Welcome to your interview.
The question is on your right: Debugging Lifecycle Crash Causes. 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.
How do you debug a crash caused by a mobile app lifecycle issue, such as an activity or view controller being accessed after it is destroyed or detached?