Applied through college or university. The phone interview was extremely intense, with many probability questions and brainteasers. They expect you to solve the problems very quickly, which can put you in pressure. I never got beyond the phone interview, so I can't really tell what to expect. Bayes is your friend. If you aren't the kind of person who solves puzzles and mental games fairly often, you might have a difficult time. I don't think there is any way to ace it unless you have the natural talent.