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TikTok·Product Manager·Onsite - Product Sense / Strategy·Senior

Senior
May 2026

Summary

PM interview at TikTok, one product analytics question about a DAU drop. Pretty standard diagnostic case but the pressure of it being TikTok specifically made me overthink the scope.

Questions Asked (1)

Q1

As a PM at TikTok, you've noticed a drop in daily active users. How do you investigate?

Product Analytics & MetricsRoot Cause AnalysisAdaptability & Ambiguity
Author's notes

I jumped straight to segmentation which felt right but I skipped the step of confirming the data is actually real first.

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AI HintsAI Generated

Suggested Approach

Start by clarifying the metric definition and time frame, then segment the drop by dimensions like platform, geography, and user cohort to localize the issue. Form hypotheses about potential causes (internal changes, external events, technical issues) and validate them with data before proposing solutions.

Pro tip: Always consider both internal factors (e.g., recent product changes, bugs) and external factors (e.g., competitor launches, seasonality, regulatory changes) to show holistic thinking. Mention the importance of checking data quality first to rule out tracking errors.

1. Clarify and Validate the Metric

Confirm the exact definition of DAU, the time period of the drop, and whether it's a sudden or gradual decline. Check for data pipeline issues or tracking errors that could cause false signals.

2. Segment the Data

Break down DAU by dimensions such as platform (iOS/Android), geography, user tenure, acquisition channel, and app version to identify which segments are most affected.

3. Generate Hypotheses

Brainstorm potential causes: internal (product changes, bugs, algorithm updates, marketing campaigns) and external (competitor actions, seasonality, holidays, regulatory changes, economic factors).

4. Analyze and Validate

Use data to test each hypothesis: compare affected segments to unaffected ones, check correlations with events, and conduct qualitative research (user feedback, app store reviews) if needed.

5. Recommend Actions

Based on root cause, propose immediate fixes (e.g., rollback, bug fix) and long-term strategies (e.g., product improvements, marketing adjustments) to recover and grow DAU.

Key Points to Mention

  • Define DAU precisely and check data quality first
  • Segment by platform, geography, user cohorts, and app version
  • Consider both internal and external factors
  • Use a mix of quantitative (analytics) and qualitative (user feedback) methods
  • Prioritize hypotheses based on impact and likelihood
  • Propose actionable next steps and monitor recovery

AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.