We tend to frown upon interview questions but I will give you one piece of advice here. Go to an interview with your own experience and not someone else's then when the interviewer asks the difficult questions you will be able to answer them.
Thank you for your advice I will definitely remember this. But I am afraid my posting was not clear and gave you the impression that I am seeking interview advice. The only reason I mentioned the interview is to set up a context for my question but not borrow some ones experience for myself. This was an attempt to fill in the gap in my knowledge regarding the UNIX and 'quality center' that happened to be triggered by the requirement I mentioned.
I guess I should have asked weather or not there is any add-ins for quality center or some other way that would let automated Back-End testing for a UNIX system integrated with Quality Center?