Top 16
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Updated weekly · Last refresh Sep 20

Carnegie Mellon University Data Scientist Interview Questions

The questions to prepare for a Carnegie Mellon University Data Scientist interview. Questions from real interview reports rank first. Updated daily.

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1
A/B Testing & ExperimentationStart here. 4 questions · ~35 min
Experimentation Pitfalls With Small SamplesMedium

Assesses your awareness of statistical and operational pitfalls in small-sample experiments.

Carnegie Mellon University
A/B Test for Public Health InitiativeMedium

Tests your ability to plan a controlled experiment with appropriate metrics, design, and analysis.

Carnegie Mellon University
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2
Behavioral & Leadership4 questions · ~35 min
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3
More topics8 questions · ~70 min
Rolling Average Over Last 30 DaysMedium
Practice

Calculate each customer's 30-day rolling engagement average using a PostgreSQL window function.

Date FunctionsData ManipulationAggregationsCarnegie Mellon University
Fairness and Interpretability in Black-Box ModelsMedium

Balance predictive performance with fairness checks and interpretable explanations when using complex black-box models.

fairnessblack-box modelsinterpretabilityCarnegie Mellon University
Accuracy vs Interpretability Trade-offMedium

Evaluates how you align modeling choices with stakeholder interpretability needs.

interpretabilitystakeholder communicationCarnegie Mellon University
Testing Statistical SignificanceMedium

Tests your understanding of hypothesis testing and significance in trial results.

Statistical SignificanceCarnegie Mellon University
Diagnosing Precision DropsMedium

Assesses your debugging approach for model performance regressions in real-world public health settings.

DiagnosisCarnegie Mellon University
Data Pipeline for Social ImpactMedium

Assesses your end-to-end pipeline design for reliability, data quality, and downstream modeling needs.

data pipelineCarnegie Mellon University
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Hands-on SQL practiceWrite and run real queries in the editor. 2 drills · ~20 min
The finish line: interview-readyComplete all 16 questions plus 2 hands-on drills to finish this plan.