I took part to the Auswahltage: 2 days job interview. First day: self presentation, short tour, technical exercises (in the end you have to prepare a presentation explaining how you solved them), exercise in which you show how you would interact with a client. Second day: group exercise with the other candidates, tour of the department in which you would like to work. Very nice atmosphere.

After getting to know each other, the interview was mostly technical questions and discussions relevant to the background needed for the position and lasted for +50 minutes. They didn't ask to do a practical test.