Hi Starvoyager
I believe that they tend to ask a lot of technical questions in the interview interspersed with typical interview questions. I think some of the questions can be aircraft specific if you have a type-rating e.g. where are key instruments/controls etc located? Others may be ops questions - minima etc.
Sorry this is only second hand information but is what I was told by someone else who did an interview with them. He had a type-rating on the B757 already. The format could be different for someone with less hours and no TR.
Do you mind if I ask your background and experience level? I am interested in DHL but I don't have a lot of experience - frozen ATPL, no TR.
Good luck with the interview.
mrpilot