I applied through a recruiter. The process took 2 months. I interviewed at Google (Mountain View, CA) in Nov 2016
Interview
Multiple calls with different recruiters in with different specialties, my process was handed off between 5 different recruiters before an onsite. When I arrived the final recruiter did not show up, was greeted half an hour late by a temporary employee who grunted hi, showed me to a room, and sat playing games on their phone. 5 in-person interviews had a mix of expected and interesting questions, evaluation appeared to be focused on how well prepared you were for each question.
Interview questions [2]
Question 1
What is something you consider to be a great product, and how would you make it 10 times better?
I applied online. The process took 4 weeks. I interviewed at Google in Aug 2018
Interview
Phone screen with a recruiter followed by an interview with a product manager. You will run across the same questions you read in the book "Crack the PM Code", or "Decode and Conquer", however, google is interested in breaking your answers so you can keep coming back with more. You will eventually reach a dead end. If you are lucky, and can come up with huge and creative answers on the fly, then you will do well.
I applied online. The process took 5 weeks. I interviewed at Google (Mountain View, CA)
Interview
The interview process is the same as described by others here and online. Initial screening followed by two phone interviews followed by 5 onsite interviews back to back. The onsite was very draining frankly and the toughest part was to stay fresh and focused throughout.
Interview questions [1]
Question 1
Improve a product
What is your favorite product and why