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Updated weekly · Last refresh Aug 30

Kaiser Permanente Data Scientist Interview Questions

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

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1
Machine LearningStart here. 7 questions · ~56 min
Random Forest vs Gradient BoostingMedium

Compare Random Forest and Gradient Boosting, then choose the right ensemble for a supervised learning task.

Ensemble MethodsBias-Variance TradeoffSupervised LearningKaiser Permanente
Handling Severe Class ImbalanceMedium

Explain how to train and evaluate a classifier when the positive class is rare and accuracy is misleading.

ExperimentationFeature EngineeringSupervised LearningKaiser Permanente
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2
A/B Testing & Experimentation3 questions · ~24 min
Estimate Sample Size for Engagement TestHard

Estimate sample size for an engagement experiment, define MDE and guardrails, and pre-register the analysis plan.

MDEPower AnalysisSample SizeKaiser Permanente
Design Test for Novelty and SpilloversHard

Design an experiment that accounts for novelty effects and network spillovers before deciding whether to ship.

Network InterferenceExperimentationNovelty EffectKaiser Permanente
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3
Product Sense4 questions · ~32 min
Portal Metrics and GuardrailsMedium

Tests product sense and metric design to balance impact and safety.

MetricsFeature Prioritizationuser valueKaiser Permanente
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4
Behavioral & Leadership10 questions · ~80 min
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5
More topics5 questions · ~40 min
First Checks for Metric DropsEasy

Outline the first checks to diagnose a sudden drop in a core product metric, starting with data quality, scope, and decomposition.

Lagging IndicatorsLeading IndicatorsDiagnosisKaiser Permanente
Explain Transformer Self-AttentionHard

Explain how transformer self-attention works, including its role in sequence modeling and why it scales better than RNNs.

Neural NetworksLanguage ModelsDeep LearningKaiser Permanente
Statistical Significance for Care InterventionsMedium

Tests statistical testing design for healthcare intervention evaluation.

Hypothesis TestingStatistical SignificanceP-ValuesKaiser Permanente
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