Amex Data Scientist Interview Questions
The questions to prepare for a Amex Data Scientist interview. Questions from real interview reports rank first. Updated daily.
Calculate each active American Express cardmember's rolling three-month average spend using joins and window functions.
AmexFind the top 3 customers in each region by transaction volume using joins, aggregation, and window ranking.
JPMorganChase
Silicon Valley Bank
Banco SantanderTask American Express wants a monthly view of its highest-spending cardmembers. Write a PostgreSQL query to find the top three spending customers by month ...
American ExpressAmexHandle rare positive labels in ad fraud detection with the right sampling, loss design, validation, and thresholding strategy.
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Design an incrementality test for a new customer marketing campaign with explicit MDE, guardrails, power, and rollout criteria.
AmexExplain what a p-value means, how it relates to statistical significance, and how to describe it clearly to non-technical stakeholders.
AmexDefine a success metric for a new feature that captures real user value, not just raw usage.
AmexExplain what cross-validation is and why it matters when choosing between models.
AmexDiagnose a post-release KPI drop by separating instrumentation issues from real behavior changes and tracing the problem through the metric hierarchy.
AmexTests practices for repeatable, auditable analysis pipelines and documentation.
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