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Updated weekly · Last refresh Oct 17

Amazon Lab126 Data Engineer Interview Questions

The questions to prepare for a Amazon Lab126 Data Engineer interview. Questions from real interview reports rank first. Updated daily.

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1
PipelinesStart here. 4 questions · ~32 min
Migrate to Cloud-Native WarehouseMedium

Assesses your ability to plan and execute modern data platform migrations with minimal risk.

cloud architecturedata migrationlegacy systemsAmazon Lab126
Schema for Real-Time MetricsMedium

Assesses your approach to modeling time-series telemetry for streaming ingestion and analytics.

performance trackingAmazon Lab126
Data Quality in StreamingHard

Evaluates your strategies for preventing, detecting, and correcting bad data in real-time pipelines.

Data QualityAmazon Lab126
Recover From Pipeline FailureHard

Tests your incident response, troubleshooting, and stakeholder communication during pipeline outages.

business impactAmazon Lab126
2
Behavioral & Leadership7 questions · ~56 min
Clarifying Conflicting Stakeholder RequirementsEasy

Tests stakeholder requirement gathering under ambiguity, with emphasis on communication, alignment, and turning conflicting input into clear requirements.

Stakeholder ManagementCommunicationOwnershipAmazon Lab126
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3
More topics3 questions · ~24 min
Measuring Customer ImpactMedium

Assesses your ability to define metrics and instrumentation for consumer product performance.

performance measurementtechnical knowledgeAmazon Lab126
Relational vs NoSQL LoggingMedium

Tests your ability to choose and justify storage technologies for high-volume device telemetry.

nosqlrelational databasesdatabase designAmazon Lab126
Optimizing Slow SQL QueriesHard

Tests ability to diagnose and optimize SQL performance at large scale.

large datasetsAmazon Lab126

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Window Functions for Top UsersMedium
Practice
Practice drill

Use aggregation and ROW_NUMBER to find the top three Lexis+ users by total session duration within each region.

Window FunctionsData AnalysissqlLexisNexis Legal & ProfessionalAmazon Lab126Andela Products
Convert MySQL to NoSQLHard
Practice
Practice drill

Translate multi-table MySQL analytics logic into equivalent NoSQL document operations while preserving joins, aggregates, and rankings.

nosqlmysqldata migrationBarclays
Merge, Keys, and Large Data MigrationMedium
Practice
Practice drill

Explain MERGE behavior, primary vs foreign keys, and how to migrate large data safely.

data migrationsqldatabase designSnowflake Computing
The finish line: interview-readyComplete all 14 questions plus 3 hands-on drills to finish this plan.