Google Intern interview questions

My resume is submitted via an Google engineer I know rather than using their web page. Then I received an E-mail asking me to sign the NDA and give them the scanned version. Later, I went to their office for a face-to-face interview with one interviewer.

Recruiter reached out to me after I was recommended by a former intern. The whole process took < 2 weeks. I had two back-to-back phone interviews, an hour each. Most of the time was spent solving two coding problems each interview, with a few culture-type questions at the end. I got an e-mail a day later with an offer.