Duolingo Interview Questions
The questions to prepare for Duolingo interviews, across all roles. Questions from real interview reports rank first. Updated daily.
Aggregate user activity by week, then use LAG to compare sessions and watch time versus the prior active week.
DuolingoReverse a singly linked list in-place using iterative pointer manipulation.
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Explain how you used a KPI and supporting metrics to diagnose a product issue and make a concrete product decision.
DuolingoExplain how you prioritize work across multiple operational projects with competing deadlines, impact, and stakeholder pressure.
DuolingoExplain how supervised and unsupervised learning differ, and ground the distinction in a practical ML example.
DuolingoDesign an A/B test for a new platform feature, including success metrics, power, guardrails, and a clear ship decision.
DuolingoExplain a controlled month-end close, including reconciliations, accruals, variance analysis, review, and GAAP financial statement completion.
DuolingoA framework for connecting user needs to business goals, then making product decisions with clear trade-offs and measurable outcomes.
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