Hi Nya...
Since this is your first airline interview, you will probably be asked basic performance A stuff, definitions of speeds (V1/V2,etc....),expect to read some weather (TAF's,METAR's,etc....),what you know about the company, a personality screening and a tech exam. Don't know your level of experience but they will gauge you then ask the appropriate questions according to your level of experience.
Just a note,this is probably a good stepping stone airline and the training is relatively good.....Dress smart with tie.
Good Luck