Welcome to your interview.
The question is on your right: Hash Table vs Binary Search Tree. 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 is the difference between a hash table and a binary search tree, and when would you use one over the other?