Google Produktmanager interview questions

Applied through the campus website. Had an initial interview with a product manager. Then invited to college day in San Francisco where had a day of interviews. It was a round robin interview process with a large range of questions. After that was told I did not get to the next round of the interview about 2 weeks later.

First round telephone interview with a PM. Very straightforward interview (unexpected), none of the weird/crazy questions that I've read about. Basic behavioral - tell me about yourself, strengths/weaknesses, greatest professional achievement, bad team experience, why Google. And then some time for questions. A total of 45 minutes. No question on Google products, their strategy, design questions etc. Seemed as though the interview was just a formality to reject my candidacy and that the decision was made beforehand. My answers were more or less scripted, well practiced and I don't see how any decision could have been made based on this interview.