Waiter-Waitress Buffet Interview Question:

One good way to find out about the department is to try to "informally" interview the existing employees over coffee (outside of the office) if possible. It's hard if you don't have any connections there, but if you do a great way to learn about it. Other than that, it's often hard to learn about the department so you can turn the table back on them by asking questions to learn about it.