Pinterest Data Scientist Interview Questions
The questions to prepare for a Pinterest Data Scientist interview. Questions from real interview reports rank first. Updated weekly.
Use CTEs and window functions to calculate 7-day transaction averages and rank Loft users within each region.
PinterestUse joins, date filtering, aggregation, and ROW_NUMBER to find the three most-saved Pin categories for new Pinterest users.
PinterestUse a CTE and window functions to calculate daily, cumulative, and three-day moving transaction volumes by Mastercard MCC.
MastercardInvestigate a 15% engagement decline by decomposing the metric, isolating root causes, and proposing actions.
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Explain how bias and variance shape model complexity, generalization, and model selection.
PinterestExplain when network interference threatens an A/B test, how it biases estimates, and how to redesign the experiment safely.
PinterestExplain how to evaluate a classifier on imbalanced data, with focus on metrics that are more informative than accuracy.
PinterestFramework for choosing a feature's primary success metric and guardrails before launch.
PinterestTests selection of appropriate hypothesis tests for non-normal, skewed metrics.
PinterestTests ability to design an end-to-end recommendation approach balancing performance and user experience.
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