Duolingo Data Scientist Interview Questions
The questions to prepare for a Duolingo Data Scientist interview. Questions from real interview reports rank first. Updated daily.
Design an A/B test for a new platform feature, including success metrics, power, guardrails, and a clear ship decision.
DuolingoAggregate user activity by week, then use LAG to compare sessions and watch time versus the prior active week.
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Diagnose why conversion fell from 4.8% to 3.1% after a launch by breaking the metric across funnel steps, cohorts, and segments.
DuolingoAssesses feature selection, modeling strategy, and validation for churn and unsubscribe risk at Duolingo.
DuolingoTests statistical toolkit selection for behavioral metrics and causal or correlational reasoning.
DuolingoTests causal thinking, metric tradeoff handling, and robust evaluation strategy for product changes.
DuolingoTests data engineering design for reliability, correctness, and operational handling of late events.
DuolingoTests how you connect analytics and modeling decisions to user learning outcomes.
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