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DataData Engineer interview questions
These are common Data Engineer interview questions, each with a short tip on how to answer it well. Practise out loud, and lead with specific examples and measurable results.
Common Data Engineer interview questions
How do you design a data pipeline?
How to answer. Cover sources, transformation, and reliability.
How do you handle a pipeline failure?
How to answer. Talk alerting, retries, and backfills.
Batch versus streaming, when do you use each?
How to answer. Tie the choice to latency needs.
How do you ensure data quality?
How to answer. Mention tests, validation, and monitoring.
How do you model data for analytics?
How to answer. Explain star schemas and tradeoffs.
How do you optimise a slow warehouse query?
How to answer. Talk partitioning and query structure.
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