Dont worry too much about the assasment.
These guys desperately need pilots (FO).
Soo many, left or are trying to leave this place.
Many even paid ten thousands of € for contract fines to cancel the bonding and leave the company earlier.
Their roster hell and the pay is not worth it anymore since everybody in turkey pays more.
To get the required manpower they keep the assasement just as hard enough to keep out the special pilots.
The biggest struggle for most is usually lack of English skills.
My assasement was already some time ago, but it didnt changed that much.
Non Type rated FO
Assasement is quite straightforward.
Just prepare for mollymawk and refresh basic aviation knowledge.
Interview has more focus on your character than on technical questions.
If you don't know the answer tell them that you dont know it and tell them where you would find the answer.
Dont lie or make a show they will find it out.
Usually there is a german lady (former DLR psychologist) somebody important from HR and a pilot there. everybody asks you questions, they might try to stress you with irregularities or weaknesses in your cv or test results to see how you react on stress.
But they're fair and professional.
Sim is exactly as in the pdf they give you.
Before the sim, they do a briefing and tell you what they want to see from you.
When I joined it was a straight out departure, climb 2000 turn left to VOR and itcpt radial xxx.
thereafter some steep turns, climbs descents with acceleration deceleration, followed by an ILS fd off (you were allowed to use FPV and Map mode).
If youre non type rated they dont require you to know anything 737 specific... just request the gear and the flaps.
My advice, go to pgs or thy if you can, they will also squeeze you like a lemon, but at least they pay properly.
Or
Join and get the required experience for other airlines and leave that place ASAP.
Good Luck
PS: If you and your fellow crewmember are able to keep your eyes open you can do as many handflying, visual and raw datas as you wish.
You fly to many anatolian places which are mainly cavoc in summer with little traffic and no radar where you can have a lot of fun.