This week's book giveaway is in the Agile and other Processes forum. We're giving away four copies of The Mikado Method and have Ola Ellnestam and Daniel Brolund on-line! See this thread for details.
This is not the first time someone asks this question on the forums here. I wonder why this is such an interesting question.
Is this an interview question that gets asked to a lot of people? If it is, then the goal is probably not to check if you know the answer, but to find out how you reason to find an answer to the question.