Product design question

You are a product manager at T-mobile. Design a fridge for children. How will you estimate the market? How will you price the fridge? Should T-mobile invest in this business?

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

Handling a deliberately odd, off-brand prompt with structured market sizing and an honest go or no-go recommendation.

Flag the mismatch upfront: T-Mobile is a telecom carrier, not an appliance maker, so ask what strategic rationale would justify this, likely an IoT push.
Define the product: a connected, kid-friendly fridge with parental-control, screen-time-style features, a plausible IoT angle for T-Mobile.
Estimate the market top-down: roughly 30M US households with kids, times a low 1 to 2% attach rate for a niche connected appliance, as an assumption.
Price using cost-plus and a comparable: connected mini-fridges retail around $150 to $300, so price near the top given smart features.
Weigh whether to invest: compare this small, off-core opportunity against T-Mobile's core connectivity subscription business.
Recommend likely passing or licensing the concept rather than manufacturing, since it's far from telecom's core competency and margins.

Names the mismatch honestly instead of pretending a telecom company obviously belongs in appliances.
Shows explicit market-sizing math with assumptions clearly marked as assumptions.
Reaches a clear recommendation, likely no or partner and license, rather than dodging the ask.

Diving into fridge feature design without ever questioning why T-Mobile would do this.
Giving no market-sizing numbers when explicitly asked to estimate.

Chapters of the AI PM course that teach what this question tests.