This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
IMO, like many other "throw-away" open-ended questions, it can be a waste of time. However, if the candidate is ready for it, it can be a spring board to a prepared answer that highlights the skills and qualities that the candidate wants to display. It may be a silly question, but there is nothing wrong with having an answer for it.