My friend referred me, also I had applied online. I got email from HR asking for 3-4 time slots. Then I was scheduled two back-to-back interview calls for 45-60mins duration. Process was really nice and I liked the interviewers. I followed Glassdoor and so far it has really been helpful (at least in this interview). Sometimes depending just on Glassdoor is not advisable, you should practice a lot because 45 minutes for a completely new problem is not sufficient.