Google Software Engineer - New Grad interview questions

I applied online and then was reached out to with a test to take. I took the test, which was about 1.5 hours. There was two questions, I was only able to solve the first one but got a technical phone interview from that. For the technical interview I just got asked to implement some binary tree functions.

There are four round of interviews, all of interviewers are very friendly and willing to share their ideas on problems . But my first interviewer is late for 20 minutes due to traffic and we have to walk to a different building which takes additional 5 minutes, considering each round is only 45 minutes. However, I didn't tell my recruiter about this, not sure if it is the right thing to do or not. I really like the entire process from the snapshot to the last round, very interesting and exciting. Not to say my recruiter sends me lot of study material, they are very valuable to a new grad. Thank you. Unfortunately I didn't get into the pool, maybe I will try again in the future when I am more prepared. However thanks to everyone in this process, I had an amazing time.