both American Express and Visa?
Start with the 7 shared problems since they cover what both companies ask most often. Then add 16 American Express-specific and 20 Visa-specific questions to round out your prep.