Microsoft Data Engineer Interview Questions
The questions to prepare for a Microsoft Data Engineer interview. Questions from real interview reports rank first. Updated weekly.
Use CTEs, LEFT JOINs, and ROW_NUMBER to return each active user's first and last event with deterministic tie-breaking.
MicrosoftUse a CTE and ROW_NUMBER to identify duplicate customer records, keep one row, and flag the rest.
MicrosoftExplain how to choose normalized or denormalized schemas for transactional and analytics workloads, including trade-offs in performance and data quality.
MicrosoftOptimize a large Microsoft Teams engagement query using early filtering, pre-aggregation, joins, and LAG for weekly trends.
MicrosoftDetermine if a string reads the same forward and backward using a two-pointer scan.
MicrosoftDetermine whether two MSCI labels are anagrams by comparing character frequencies in linear time.
MicrosoftSort intervals by start time, then merge overlapping ranges into a minimal non-overlapping list.
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Approach for validating ETL data with schema, business rule, and pipeline-level checks.
MicrosoftApproach for handling schema changes and data quality checks in a high-volume data lake pipeline.
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