American Express vs Infosys Interview Questions
American Express lists 23 LeetCode interview questions while Infosys lists 105. They share 9 problems — 39% of American Express's bank and 9% of Infosys's. Focus on the overlap first, then drill into 14 American Express-only and 96 Infosys-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 9 overlapping problems first. These are the highest-yield questions for candidates interviewing at both American Express and Infosys.
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 Infosys-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Infosys skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
9 Shared Questions
High-priority problems to practice for both American Express and Infosys.
| 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 |
| Isomorphic Strings | Easy |
| Linked List Cycle II | Medium |
| Longest Common Prefix | Easy |
Unique to American Express (14)
Problems in American Express's list that do not appear at Infosys.
Unique to Infosys (96)
Problems in Infosys's list that do not appear at American Express.
Frequently Asked Questions
How many LeetCode questions do American Express and Infosys share?
American Express and Infosys share 9 LeetCode interview questions. 14 problems appear only in American Express's list and 96 appear only in Infosys's list.
What topics overlap most between American Express and Infosys?
The most common shared topics between American Express and Infosys are Array (5 shared questions), Hash Table (5 shared questions), String (4 shared questions), Two Pointers (3 shared questions), Sorting (2 shared questions). Mastering these areas prepares you for both companies.
Which company asks harder LeetCode questions: American Express or Infosys?
American Express has 8 Easy, 12 Medium, and 3 Hard questions. Infosys has 32 Easy, 57 Medium, and 16 Hard questions. Infosys has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both American Express and Infosys?
Start with the 9 shared problems since they cover what both companies ask most often. Then add 14 American Express-specific and 20 Infosys-specific questions to round out your prep.