Welcome to your interview.
The question is on your right: Define Success Criteria Before Launch. 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.
You are kicking off a UX/UI design project and want to align on what success looks like before launch so the team is not optimizing for subjective feedback later.
How would you define success criteria for the design project before launch?