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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
CodingStart here. 5 questions · ~56 min
Linked List ReversalEasy
Practice

Reverse a singly linked list in-place using iterative pointer manipulation.

RecursionLinked ListsArraysAmazon Services
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2
SQL & Data Manipulation5 questions · ~56 min
7-Day Rolling Active UsersMedium
Practice

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

Window FunctionsDate FunctionsRunning TotalsAmazon Services
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3
Machine Learning5 questions · ~56 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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4
Execution4 questions · ~45 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
Pipelines4 questions · ~45 min
Data Quality in ETL PipelinesEasy

Approach for maintaining data quality and integrity across ETL pipelines.

IdempotencyData ModelingQualityAmazon Services
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6
Model Evaluation4 questions · ~45 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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7
More topics23 questions · ~258 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
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
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