Your question is Architecture and System Design Basics. 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).
Describe a system architecture you worked on and walk me through the key design decisions.
Choose an ML system you personally contributed to. Explain its requirements, scale, data and model flow, serving architecture, and the alternatives you considered. Be prepared to discuss reliability, latency, cost, evaluation, monitoring, feature drift, training-serving skew, and a production failure or compromise. State any assumptions clearly and distinguish your individual contributions from the broader team's work.