Top 22
Prep plan
~3h total · Updated weekly · Last refresh Jul 26PayPal Data Scientist Interview Questions
The questions to prepare for a PayPal Data Scientist interview. Questions from real interview reports rank first. Updated weekly.
Rolling 7-Day Metrics
Medium
Tests SQL window functions for time-based rolling aggregations.
Window FunctionsDate FunctionsRunning Totals
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Build a Customer Churn Model
Hard
Build a churn prediction model for a subscription wellness business using behavioral, billing, and engagement data.
Cross-ValidationFeature EngineeringSupervised Learning
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Experiment for Checkout Change
Hard
Tests A/B test design and analysis for conversion and fraud outcomes.
experiment designGuardrail MetricsConversion Rate
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End-to-End Fraud Model Serving
Hard
Tests system design for reliable fraud detection model lifecycle and monitoring.
Feature StoreFeature DriftModel Serving
PayPalProbability Cutoff and Tradeoffs
Medium
Tests choosing classification thresholds and reasoning about fraud-risk trade-offs.
ClassificationConfusion MatrixThreshold Tuning
PayPalMetrics for P2P Feature Launch
Medium
Tests product metric design for PayPal P2P adoption and fraud-risk impact.
product metricsFeature PrioritizationUser Needs
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