Also on this subject a word of warning. I know first hand of a cadet on a sponsored mpl scheme getting let go by his airline, entirely stopping his chances of becoming a pilot because he failed an exam three times.
His method of studying was to do, according to him, 2000 questions a day. He had the entire bank memorised.
I am certain that if this guy had read the textbook, had extra tutorial lessons and learnt the theory then he would be flying by now.