Welcome to your interview.
The question is on your right: Performance With Large Datasets. 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 strategies do you use to ensure your UI remains performant when dealing with large datasets?