I was never asked a question, which made the interview difficult. I was told tell them why I was qualified during the first interview. The second started with "What questions do you have?" I actually think they learned a lot from setting up the interview like this. I would suggest that you prepare by trying to think of what specific actions you would take, and what additional information you would need to preform well in the role. Being able to discuss specifics like possible deliverables, timelines and partners, in an in-depth way will help you, even if your interview isn't set up like mine.