It’s one thing to ask an open-ended technical question that lends itself to straightforward answers (e.g., “What are some things you could do to minimize the time spent in garbage collection?”). It’s quite another to subject the interviewee to game-show riddles. “Four people want to cross a bridge. They all begin on the same side. You have twelve minutes to get all of them across to the other side. It is night. There is one flashlight. A maximum of two people can cross at one time,” etc.
My reply to a riddle question would be this riddle: “How many times do you think your lips can fit on my ass? Because my answer is, ‘Go kiss my ass.’.”
All of these people who think they are so smart could not figure out the answer to the non-riddle question Steve Jobs asked: “How do you re-invent the phone?”
Don’t be intimidated by any of them. They’re not as smart as they think.