Google Software Development Engineer I interview questions

I asked a friend to refer me. Recruiter called right after, very efficient. But to schedule the phone screen it took 2 wks. After another wk, they scheduled onsite for 5 rounds. Almost every round follow the same pattern, which is coding + coding/design, so basically around 10 questions in total. Only one interviewer asked for background questions.Overall, the interviewers are all very nice, except for one who spent most of his time reading phone, and had some wrong understanding of a basic data structure.