American Express vs LinkedIn Interview Questions
American Express lists 23 LeetCode interview questions while LinkedIn lists 141. They share 5 problems — 22% of American Express's bank and 4% of LinkedIn's. Focus on the overlap first, then drill into 18 American Express-only and 136 LinkedIn-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 5 overlapping problems first. These are the highest-yield questions for candidates interviewing at both American Express and LinkedIn.
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 LinkedIn-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: LinkedIn skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
5 Shared Questions
High-priority problems to practice for both American Express and LinkedIn.
| Problem | Difficulty |
|---|---|
| Two Sum | Easy |
| Longest Substring Without Repeating Characters | Medium |
| Best Time to Buy and Sell Stock | Easy |
| Permutations | Medium |
| Isomorphic Strings | Easy |
Unique to American Express (18)
Problems in American Express's list that do not appear at LinkedIn.
Unique to LinkedIn (136)
Problems in LinkedIn's list that do not appear at American Express.
| Problem | Difficulty |
|---|---|
| Max Stack | Hard |
| Nested List Weight Sum II | Medium |
| All O`one Data Structure | Hard |
| Word Ladder | Hard |
| Find the Celebrity | Medium |
| Nested List Weight Sum | Medium |
| Design Authentication Manager | Medium |
| Find Leaves of Binary Tree | Medium |
| Shortest Word Distance II | Medium |
| Maximum Subarray | Medium |
| Max Consecutive Ones III | Medium |
| Valid Parentheses | Easy |
Frequently Asked Questions
How many LeetCode questions do American Express and LinkedIn share?
American Express and LinkedIn share 5 LeetCode interview questions. 18 problems appear only in American Express's list and 136 appear only in LinkedIn's list.
What topics overlap most between American Express and LinkedIn?
The most common shared topics between American Express and LinkedIn are Array (3 shared questions), Hash Table (3 shared questions), String (2 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 LinkedIn?
American Express has 8 Easy, 12 Medium, and 3 Hard questions. LinkedIn has 25 Easy, 90 Medium, and 26 Hard questions. LinkedIn has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both American Express and LinkedIn?
Start with the 5 shared problems since they cover what both companies ask most often. Then add 18 American Express-specific and 20 LinkedIn-specific questions to round out your prep.