Welcome to your interview.
The question is on your right: Usability Testing Under Constraints. 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 methods do you use to test the usability of your designs when traditional user research channels are constrained?