PwC Data Engineer Interview Questions
The questions to prepare for a PwC Data Engineer interview. Questions from real interview reports rank first. Updated weekly.
Explain how UNION and UNION ALL combine operational data from multiple sources and when each should be used.
PwCExplain how to choose join types, handle NULLs, and avoid duplication when using joins in complex SQL transformations.
PwCExplain how to clean nulls, remove duplicates, and standardize inconsistent values during SQL transformations.
PwCUse PostgreSQL window functions to calculate client running totals and trailing 30-day average transaction volumes.
PwCAggregate monthly sales by product category and use LAG to calculate month-over-month changes.
Total Wine & More
Inc.
Benjamin MooreUse ROW_NUMBER() to keep the earliest created_at 'Repl created' per entity and return out-of-order duplicates to delete.
Replit
QuantcastApproach for maintaining data quality and integrity across ETL pipelines.
PwCApproach for safely backfilling missing data while preserving correctness, idempotency, and data quality.
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Assesses your breadth of data engineering fundamentals across SQL, Python, and end-to-end delivery.
PwCAssesses your approach to preparing data for analytics or ML while maintaining data quality.
PwCDescribe how you collaborated across different backgrounds and working styles to keep a project on track and deliver results.
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