Mastercard Data Engineer Interview Questions
The questions to prepare for a Mastercard Data Engineer interview. Questions from real interview reports rank first. Updated weekly.
Explain how you replaced a manual Excel workflow with an automated ETL or Python pipeline, including quality checks and scheduling.
MastercardDiscuss integrating a third party API into a pipeline and handling rate limits without duplicating or losing data.
MastercardPractical approach for maintaining data quality across ML ETL pipelines, orchestration, and repeatable data processing.
MastercardTests relational database fundamentals and how keys enforce data integrity.
MastercardEvaluates understanding of window functions and ability to apply them to analytical queries.
MastercardEvaluates SQL optimization techniques and ability to improve query and procedure performance.
MastercardUse a CTE and window functions to calculate daily, cumulative, and three-day moving transaction volumes by Mastercard MCC.
MastercardIdentify near-duplicate Mastercard authorizations with a self-join and rank matching transactions within two minutes.
MastercardAggregate monthly sales by product category and use LAG to calculate month-over-month changes.
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Inc.
Benjamin MooreIdentify transaction IDs that are in the first list but not in the second list.
MastercardTests your ability to write correct Python for log parsing and error-code aggregation.
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