The most update and regularly updated info of Cathay Pacific is Wikipedia.
Its posible that some of their rumours are incorrect but I their facts are far better than the Cathay website and also far better than those of us in the company....I have no idea how many jets and what their type/configs/engine are!! (and I bet your interviewer is unsure too - it changes every week or so anyway!
Have a look here some some good detailed info....thats we we look too!
http://en.wikipedia.org/wiki/Cathay_Pacific