Reefpoint Group Data Scientist Interview Questions

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

Build a Predictive Model from Data

Medium

Build a supervised model from a dataset, from feature prep through validation and deployment choices.

Cross-ValidationFeature EngineeringSupervised Learning

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Precision vs Recall Tradeoff

Easy

Explain the difference between precision and recall, and how each reflects a different type of classification error.

Evaluation TechniquesClassificationConfusion Matrix

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Investigate User Engagement Decline

Medium

Investigate a 15% engagement decline by decomposing the metric, isolating root causes, and proposing actions.

RetentionDiagnosisEngagement Metrics

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Experiment for Retention Impact

Hard

Tests experimental design choices, metrics, and statistical validity for retention experiments.

ExperimentationSample SizeA/B Testing

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Prioritize User Problems with Data

Medium

Framework for using product data to identify and prioritize the user problem that should be solved first.

Feature PrioritizationUser NeedsPain Points

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Handling Missing Data

Hard

Tests data quality handling and correct treatment of missingness.

Window FunctionsData WranglingCTEs

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