quite easy, don't sweat it
you arrive one day before the interview
around 8AM you get a briefing about QR and Doha
Followed by a technical quizz (around 10 questions multiple choice [general: performance, aerodyn, airlaw - or type specific if type-rated] , 2 essays [what makes a good pilot, describe procedure in case of GPWS, aborted T/O, etc...)
You're then called for an interview appointment. (3 or 4 tech questions, really short (again basic perfo - like climb gradients, ASDA, TODA, etc...) 1 or 2 personal questions - why QR, etc...) (around 15 minutes)
If succesful, you get an appointment for the sim (A300 or A330 depending of where you do the interview)
Sim: Visual circuit in Doha full stop
T/O again with Engine failure after V1
Single Engine ILS
That's it