Welcome to your interview.
The question is on your right: Validation Strategy to Prevent Overfit. 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 did you design the validation strategy for your last predictive model to ensure it did not overfit?