Oh the focus of the interview is very good. It's Google's interview format after all (actually Microsoft's, but operating systems are hard as well). The great

Oh the focus of the interview is very good. It's Google's interview format after all (actually Microsoft's, but operating systems are hard as well). The great big sleight of hand trick behind all of this is that the entire industry has copied the interview process of a single, extremely large, company. And Google makes $$$ writing software for *extremely complex graphing and search algorithms*. It's a great interview process. For Google. For everyone else, it's holding up a great big sign that says "I'm a moron and I copied my homework assignment from Wikipedia."