Welcome to your interview.
The question is on your right: Model Ad Click Timing. 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.
Given a continuous stream of user click data, how would you model the probability of a user clicking an ad within a specific time window using survival analysis or Poisson processes?