Came to campus, I emailed them afterwards and was sent 2 coding questions. Had a phone interview a few days later and was asked about the big oh of binary trees and heaps. Then asked to talk about an algorithm for finding the common ancestor in a tree. Contacted for an onsite interview a few days later and was told it would last 2-4 hours. With each of my three interviewers, they asked about things on my resume then we did some code. One question was to do a mergesort given two linked lists. Everyone was friendly and easy to talk with.