Google Senior Software Developer Engineer interview questions

I was referred by a friend who works at Google and I had applied for a specific position that they advertised. They called me within a few days and asked me when I am available for a phone screen. The phone screen started with another engineer asking me to type a program into a shared Google doc. While it wasn't a particularly difficult program, I found it to be tough going trying to solve it while on the phone typing in a Google doc editor. It probably took me longer than it should have and I don't think I quite had the boundary conditions just right. I don't know exactly what to say about the experience. Its entirely possible that it reflects poorly on my ability to program, however I have no doubt that it a program I can write fairly easily if I need to. I didn't get past this stage, but regardless I am told that further stages would have involved multiple interrogations and their Mountain View office. It all seems a bit much or maybe despite my years of experience, I am perhaps a programmer gone "soft".

The Recruiter was helpful and very responsive, and tried to keep me updated even when the process became slightly convoluted. Phone screen was easy and brisk, but the interview day was tiring enough that I ended up reaching a blackout on the last interview. That being said, most of the interviewers were very friendly and expressed interest, although none of them read my CV properly (I guess this is normal at Google).