The process is very different depending on the specific area you're applying to. For one position, I was able to get into contact with someone through a campus recruiting event. I was given a technical phone interview that started with questions based on my resume and was not given an offer. However, it should be noted that I was ill-prepared because it had been my first interview. For another position, I applied online and received a response after several weeks. I was given an in-person interview during the week on a date specifically set off for intern interviews. It was local for me, but several other potential interns were flown in. We we given a brief history and background of the company, and then each candidate was called one-by-one by the manager they were going to be interviewed by. Because it was an all-day event, breakfast and lunch were both provided. Several people were interviewed multiple times throughout the day. There were a few technical questions, but most of it was behavioral.