First round 1 hour phone screen followed by 3 more rounds, 2 technical 1 behavioral. Phone screen asked some behavioral questions after the first few basic questions, as well as a basic coding question.

It was a one hour interview with half and half behavioral and technical. In general, the questions weren't hard, but I put "difficult" for interview difficulty because they showed me a graph and asked how I would write a program that calculates its cutoff frequency. I didn't have to write the code, but basically talk them through my approach. Also, they asked a lot of core concepts of CS questions.