My initial communication with Cummins was at a collegiate career fair. I gave a recruiter my resume, spoke face to face for a bit, and expressed interest in being a design engineer. A few weeks later I received a surprise phone interview. During the interview I had to answer technical questions, personality questions, and time & situation management questions. The total interview time was about 30 minutes, and there was no follow-up interview.
My advise for interviewees is to try to be yourself without coming across as sounding arrogant. Also, when you are asked technical questions, it's alright to pause for a minute to think of a good answer.