It was a long interview process which stretched of a period of 2 months. However, I found the process to be good and it encompassed a lot of aspects of the position I was applying for. I was invited of a 30-45 minute phone interview. Then was called for an onsite interview which lasted 7 hours with 6 or 7 rounds of the interview. Then I was given a coding exercise comprising of two questions and code review session which lasted for over an hour.

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.