I had two Interviews with SAP, the first was over the phone and was fairly formal asking information about my education as I was about to graduate. For the in person interview we were asked to do a presentation on our favorite class we took in college. Following the presentation a panel of 5 interviewers asked a series of questions. While some of the panel were nice two were condescending, rude and actually a bit intimidating. My biggest recommendation is to remain confident and don't let them fluster you. Knowing the two individuals now after being hired I understand that they were trying to see how I would react under pressure. At first this made me question the work culture thinking is this how I will be treated. In the software support industry customers tend to act like this when they encounter issues with a product they are spending 10's of Millions of dollars to implement.

Two tests before the first interview and after that just one other interview with the team manager to know your strenghts and your knowledge at the support area, In my opinion it is a great interview process