Welcome to your interview.
The question is on your right: Difference Between Interface and Abstract Class in Java. 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.
Discuss the differences between interfaces and abstract classes in Java. What are their respective use cases? How do they impact code design and flexibility?