American Express vs ServiceNow Interview Questions
American Express lists 23 LeetCode interview questions while ServiceNow lists 71. They share 3 problems — 13% of American Express's bank and 4% of ServiceNow's. Focus on the overlap first, then drill into 20 American Express-only and 68 ServiceNow-only questions.
Overview
Preparation Strategy
Step 1 — Shared core: Solve the 3 overlapping problems first. These are the highest-yield questions for candidates interviewing at both American Express and ServiceNow.
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 ServiceNow-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: ServiceNow skews harder in our data. Budget extra time for Hard problems if you are targeting that company.
Difficulty Comparison
Top Shared Topics
3 Shared Questions
High-priority problems to practice for both American Express and ServiceNow.
| Problem | Difficulty |
|---|---|
| Two Sum | Easy |
| Longest Substring Without Repeating Characters | Medium |
| Best Time to Buy and Sell Stock | Easy |
Unique to American Express (20)
Problems in American Express's list that do not appear at ServiceNow.
Unique to ServiceNow (68)
Problems in ServiceNow's list that do not appear at American Express.
Frequently Asked Questions
How many LeetCode questions do American Express and ServiceNow share?
American Express and ServiceNow share 3 LeetCode interview questions. 20 problems appear only in American Express's list and 68 appear only in ServiceNow's list.
What topics overlap most between American Express and ServiceNow?
The most common shared topics between American Express and ServiceNow are Array (2 shared questions), Hash Table (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 ServiceNow?
American Express has 8 Easy, 12 Medium, and 3 Hard questions. ServiceNow has 7 Easy, 51 Medium, and 13 Hard questions. ServiceNow has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both American Express and ServiceNow?
Start with the 3 shared problems since they cover what both companies ask most often. Then add 20 American Express-specific and 20 ServiceNow-specific questions to round out your prep.