Hey !

Well congratulations on being selected for the interview. You can only get a clear idea on this subject if you contact someone from QA either professionally or through some other QA forum that you will find around. As an alternative, you can also try FB to post a question regarding this on their page. You best option ? -- would be to call up the person who asked you to come for the interview and get exact details on who you will be meeting and what the nature of the interview will be ? By doing this, you can ward of most "beating around the bush" answers and also make a solid impression on them about how seriously you are taking this interview.

Good luck !