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Prep plan
Updated weekly · Last refresh Aug 30

Aetna Data Scientist Interview Questions

The questions to prepare for a Aetna Data Scientist interview. Questions from real interview reports rank first. Updated weekly.

50questions
~7htotal time
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1
SQL & Data ManipulationStart here. 8 questions + 1 drill · ~78 min
2
Statistics & Probability8 questions · ~68 min
Power Analysis for Experiment PlanningMedium

Reason about power analysis when planning an experiment and choosing sample size.

ExperimentationPower AnalysisSample SizeAetna
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3
Product Sense7 questions · ~60 min
Measure Patient Onboarding SuccessMedium

Build a measurement framework for a new patient onboarding feature, with clear success metrics, guardrails, and decision criteria.

Success Criteriaonboardinguser valueAetna
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4
A/B Testing & Experimentation8 questions · ~68 min
Design Test for Product LaunchMedium

Design an A/B test for a new digital product launch with clear metrics, power, guardrails, and a defensible ship decision.

experiment designGuardrail Metricsprimary metricsAetna
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5
Metrics5 questions · ~43 min
Investigate User Engagement DeclineMedium

Investigate a 15% engagement decline by decomposing the metric, isolating root causes, and proposing actions.

RetentionDiagnosisEngagement MetricsAetna
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6
Machine Learning8 questions · ~68 min
Model Selection for ReadmissionMedium

Evaluates your end-to-end process for choosing and validating models for a healthcare prediction use case.

model selectionvalidationAetna
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7
More topics6 questions · ~51 min
Beyond Accuracy for ClassificationHard

Tests your ability to choose appropriate classification metrics when accuracy fails.

Classificationperformance metricsModel EvaluationAetna
Hadoop vs SparkMedium

Assesses knowledge of distributed data processing frameworks and their trade-offs.

sparkhadoopAetna
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The finish line: interview-readyComplete all 50 questions plus 1 hands-on drill to finish this plan.