Design and evaluate a fraud detection strategy
Company: PayPal
Role: Data Scientist
Category: Analytics & Experimentation
Difficulty: easy
Interview Round: Technical Screen
Overview: This question evaluates fraud domain knowledge, quantitative model evaluation, metrics and diagnostic design, operational strategy formulation, segmentation, and monitoring competencies—covering topics like fraud types, account takeover mechanics, labeling distinctions, thresholding trade-offs, and combined rules/model/manual-review pipelines.
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