chc.1989, One of the lads mentioned it before. When you reply back to confirm your attendance for teh 1a, they will provide you with the cathay pacific aviation knowledge booklet in pdf form. Which includes topics such as :
Air Navigation, Principles of Flight, Meteorology, Engines and Aircraft systems, to name a few.
There will be a technical mcq on this book. Followed by a compass test.
If you want to study before receiving this booklet, simply google up "PHAK", this goes into far more depth than the aviation knowledge booklet they provide you.
When are you taking the 1a?