I had one on campus interview, a follow up phone interview and then an on-site interview at their HQ in downtown Palo Alto. HR did a fantastic job with coordinating the interview day but the engineers that interviewed me were on their cell phones and did not seem interested in conducting a comprehensive interview. Every interviewer started off with "Why Facebook?" and asked an algorithm and design question. I realized later that almost all the programming questions I was asked were pulled DIRECTLY from "Programming Interviews Exposed". From the book: The design questions were centered around processing large amounts of data, caching, time complexity, etc.

There were an excessive amount of rounds with a high difficulty of questions for a new grad role. Everyone I spoke too was very friendly though! Study hard and you may be okay.