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Updated weekly · Last refresh Oct 17

MSD Data Engineer Interview Questions

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

25questions
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1
SQL & Data ManipulationStart here. 6 questions · ~57 min
Normalization vs Denormalization TradeoffsMedium

Explain normalization, why it improves data integrity, and when denormalization is a practical performance tradeoff.

schema designperformanceData ModelingMSD
Optimizing Large Transaction Table JoinsHard

Explain how to tune a slow PostgreSQL query that joins several large transaction tables using indexes, join strategy, and partitioning.

JoinsperformancesqlMSD
Clustered vs Non-Clustered IndexesMedium

Explain how clustered and non-clustered indexes differ in storage, lookup behavior, and query performance.

JoinsData WranglingMSD
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2
Pipelines6 questions · ~57 min
ETL vs ELT Trade-offsEasy

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

ETLELTData ModelingMSD
Data Quality and Schema EvolutionMedium

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

schema evolutionData ModelingQualityMSD
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3
Behavioral & Leadership10 questions · ~94 min
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4
More topics3 questions · ~28 min
Project Architecture Deep DiveHard

Explain a recent data engineering project's layers, technology choices, and follow-up decisions that improved maintainability and reliability.

project experiencesoft skillsLayered ArchitectureMSD
A/B Testing for Data DeliveryHard

Design an A/B testing framework to compare a new data delivery model against the existing model.

experimental designdistributed systemsfeedback loopMSD
Type I vs Type II ErrorsEasy

Tests statistical reasoning relevant to decision-making in MSD analytics.

Data Analysisstatisticstechnical fundamentalsMSD
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