Your question is Complex System Trade-offs. 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).
Walk us through a complex system you designed; what were the trade-offs you had to make?
Choose an end-to-end ML system you personally influenced and explain the product goal, scale, architecture, and your specific decisions. Cover model stages, offline versus online processing, serving constraints, evaluation, monitoring, and failure modes. Be explicit about alternatives you rejected, why you rejected them, and what you would change in hindsight.