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Data Scientist Interview Questions
Practice 9403 coding, system design and machine learning questions from 546 companies, sorted by role, topic and interview round. Every question has step-by-step hints, a code runner that supports 8 languages and an AI mentor; members also get the full solution walkthrough.
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Showing 511–513 of 513 results
- YahooMediumData ScientistEvaluate Widget Impact on User Engagement with A/B Testing
This interview question evaluates metric design, causal reasoning, experiment setup, diagnostics, SQL/statistical checks, and recommendations in a realistic interview setting. A strong answer for Evaluate Widget Impact on User Engagement with A/B Testing states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
Analytics & ExperimentationTechnical Screen - YelpEasyData ScientistEstimate Experiment Duration with Power Analysis
This question tests the ability to perform a power analysis to calculate sample size requirements for an A/B test and derive the experiment duration based on traffic constraints.
Analytics & ExperimentationTechnical ScreenA/B TestingPower AnalysisStatistics - YelpEasyData ScientistRecommend a Decision After a Nonsignificant Experiment
This question tests the ability to interpret nonsignificant experimental results and formulate data-driven business recommendations beyond simple hypothesis testing.
Analytics & ExperimentationTechnical ScreenA/B TestingHypothesis TestingProduct Analytics
Yahoo