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Updated weekly · Last refresh Nov 6

Amazon Data Services Data Scientist Interview Questions

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

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1
Product SenseStart here. 3 questions · ~27 min
Turn Ambiguity Into Success MetricsHard

Translate an ambiguous Keystone Strategy business problem into a scoped data science problem with measurable success criteria.

Jobs to Be Doneproduct analysisMetricsAmazon Data Services
Prioritize Features for AI ProductsMedium

A framework for prioritizing AI product features based on user value, feasibility, evaluation quality, and trade-offs.

Feature PrioritizationValue PropositionAmazon Data Services
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2
A/B Testing & Experimentation4 questions · ~36 min
Explain a P-Value in Plain LanguageHard

Explain a p-value in everyday language and distinguish statistical significance from practical importance.

experiment designMDEprimary metricsAmazon Data Services
Sample Size for Statistical SignificanceHard

Calculate the sample size needed for statistical significance using baseline rate, MDE, alpha, power, and experiment constraints.

experiment designMDEStatistical SignificanceAmazon Data Services
Network Interference in Collaboration TestMedium

Explain when network interference threatens an A/B test, how it biases estimates, and how to redesign the experiment safely.

Network InterferenceExperimentationA/B TestingAmazon Data Services
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3
Behavioral & Leadership3 questions · ~27 min
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4
More topics3 questions · ~27 min
Rolling Average Over Last 30 DaysMedium
Practice

Calculate each customer's 30-day rolling engagement average using a PostgreSQL window function.

Date FunctionsData ManipulationAggregationsAmazon Data Services
Investigate Metric DropMedium

Diagnose a below-expectations product metric drop using decomposition, guardrails, and experiment checks.

metric selectionDiagnosiskpi hierarchyAmazon Data Services
Optimizing Slow Queries at ScaleHard

Explain how to diagnose and optimize a slow PostgreSQL query on large Apidel Technologies datasets.

SubqueriesJoinsData WranglingAmazon Data Services

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Hands-on SQL practiceWrite and run real queries in the editor. 2 drills · ~20 min
SQL Policy Changes in 30 DaysMedium
Practice
Practice drill

Count distinct Next Insurance policyholders with a policy change within 30 days of purchase.

Date FunctionsJoinsData ManipulationNext insurance
SQL for User Booking DataEasy
Practice
Practice drill

Extract one ordered record per booking with user, date, destination, status, and amount fields.

JoinsData ManipulationData WranglingExpedia Group
The finish line: interview-readyComplete all 13 questions plus 2 hands-on drills to finish this plan.