American Express vs Siemens Interview Questions
American Express lists 23 LeetCode interview questions while Siemens lists 25. They share 4 problems — 17% of American Express's bank and 16% of Siemens's. Focus on the overlap first, then drill into 19 American Express-only and 21 Siemens-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 Siemens.
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 Siemens-specific problems from the exclusive lists below.
Step 3 — Difficulty tuning: Siemens 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 Siemens.
| Problem | Difficulty |
|---|---|
| Two Sum | Easy |
| Valid Anagram | Easy |
| Best Time to Buy and Sell Stock | Easy |
| Rotate Array | Medium |
Unique to American Express (19)
Problems in American Express's list that do not appear at Siemens.
Unique to Siemens (21)
Problems in Siemens's list that do not appear at American Express.
| Problem | Difficulty |
|---|---|
| Minimized Maximum of Products Distributed to Any Store | Medium |
| Peaks in Array | Hard |
| Number of Islands | Medium |
| Merge Intervals | Medium |
| Valid Parentheses | Easy |
| The Skyline Problem | Hard |
| Merge Two Sorted Lists | Easy |
| LRU Cache | Medium |
| First Missing Positive | Hard |
| Remove Duplicates from Sorted Array | Easy |
| Maximum Product of Three Numbers | Easy |
| Group Anagrams | Medium |
Frequently Asked Questions
How many LeetCode questions do American Express and Siemens share?
American Express and Siemens share 4 LeetCode interview questions. 19 problems appear only in American Express's list and 21 appear only in Siemens's list.
What topics overlap most between American Express and Siemens?
The most common shared topics between American Express and Siemens are Array (3 shared questions), Hash Table (2 shared questions), String (1 shared questions), Sorting (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 Siemens?
American Express has 8 Easy, 12 Medium, and 3 Hard questions. Siemens has 8 Easy, 13 Medium, and 4 Hard questions. Siemens has a higher proportion of Hard problems in its interview set.
How should I prepare if interviewing at both American Express and Siemens?
Start with the 4 shared problems since they cover what both companies ask most often. Then add 19 American Express-specific and 20 Siemens-specific questions to round out your prep.