I met them in the campus career fair. Then was invited to campus interview. All the questions were behavioral and got to know more about the company and rotational program. Invited to a second interview in St Louis. Had a social the night before the interview, there were many senior level management staff, senior engineers, and alumni from the rotational program. The next day is the interview, and we also got to tour their facility. It was surprising to see the company CEO showing up for the interview process, it shows that the company really cares about this program. 3 rounds of interview, mostly behavioral but they also ask in detail of your previous technical projects so make sure to remember all the details. It was a great overall experience, everyone seems to know each other and they really care if you are having a good time during the whole process.

Went to my university's career fair and got an interview by showing enthusiasm and a couple minutes of research on the company's background. I was then invited to an on-campus interview, where they asked standard behavioral (STAR format) questions, which were open-ended and long (3 questions took about 45 minutes as they ask questions off of your answer). After that, I was invited to an on-site "career day" where I and other applicants were interviewed by three teams of two, and took a plant tour as well. The questions and interview were in the same format as the on-campus interview. We were given resources on what areas the questions would focus on (all behavioral). Technical questions might pop up based on your answers, but are very soft if you aren't making anything up. Overall, it was a fairly easy process. The interviewers were all very nice and encouraging, and I was provided with the resources to succeed in the interviews.