Welcome to your interview.
The question is on your right: Programming for 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.
Which programming languages are you most proficient in, and how have you applied them to large datasets at Petco?