I applied through college or university. The process took 6 days. I interviewed at Gulfstream (State College, PA) in Apr 2013
Interview
The entire process was very easy going and relaxed. I applied through my schools database and a few days later I heard from the collegiate representative that they were extending an interview to me. The interview was one on one with a former Penn State graduate. We talked for over the 30 minute interview slot because it turned into a conversation.
Asked basic interview questions. Nothing technical. People were easy to talk to and super friendly. They gauge their interns based on their personality rather than former experience. Highly recommend, enjoyed the process.
The process took 3 weeks. I interviewed at Gulfstream (Savannah, GA)
Interview
IEF Co-op; recruited from the university career fair. Fit check for the team, personality-based questions, and questions related to past projects and work. The interview lasted half an hour and was often with the past graduates of the university who went through the program and were hired for full time.
University recruiting, interviewed the day after career fair. Was asked to explain resume and answer some behavioral questions. There were some follow up questions about things on my resume but no real technical, exam-like questions.