Product design question

Design a product to improve Facebook employees’ health.

Practice this question out loud. An AI interviewer asks it, follows up like a real interviewer would, and scores your answer. Type or speak.

What this question tests

Internal/employee-facing product design, requiring the candidate to treat employees as a distinct user segment with workplace-specific constraints.

Identify the specific health pain point for a large tech workforce: sedentary desk work and irregular breaks during long meeting-heavy days.
Define the target behavior to change: encouraging short, regular movement breaks without disrupting meeting-dense schedules.
Propose a focused feature: a calendar-integrated tool that detects long meeting blocks and suggests a protected 5-minute movement break, defaulting it into the schedule.
Address adoption: make it opt-out rather than opt-in, since wellness tools with only opt-in adoption tend to reach the already-healthy minority.
Define success as percent of eligible meeting blocks with a break taken, and a self-reported wellbeing survey score as a longer-term outcome guardrail.

Grounds the idea in a specific, well-known workplace health issue, meeting-heavy sedentary days, not a generic wellness app idea.
Makes the adoption mechanism opt-out by design, addressing the real reason most wellness tools fail to reach the people who need them most.
Defines both a behavioral metric and a wellbeing outcome metric.

Proposing a generic fitness app unrelated to the specific structural cause, meeting-heavy schedules, of poor employee health.
Making the tool opt-in only, which typically means the employees who most need it never adopt it.

How would you avoid this feeling like surveillance of employees' calendars?
How would you measure whether this actually improves health, not just break-taking behavior?