Perhaps I'm missing something but why would you want to impress yourself at an interview? Surely the point of an interview is to impress the others... Is this some sort of confidence-building strategy - I'd have thought that if you need that sort of help you'd be better getting self-confident in the days and weeks before the interview rather than waiting for the event itself.
I'm puzzled by the examples ou've gibven that seem to be pretty normal interview questions - what have they to do with impressing yourself?
ps. Trotting out stock answers that have been fed to you on an internet forum is unlikely to impress anyone at interview, least of all yourself, let alone anyone else.