Product design question
If you have to build a new FB experience for your phone, what would you build?
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
Tests broad product ideation for a major platform plus the discipline to narrow to one scoped, buildable idea.
How to approach it
- Clarify scope: a new standalone phone experience under the Facebook app, not a redesign of News Feed itself.
- Pick a segment: users who want lightweight, low-pressure sharing with close friends rather than broadcast posting.
- Identify the pain point: Feed posting feels performative and public, so many users have shifted to private messaging instead.
- Propose a close-friends audio or short-video check-in feed, a small circle default, replacing the all-friends broadcast default.
- Define success as posts per active user in this new surface and whether it lifts overall time spent without cannibalizing Feed.
What a strong answer includes
- Grounds the idea in a real, documented shift, users moving from public posting to private messaging.
- Picks one scoped idea instead of listing many, showing prioritization discipline.
- Names a concrete cannibalization check against existing Feed and Stories engagement.
Common mistakes
- Listing many unranked ideas instead of committing to one and defending it.
- Ignoring that this idea might just cannibalize existing Feed or Stories usage.
Likely follow-up questions
- How would you prevent this from cannibalizing Stories?
- How would you monetize this new surface?
More product design questions
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- Redesign Twitter for eCommerce.Shopify · Product design · Hard
- How would you go about designing a new location sharing app for Google?Google · Product design · Medium
- How would you improve Google Home?Google · Product design · Easy
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Learn the skill behind it
Chapters of the AI PM course that teach what this question tests.
- Chapter 4: Discovery and strategy for AI products
- Chapter 7: AI UX and human oversight: design for a system that is wrong sometimes
- Chapter 14: Get the job: the AI PM interview loop