Your question is Explain Prior System Architecture. 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).
Explain the architecture of a system you have previously built or worked on.
Focus on an ML system where you can explain the end-to-end design, including data flow, model training, inference, deployment, and monitoring. Be prepared to discuss scale, latency, reliability, tradeoffs, and a significant failure or design change.