Google Systems Power Design Engineer interview questions

I have almost no interview explerience before in my career although I have over 10 years experience. I found inertview is quite different than real work. The interviewer asked many quesitons I think are not practical or useful in power supply real work since I have never experienced or would never think of in my long working history as power supply and I have designed many power supplies and solved numerous real design problems . And on the phone you have to answer almost immediately. Some of the questions yo ucan easily find out in any components datasheet so don't have to remember...