Welcome to your interview.
The question is on your right: Deploy a Personalized Ranking Model. Take a moment with it first.
Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes). Discussion and graded submissions share your five interviewer interactions, so spend them well.
You are shipping a machine learning system that personalizes content ranking in a consumer app. The model performed well offline, but production rollout exposed issues around latency, stale features, and changing user behavior.
What challenges have you faced when deploying machine learning models in production, and how did you overcome them?