I applied at my university's career fair. I got a call from the recruiter about two months later and we set up a call to talk about my interests. My first round interview was on the phone using collabedit, and was technical. I was asked to program a function that analyzed sets and sets within those sets. I solved it with a BFS/DFS variant. Though I felt I answered the questions correctly, I knew that I was a little nervous and was unsure if I'd make it to the next round. Just a couple business days later, I got a call notifying me that I would be interviewing in the final round. I got to choose the teams with which I interviewed. Each of the two final round interviews was technical, but the third phone call was casual. One technical question was a greedy interval scheduling problem, and the other was a binary search variant. I was also asked really specific questions about a data structure, but was not expected to know it all. The conversations went really well and just two days later I got a call with the offer. Overall, none of the questions were easy, but nor were they extremely difficult. If you know your data structures and did well in your algorithms course, you will be prepared.