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Updated weekly · Last refresh Aug 30

Medpace Data Scientist Interview Questions

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

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1
SQL & Data ManipulationStart here. 3 questions + 2 drills · ~46 min
Rolling 7-Day Average with Window FunctionsMedium
Practice

Calculate patient rolling 7-day averages and rank patients within each Medpace research site using layered window functions.

Window FunctionsRankingRunning TotalsMedpace
Optimize Slow QueriesHard

Tests performance tuning skills for large-scale clinical datasets.

Data WranglingperformanceReconciliationMedpace
Join vs Merge in SASMedium

Tests practical SQL/SAS data manipulation skills for complex relational joins.

Joinsmany-to-onedata integrityMedpace
Second Highest Without AggregatesHard
Practice
Recently asked
Practice drill

Find the second highest salary in each department without using aggregate functions.

SubqueriesRankingSelf-JoinsCredit GenieDevoteamCisco Restaurant + Bar
30-Day Moving Average of BookingsMedium
Practice
Practice drill

Build a daily series and compute a 30-day trailing moving average of task bookings using window functions.

Window FunctionsData WranglingAggregationsTaskRabbitRBC
2
Statistics & Probability4 questions · ~35 min
Parametric vs Non-ParametricMedium

Tests your understanding of statistical test assumptions and selection.

SamplingBiasHypothesis TestingMedpace
Survival Analysis and Cox ModelHard

Tests survival modeling knowledge and interpretation of Cox proportional hazards.

BiasRegressionTime SeriesMedpace
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3
Behavioral & Leadership8 questions · ~69 min
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4
More topics3 questions · ~26 min
Diagnose a Metric Drop After LaunchMedium

Investigate why a key KPI moved the wrong way after a product change and separate signal from noise.

Lagging IndicatorsLeading IndicatorsDiagnosisMedpace
Design Safe Clinical Workflow MetricsHard

Tests metric design judgment to align incentives with safe, high-quality clinical operations.

KPIMedpace
A/B Test for Clinical WorkflowsHard

Tests experimental design and awareness of validity pitfalls in clinical workflow changes.

experiment designGuardrail MetricsNovelty EffectMedpace

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