Google Software Development Engineer interview questions

I was contacted by recruiter. I asked him to gave me two months ow time before screen. The we scheduled my 1st interview. Google doc, phone call, headset is dvantage. Five min introduction "tell me about your PhD/project". Then, a probelm was given me to solve in very vaguous way. I clarified, proposed datastructures and custom datastructures I will use to solve the problem. I was coding, speaking aloud, my interviewr was silent. "Are you happy now with your code?", no I wasnt since I did not debugged it yet. "Are you happy now with your code?", no, let me double check... "Are you happy now with your code?", "Are you happy now with your code?", yes now I am happy, "OK". Then he asked me about complexity and If i can do better than this. The code had one bug and some redundant lines but it was fair good enough for on-site.