What an entertaining (and to be fair, usefull ) thread.
My views on some of the questions:
"I don't like Scotsmen. Discuss"
"why"? Let the interviewer come back at you. In any event it will be a generalisation and when that becomes apparent, point it out and agree to differ.
"Do you have a good sense of humour"?
"Yes"
"OK say something funny and make us laugh"
"I've heard there's a pilot shortage coming" That should make them smile!
"Tell me the last time you did something wrong"
So tell them. We're all human and make mistakes (Just don't make it a real clanger). The point is you then tell them how you either (a) realised the mistake, re-assessed your course of action and put it right or (b) had the mistake pointed out to you, re-assessed your course of action and put it right.
Cleared to FL150/160?
get back on the radio and ask for confirmation. If it was FL150 you got it wrong, dial in 150. If it was FL160, S/He got it wrong, dial in 160. Job done.
I've never been to an airline interview so