In answer to your question, it should not cause conflict in most countries however, what does the Turkish AIP say about changing altimeter settings? The best place to get an answer to that is in a briefing room of a UK airport used by the "Bucket and Spade" men where copies of other National AIP's are kept. I'd suggest that that the real answer would be that there would be a conflict (otherwise why the question - the interviewer will often want to show how clever they are) so the real issue is (as you politely praise the interviewer with his depth of knowledge) - How will you deal with the potential conflict (I bet you'll be a given a low QNH!)?