Expect the following:
20-25 ATPL questions
Psycho test. You get a bunch of statements you have to agree og disagree with. You can not prepare for this. Just answer what comes to mind when you see the statement.
SIM session. Take off on SID, join a hold over some VOR. ILS for landing. All raw data. Expect 737 full motion sim. They are out to test your CRM and not so much about how you handle the 737.
Interview. Expect one from HR and the chief pilot. Very friendly people. More like a conversation than a interview. They ask what you know about AAI and the life in Saudi. Where you see yourself in 5 years ++