There's been a lot of hand-wringing over The Technical Interview lately. Many people realize that inverting a binary tree on a whiteboard has basically zero correlation to whether or not someone is actually a good software developer. The most effective programming test anyone's come up with is still Fizzbuzz. One consequence of this has been an increased emphasis on Open Source Contributions, but it turns out these aren't a very good metric either, because most people don't have that kind of time.