Google Software Engineer interview questions

So far I've only completed a phone interview, but it was different in that I was asked to write some code (in the language of my choice, in my case c++) in a google drive document. The interviewer asked me to create a class to describe a deck of cards, then write some functions for such things as shuffling and scoring a hand of poker. Each task was followed up with additional questions, and incorrect or non-optimal solutions were questioned and gently led towards a better solution. I scored an on site interview, despite messing up the shuffling algorithm pretty badly. The interviewer walked me through some questions about my implementation, and led me towards a better one.