Welcome to your interview.
The question is on your right: ARR vs Billings. 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 is the difference between ARR (Annual Recurring Revenue) and Billings, and why do both metrics matter to a company like Qualys?