Welcome to your interview.
The question is on your right: Array Insert Complexity. 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.
Explain the runtime complexity (Big O notation) of inserting a new value into an array at the very beginning (array[0]). What happens to the existing elements?