1. phone interview
2. On site interview
The interview is quite difficult. SRE is new.
But SRE is very promising, so I will pick up more knowledge to prepare for another SRE interview.
I got through two, hour-long phone interviews before I was turned down. They asked questions about distributed systems, my experience, and then moved onto programming questions. Then I could ask questions to them. Everyone was really nice through the whole process. The questions were fair.