American Express interview questions and how to prepare
The questions candidates report from American Express interviews, sorted by how often they come up, with difficulty and topics, plus original practice written in American Express's interview style.
ZorixOS tracks 23 community-reported American Express interview questions, drawn from an open-source dataset of real interview reports and sorted by how frequently each one comes up. Every question links to its source. Alongside them are 98 original ZorixOS practice questions written in American Express's known interview style (not claimed as asked at American Express), so you can rehearse the real format. Practice any of them out loud in a free AI mock interview tuned to American Express.
Updated July 2026
American Express interview questions candidates report
Community-reported from real American Express interviews (open-source dataset), most-asked first. Showing 23. Each links to its source.
- Minimum Deletions to Make Character Frequencies UniqueHash TableStringGreedySortingMedium100% asked
- Minimum Number of Operations to Make Array XOR Equal to KArrayBit ManipulationMedium100% asked
- Valid AnagramHash TableStringSortingEasy100% asked
- Divide an Array Into Subarrays With Minimum Cost IIArrayHash TableSliding WindowHeap (Priority Queue)Hard98% asked
- Maximum Equal FrequencyArrayHash TableHard98% asked
- Divide an Array Into Subarrays With Minimum Cost IArraySortingEnumerationEasy96% asked
- Equal Sum Arrays With Minimum Number of OperationsArrayHash TableGreedyCountingMedium96% asked
- Find a Value of a Mysterious Function Closest to TargetArrayBinary SearchBit ManipulationSegment TreeHard96% asked
- Maximize the Topmost Element After K MovesArrayGreedyMedium96% asked
- Maximum XOR After OperationsArrayMathBit ManipulationMedium96% asked
- Easy96% asked
- Ugly Number IIIMathBinary SearchCombinatoricsNumber TheoryMedium96% asked
- Two SumArrayHash TableEasy88% asked
- Longest Substring Without Repeating CharactersHash TableStringSliding WindowMedium78% asked
- Best Time to Buy and Sell StockArrayDynamic ProgrammingEasy71% asked
- Easy71% asked
- 3SumArrayTwo PointersSortingMedium61% asked
- Consecutive NumbersDatabaseMedium61% asked
- Isomorphic StringsHash TableStringEasy61% asked
- Linked List Cycle IIHash TableLinked ListTwo PointersMedium61% asked
- Longest Common PrefixArrayStringTrieEasy61% asked
- PermutationsArrayBacktrackingMedium61% asked
- Rotate ArrayArrayMathTwo PointersMedium61% asked
Practice questions in American Express's style
Original ZorixOS questions written the way American Express interviews, so you rehearse the real format. Not claimed as asked at American Express.
Imagine you're tasked with optimizing the real-time fraud detection system for Amex transactions. Describe the architectural trade-offs you'd consider when designing a scalable and low-latency solution, focusing on aspects like data ingestion, feature engineering, and model serving.
Software EngineerSystem DesignTests: Assesses ability to design complex, high-throughput, low-latency systems in a security-critical domain.A user reports that their Amex mobile app is occasionally crashing during the payment process when scanning a QR code. How would you approach debugging this issue, starting from gathering information to identifying the root cause and proposing a fix?
Software EngineerDebuggingTests: Evaluates problem-solving skills, systematic debugging methodology, and understanding of mobile application flows.Write a SQL query to identify Amex cardholders who have spent more than $500 on travel in the last quarter and have also made at least two purchases at a restaurant within the same period. Assume tables like `transactions`, `cardholders`, and `merchant_categories` exist.
Data ScientistSQLTests: Tests SQL proficiency for data extraction and analysis relevant to consumer spending patterns.Amex is considering launching a new premium travel rewards credit card targeting affluent millennials. As a Product Manager, how would you define the key features and value proposition for this card? What metrics would you track to measure its success?
Product ManagerProduct StrategyTests: Assesses strategic thinking, understanding of market segmentation, and ability to define product success metrics.Design a user interface for the Amex mobile app that allows users to easily dispute a transaction. Consider the information needed, the steps involved, and potential user frustrations.
Product DesignerUX/UI DesignTests: Evaluates user-centered design thinking, problem identification, and creation of intuitive interfaces for a core customer service function.Amex wants to increase engagement with its Membership Rewards program. Outline a marketing campaign strategy, including channels, messaging, and key performance indicators, to encourage more cardholders to redeem their points for travel.
MarketingMarketing StrategyTests: Tests ability to develop comprehensive marketing plans and align them with business objectives and customer behavior.
92+ more American Express-style questions are in the free library, each practiceable live with adaptive follow-ups and an honest scorecard. Start free.
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