I can't exactly tell you what sort of questions they ask. But a
tip would be to know the background of RSAF. The countries that
train specific aircraft type.
What aircrafts RSAF uses. Know abit of technical specs. would be
useful like ILS system, HUD, max speed, range, what is an AIM 120
missle ?. etc. Not necessary, but impress the interview
board.
Find out when the RSAF was developed, what planes they used
initially, how many pilots ? how many airbase are there in
Singapore and overseas ? so on.
Usually a hand-out has been prepared prior the interview for the
rookies to view.
You can be sure its normal everyday questions. Some wierd ones like
What do you think about your parents ?
Be honest. psychologist can tell if you lie.
