[pdevine]

In addition to what's already been discussed, you should also think about how to answer questions related to the hiring process. In today's competitive world hiring a great team consumes a huge amount of a manager's time and energy. Some questions to think about, how would you attract top talent? What's the interview process look like? How do you know an engineer will be a good hire? Things along those lines.

In the other comments people have spoken quite a bit about managing down in to the team, I'd also think about the project management and scope negotiation portion. As a partner to product management you're often called on to help shape what's possible long before ideas enter sprint planning or get turned into stories. Think about how you'd help negotiate scope when often the actual requirement has not been clarified.