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Updated weekly · Last refresh Aug 30

Duke University Data Scientist Interview Questions

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

36questions
~5htotal time
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1
SQL & Data ManipulationStart here. 5 questions + 2 drills · ~62 min
SQL Window Functions for TrendsMedium
Practice

Use PostgreSQL window functions to calculate grant-level running totals and three-month moving averages for Duke research expenditures.

Window FunctionssqlRunning TotalsDuke University
Second Attempt Score Per UserEasy
Practice
Practice drill

Use ROW_NUMBER to return each student's second score on a specified Khan Academy exercise.

Data Analysissqluser engagementKhan Academy
Top Users by Recent Transaction VolumeMedium
Practice
Practice drill

Find the top 3 users by completed transaction volume in the last 30 days using joins and aggregation.

Data Analysisquery optimizationsqlTTier 1 BankRevolutChime
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2
Machine Learning3 questions · ~25 min
Supervised vs Unsupervised LearningEasy

Explain how supervised and unsupervised learning differ, and ground the distinction in a practical ML example.

Unsupervised LearningFeature EngineeringBias-Variance TradeoffDuke University
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3
Metrics4 questions · ~33 min
Improve Student RetentionMedium

Tests your ability to translate an institutional goal into an analytics plan and measurable outcomes.

Funnel AnalysisRetentionDiagnosisDuke University
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4
Statistics & Probability6 questions · ~50 min
Handling Missing DataEasy

Tests your statistical approach to missingness and choosing appropriate imputation or modeling strategies.

RegressionCausal InferenceData WranglingDuke University
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5
Product Sense4 questions · ~33 min
Evaluate Communication CampaignMedium

Assesses KPI selection and measurement design for a university-wide communications initiative.

Communicationsuccess metricsDuke University
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6
A/B Testing & Experimentation4 questions · ~33 min
Experiment Design for Teaching MethodsMedium

Assesses experimental design for measuring teaching interventions in a university setting.

experiment designDuke University
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7
More topics10 questions · ~83 min
Preferred Data Analysis LibrariesEasy

Explain which data analysis libraries you prefer in pipeline work and why you choose them.

ToolsData WranglingDuke University
Evaluate Model PerformanceEasy

Tests your understanding of metrics, validation strategy, and tradeoffs for model quality.

PrecisionAccuracyRecallDuke University
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The finish line: interview-readyComplete all 36 questions plus 2 hands-on drills to finish this plan.