Dont worry about the interviews...Its a standard interview process of two days.
Technical questions
Psychomotorical testing
interview with some TREs
If all goes well simride in 320 or 330....emphasis on CRM
This is now, whole process is about to change soon.
In general....come with an open and realistic mindset. Doha can be a difficult place to live but can be peacefull for families.
Dont believe in fairytales
Upgrades take at least 6 years ( there are 500+ FOS ahead of you)
Fleet transfers take a minimum of 2 years
There will be NO bases outside Doha for the nearby future!
You will be worked hard!
In general:
EK offers the best overall package, followed by all the others! It does not matter which company you join...after a while you will know you have sold your soul..
Good luck!