I'm still in the process of interviewing for an open DBA position in my company. As the potential candidate, you are trying to appear calm, cool, and collected but sometimes things come out that just don't make sense. Some of the best answers so far:
me: I see you've been a DBA on Linux, Solaris, and Windows. What percentage of time do you think you spend on each OS?
interviewee: About 50% on Solaris, 50% on Linux, and 50% on Windows.
me: What exactly is HP-AIX?
interviewee: It's HP's version of AIX that runs on HP-Superbowl.
me: Explain what happened on your last production recovery.
interviewee: My databases are setup so I never have to recover.
me: Oh? How is that.
interviewee: We use RAID 5.
I'll add more as I go.