The interview was three parts: a written assessment, a 1 on 1 interview, and a group activity. The written assessment was comprised of some analytical brain teaser type questions and math questions. The 1 on 1 interview centered mostly on technical questions and going over transcript with no behavioral questions. The group activity was just a math word problem (think how many windows are in Chicago, etc) that you reported back to the panel. Seemed like a bit of overkill for an unpaid internship.

The teams I interviewed with were both one-round interviews followed by a tentative offer pending completion of a background check after accepting an offer. It was fairly simple and straight-forward.