Thats fair, but then you should have your post phrased differently. You are not literally requiring three use cases as an answer to your question or ending the

Thats fair, but then you should have your post phrased differently. You are not literally requiring three use cases as an answer to your question or ending the interview, but rather you are using it as a starter for a discussion. Indeed, it is better to have a more general discussion about the foundations one is to work on, then to solve random riddles.