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Updated weekly · Last refresh Aug 30

Merck Data Scientist Interview Questions

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

26questions
~4htotal time
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1
Machine LearningStart here. 7 questions · ~57 min
2
Behavioral & Leadership9 questions · ~73 min
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3
More topics10 questions · ~82 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 IndicatorsDiagnosisMerck
Design Test for Novelty and SpilloversHard

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

Network InterferenceExperimentationNovelty EffectMerck
Evaluating Observed Lift SignificanceMedium

Explain how to test whether an observed experiment lift is real using hypothesis testing, p-values, and confidence intervals.

Confidence IntervalsStatistical SignificanceP-ValuesMerck
Choosing Classification Evaluation MetricsEasy

Explain which classification metrics to use and how metric choice depends on the business objective and error tradeoffs.

PrecisionAccuracyRecallMerck
Window Functions for Patient RankingMedium

Tests advanced SQL window function skills for patient-level analytics and ordering.

Window FunctionsRankingRunning TotalsMerck
Treatment Success FactorsMedium

Tests causal thinking and statistical modeling to find drivers of treatment success in patient outcomes.

User NeedsValue PropositionUse CasesMerck
Optimize Python Script PerformanceMedium

Tests performance tuning, profiling, and efficient coding practices for production data workflows.

InfrastructureToolsQualityMerck
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
The finish line: interview-readyComplete all 26 questions plus 3 hands-on drills to finish this plan.