Your question is Auction Platform. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Design an auction platform.
Asked in the System Design (HLD) stage. Focus on database schemas, scaling, and low-latency API design with caching. Reported follow-ups: How do you handle bid edits? How would you support a near real-time leaderboard?