Welcome to your interview.
The question is on your right: Java Memory Model and GC. 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.
Explain the Java memory model, specifically focusing on how garbage collection handles memory allocation and deallocation.