Welcome to your interview.
The question is on your right: Actor Collaboration Hash Table. 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 list of actors and the movies they played in, construct a bidirectional hash table and write an algorithm to check if two actors have worked together and whether they share at least one mutual co-actor.