I went to my school's career fair and they signed me up for an interview right there. The actual interview was very short and easy; it was just a lot of behavorial questions, all of them about describing a time/situation and how you reacted to that given situation. I received a callback for a second round interview but have not done that yet.

First, they send you an online Technical Assessment. Then, if you pass that round, you will interview with two developers. They look at your resume and ask in depth technical questions.