I applied through an employee referral. The process took 6 months. I interviewed at Google
Interview
Got referred in September. Received a coding challenge with 1 medium and 1 easy question. Had 3 telephonic interviews with 1 question each- 2 Leet Coce Hards and 1 medium. They grilled on time complexity and accuracy of solution.
I applied online. I interviewed at Google in Aug 2018
Interview
First the resume was shortlisted via online application and then within few weeks they Sent an online coding test where there were some basic list slicing questions a few questions testing the space complexity and a question about binary trees.
OA, Phone Interview, two rounds, and I have one extra round of phone interview. Each of the interview was about 45 mins long. It will be the form like talking about yourself with one or two algorithm problems. And after that you may ask any questions you like.