Google Software Engineering interview questions

I applied online on October, 2016 but did not hear back until December. While waiting, I personally contacted one of the employee who I knew from my university and right after I was referred by that person, the recruiter began contacting me for documentation and scheduling the interviews. I went through three separate phone interviews Jan~Feb, 2016. The interviews were sequential--scheduled one after another. All interviews were about coding questions. No question on my resume or background at all. All was 1:1 and the interviewees were very interactive and trying to help.