Your question is Scalable AI Recommendation System. 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 a scalable recommendation system using AI.
Explain how you would clarify requirements, estimate scale, and build an end-to-end system covering candidate retrieval, ranking, re-ranking, online and batch inference, evaluation, monitoring, and failure recovery. Address latency, freshness, cold start, feature drift, training-serving skew, and cost tradeoffs without assuming a specific product or domain.
