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Updated weekly · Last refresh Aug 30

UnitedHealth Group Data Scientist Interview Questions

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

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1
A/B Testing & ExperimentationStart here. 3 questions · ~24 min
Pitfalls in Streaming Experiment AnalysisHard

Identify major online experiment pitfalls and explain how they can bias results in a streaming product A/B test.

Network InterferenceNovelty EffectSample Ratio MismatchUnitedHealth Group
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2
Behavioral & Leadership9 questions · ~72 min
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3
More topics11 questions · ~88 min
Diagnose KPI Drop After ReleaseMedium

Diagnose a post-release KPI drop by separating instrumentation issues from real behavior changes and tracing the problem through the metric hierarchy.

KPILeading IndicatorsDiagnosisUnitedHealth Group
Scaling Data Pipelines EffectivelyMedium

Approach for building data pipelines that scale in throughput, reliability, and operational visibility.

InfrastructureETLUnitedHealth Group
Handle Highly Imbalanced ClassesMedium

Build a classifier for a highly imbalanced dataset and choose training and evaluation methods that surface rare positives.

Cross-ValidationFeature EngineeringSupervised LearningUnitedHealth Group
Handling Missing Clinical ValuesMedium

Tests your ability to impute and validate missing clinical data while controlling bias.

SamplingBiasUnitedHealth Group
Rolling Engagement Metrics SQLMedium

Tests your ability to compute time-series rolling metrics using SQL window functions.

Window FunctionsDate FunctionsRunning TotalsUnitedHealth Group
Model Performance Beyond AccuracyMedium

Tests your judgment in choosing appropriate evaluation metrics under class imbalance or misclassification costs.

Evaluation TechniquesAccuracyModel MetricsUnitedHealth Group
North Star Metrics for Healthcare FeatureMedium

Tests product sense and metric design for measuring outcomes in UnitedHealth Group healthcare features.

North Star MetricMetricsProduct VisionUnitedHealth Group
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
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