Welcome to your interview.
The question is on your right: Design Cross-Session Chat Memory. 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 building a chatbot for a consumer product that should remember useful context across sessions. A user may come back days later and expect the bot to recall preferences, ongoing tasks, and prior decisions, but not every detail from past chats.
Walk me through how you would decide what to store, what to summarize, what to forget, and how you would keep the bot from using stale or sensitive memory.