Welcome to your interview.
The question is on your right: Supervised vs Unsupervised Learning. 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.
What are the key differences between supervised and unsupervised learning, and when would you use clustering over classification?