[tuq]

1) Probably too subjective for us to answer - the company's culture/industry could be a factor. For example, these days I often tell people not to bother with the suit/tie if it's the type of place where people wear jeans every day.

Anyway, if you're gonna wear it there you might as well leave it on, unless you're the sweaty type.

2) Be honest. Not only a generally good course of action but if you're interviewing w/someone technical they should be able to smoke you out eventually.

If you decide to go the BS route just make sure your answers are concise. People tend to ramble when they are pulling things out of their ass.

Good Luck.