Very nice workplace. Used to be the old Google building, and it seems to have been remodeled. Interview consisted of four parts, each about an hour long. First asked me about what I would like from the internship and my past coding experience. Then it moved on into a white-board coding/C++ question. After this a different person came in and tested my C++ knowledge. Then there was a one-hour paper test (more coding questions) and then one more interviewer came in for another white-board question. Some of the questions were not so much about coding, but tested your problem-solving abilities and probability intuition. I was really impressed with the difficulty of the interview questions and the intelligence of the interviewers which is largely what led me to accept the offer. I did not expect such rigor from a company I had thought was all but dead, but it turns out that Advertising.com is one of the only things going right for AOL, so don't identify them with one another!