Hi Wendy,

I've been involved as a BA in about a 10 different industries now and each time I had an interview the questions were fairly consistent across the board (i.e. there weren't many questions relating to the industry itself).  Part of the reason may have been because for the most part I didn't have domain expertise before I went into the industry, but when talking with BA recruiters I find that most hiring managers will focus the interview on BA skills rather than domain skills.  If you have familiarity with the domain then you'll have an advantage since you can use your knowledge to make your responses relevant to your target employer, which is all the better. 

Nonetheless, I would focus on thinking about how your previous roles have prepared you as a BA (i.e. what activities have you performed that fall under the BABOK and can be considered doing business analysis work), as most of the questions you will face will likely focus on demonstrating your ability to perform BA activities.  If you want some ideas of what to highlight and prepare for, I highly recommend you check out Laura Brandenburg's great BA career website, Bridging the Gap.  This link will take you to posts that focus on finding a BA job.

Good luck!

Your question made me think about what people who are interviewing BA candidates should be looking for in a BA outside of their experience and knowledge.  I blogged about it on my site and a copy should be up on the Modern Analyst blog in the next day or so.