Your question is Evaluate a 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).
You are evaluating a recommendation system for a content platform. The model ranks items for the home feed, and the team wants to know whether it is actually better than the current approach.
How would you evaluate the performance of a recommendation system?