I applied to DB through my university's career website. I had never spoken with a recruiter or employee of DB beforehand but was offered an interview. The first round interview consisted of standard behavioral questions (name a time you had to lead a group) technical questions relevant to the job (what are the 3 types of joins - didn't know that one) and brain teasers. Called back within the week, the second round was effectively the same thing with a slightly heavier technical component. I was asked to write an SQL query but nothing more. More brain-teasers in this one as well. Both of these interviews were with two managers each. Took 3 weeks to recieve a callback from that. (Note, this location was growing and was in all-hand-on-deck hiring mode)

Group exercises: To evaluate teamwork and communication skills. Individual exercises: Case studies, presentations, or written exercises related to your field of interest. Interviews: A mix of technical and behavioral questions.