Daily Active Users Dropped 5% - Diagnose It

What interviewers evaluate

• Do you clarify before diving in (define DAU, confirm it's real, the timeframe)?
• Do you rule out measurement/data issues first?
• Do you decompose systematically (segment by platform, geo, cohort, channel)?
• Do you separate internal causes (releases) from external (seasonality, competitors, outages)?
• Do you form testable hypotheses and propose how to confirm each?

A framework to structure your answer

1. Clarify - define DAU precisely, confirm magnitude and window, check if it's a sudden cliff or gradual decline.

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