How do you feel about full-stack dev quiz?

quizIt has been a while since I published the first question in full-stack dev quiz. What are your feelings about this series - do you like it? Are these questions too difficult or too easy? Maybe not what you expect? Do you prefer questions with choices like the one about Java 8 features or open questions like the one about test cases? Let me know your opinion by sending me a message or share it in the comments under this post.