The interview process was very professional and smoothly run, but also challenging, as you'd expect from a top company. I had one interview on my school's campus before making it to the final round in Redmond. The on campus interview was a basic/intermediate data structures question, while the final round tested more than just programming - they want to see ability to problem solve. Thinking on your feet is extremely important in the final round, since you will most likely get at least one type of curveball question that you can't really prepare for (similar to a work environment). At the end of the 4 interviews, you get the rest of the day in the Seattle area with the other interviewees, which took a lot of pressure off of the entire interview day. Overall, it was a very seamless process that tested how you perform in different situations, but also allowed you to meet students from around the world and have time to explore the campus as well as the surrounding area.