I met the recruiter at a college job fair. They flew me out for day-long interview. You worked in groups of 3, and the programming task had 3 parts to it, so each person picked a part. The parts were conceptually related, so teamwork was a benefit (bouncing ideas off each other), but in the end your code is your own; you could use any language you want (independent of team members). Halfway through the day there was a 30 minute session where you were expected to walk through your algorithm design choices and code with 2 of the proctors.