Private Sixth form interview questions

I have 2 interviews coming up for (private) Sixth forms.
I have 0 idea what is going to be on them, and i cant find much information except sample questions from other non private schools.
does anyone here have any information about this process?
for reference, one of them has 1 general interview (25 mins, this one is the second stage, there was an exam, and a personal statement beforehand if that changes anything)
and the other has 1 general, and 3 subject interviews (15 mins each, this one is the first stage, no personal statement or exams)