Metrics question
Weekly active users (WAU) for iPhone app dropped. What happened?
- Meta
- Metrics
- Medium
Practice this question out loud. An AI interviewer asks it, follows up like a real interviewer would, and scores your answer. Type or speak.
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What this question tests
Root cause diagnosis of a metric drop using a structured funnel that separates internal from external causes.
How to approach it
- Confirm the drop is real, checking for tracking or instrumentation bugs before assuming a real behavioral change.
- Segment the drop by geography, new versus existing users, OS version, and app version to isolate where it concentrates.
- Check internal causes, a recent release, a broken feature, or a pricing or policy change.
- Check external causes, a competitor launch, an OS update breaking compatibility, or seasonality.
- Once isolated, propose the fix, for example rolling back a bad release or patching a compatibility bug.
What a strong answer includes
- Starts with an instrumentation check, confirming the analytics SDK did not break in the latest release, before chasing a false lead.
- Shows real segmentation, for example the drop is 80 percent concentrated in one OS version after a specific app release, pointing to a compatibility bug.
- Ties the diagnosis to a fast fix and defines how recovery will be confirmed, WAU returning to baseline within a week.
Common mistakes
- Jumping to external causes without first checking for a tracking or release bug.
- No segmentation, treating the drop as uniform across all users.
- No plan to verify the fix actually worked.
Likely follow-up questions
- What would you check first if the drop turned out to affect only new users?
- How would you prevent this kind of drop from happening again?
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More questions from Meta
Learn the skill behind it
Chapters of the AI PM course that teach what this question tests.
- Chapter 9: Prove it paid off: outcomes, economics, and pricing
- Chapter 2: Data fluency: SQL, logs, and reading the truth yourself
- Chapter 14: Get the job: the AI PM interview loop