Welcome to your interview.
The question is on your right: Time vs Space Complexity Tradeoffs. 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.
How do you evaluate time and space complexity tradeoffs when solving an algorithmic problem? Walk through how you would choose between a slower low-memory approach and a faster higher-memory one.