Welcome to your interview.
The question is on your right: Overfitting and Regularization. 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 determine whether a statistical model is overfitting, and what specific regularization techniques would you use for high-dimensional scientific data at Pacific Northwest National Laboratory - Pnnl?