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Amazon Services Interview Questions

The questions to prepare for Amazon Services interviews, across all roles. Questions from real interview reports rank first. Updated weekly.

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1
Machine LearningStart here. 5 questions · ~43 min
Supervised vs Unsupervised LearningEasy

Explain how supervised and unsupervised learning differ, and ground the distinction in a practical ML example.

Unsupervised LearningFeature EngineeringBias-Variance TradeoffAmazon Services
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2
SQL & Data Manipulation4 questions + 2 drills · ~55 min
Window Ranking in Ticket QueuesMedium

Explain SQL window functions and when to use ROW_NUMBER() versus DENSE_RANK() for ranked ticket analysis.

Window FunctionsRankingrow_numberAmazon Services
Monthly Sales Trends by CategoryMedium
Practice
Practice drill

Aggregate monthly sales by product category and use LAG to calculate month-over-month changes.

InfrastructureToolsData WranglingTotal Wine & MoreHD SupplyBenjamin Moore
Top Daily Rides by VehicleMedium
Practice
Practice drill

Rank the top 3 completed rides per vehicle per day using joins, a CTE, and ROW_NUMBER.

Window FunctionsJoinsData WranglingWaymo
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3
Pipelines4 questions · ~35 min
Data Quality in ETL PipelinesEasy

Approach for maintaining data quality and integrity across ETL pipelines.

IdempotencyData ModelingQualityAmazon Services
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4
Execution4 questions · ~35 min
Balancing Speed Quality and ScopeHard

Describe a time you had to choose between speed, quality, and scope, and how you aligned stakeholders around the trade-off.

Trade-offsRisk AssessmentScope ManagementAmazon Services
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5
Model Evaluation4 questions · ~35 min
Evaluate Cross-Validation Impact on Model PerformanceMedium

Analyze how cross-validation affects the performance metrics of a regression model predicting housing prices.

Cross-ValidationSupervised LearningAmazon Services
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6
Metrics4 questions · ~35 min
Choosing Metrics for New ProgramsEasy

Pick metrics for a new program by tying them to the goal, separating leading and lagging signals, and defining a clear KPI set.

KPIsLeading IndicatorsDiagnosisAmazon Services
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7
More topics25 questions · ~216 min
Determining A/B Test SignificanceMedium

Explain how to evaluate whether an A/B test result is statistically significant and how to interpret the result.

marketing experimentStatistical SignificanceAnalysisAmazon Services
Linked List ReversalEasy

Tests basic coding ability and pointer/data-structure manipulation.

RecursionLinked ListsArraysAmazon Services
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The finish line: interview-readyComplete all 50 questions plus 2 hands-on drills to finish this plan.