For the sweep angle of the 737, they just want to see if you have made some research on the aircraft they operate.
It is 25deg, they sometimes ask why 25 and not 27? Better compromise for aerodynamic efficiency and margin between low Mach buffet and high speed buffet.
I apply through the CAE cadet portal and finished my training 2 months ago. I am not type rated on the 737. Just 350h (SEP/MEP).