goML Data Engineer Interview Questions

The questions to prepare for a goML Data Engineer interview. Questions from real interview reports rank first. Updated daily.

19questions

~3htotal time

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PipelinesStart here. 13 questions · ~104 min

Set up pipeline monitoring and alerting that catches critical failures quickly while limiting noisy alerts.

Handle Late Data in StreamingHard

Design a streaming pipeline that can absorb late-arriving events while keeping aggregates correct and downstream tables stable.

Stream ProcessingIdempotencyData Modeling

goML

ETL vs ELT Trade-offsEasy

Compare ETL and ELT, and explain when ELT is the better pipeline pattern.

ETLELTData Modeling

goML

Data Quality and Schema EvolutionMedium

Approach for handling schema changes and data quality checks in a high-volume data lake pipeline.

schema evolutionData ModelingQuality

goML

Data Quality in ETL PipelinesEasy

Approach for maintaining data quality and integrity across ETL pipelines.

IdempotencyData ModelingQuality

goML

Cost and Performance ADLS LayoutMedium

Tests your understanding of ADLS organization, partitioning, and cost-performance tradeoffs for analytics workloads.

cost optimization

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Behavioral & Leadership5 questions · ~40 min

Owning a Pipeline Performance FixMedium

Tests ownership in diagnosing and fixing a slow data pipeline, with emphasis on root-cause analysis, communication, and measurable impact.

data pipelinesOwnershipPrioritization

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min

Compute daily active users and a 7-day rolling average using a CTE, distinct counts, and window functions.