JTK makes some very valid points, though (as he acknowleges) the interview for a pilot job is perhaps a little different from those for industry.
Most of you will be attempting to obtain a job you've never done before. On those grounds, it's difficult to impress by giving examples of previous achievements in this field! Some employers (like BA) will go to town on you as a potential manager (it's a little unlikely, but that's the way they do things) and therefore JTK's stuff applies 100%. Others regard the interview as just a brief chat to see if they can live with you - the professional assessment will be done in the sim, or in the air for smaller companies. Therefore there is less need to impress in the interview; the priority here is not upsetting the interviewer so that you get the chance to show your stuff at the controls!
But we could go on forever - each company has its own distinct style of interviewing, and you are best getting information from those who have gone before you at your target employer - there is lots of archive info here if you search, and don't forget to check on the Terms and Endearments forum also.
Scroggs