Product design question

Design a simple video conferencing application like Zoom.

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

Baseline product sense for a well-understood collaboration product category.

Clarify target segment: enterprise teams, casual social calls, or education.
Pick a segment, e.g. small business teams needing reliable daily meetings.
Identify pain points: connection reliability, meeting fatigue, and difficulty sharing or collaborating live.
Propose reliable low-latency video and audio, screen sharing with annotation, and async recording or summary.
Prioritize reliability first, since it's the baseline trust requirement for any video product.
Define success as call completion rate without drops, and weekly active meeting minutes.

Picks a specific segment rather than trying to serve every possible video-call use case.
Names reliability and call quality as the top priority, since it's a baseline trust requirement, not a differentiator.
Adds an async layer, recordings and summaries, addressing meeting fatigue, a well-known real pain point.
Picks a reliability metric alongside usage, not usage alone.

Focusing only on fun or novel features while ignoring baseline reliability, the actual trust factor.
Not picking a specific segment, resulting in a generic, undifferentiated feature list.

How would you differentiate this from existing established video conferencing tools?
How would you handle scaling to very large meetings, 100 or more participants?