I agree, these exams have very little relevance to actual airline flying, yes some of the stuff is important, but stuff like what wind blows over the northeastern part of africa in summer etc etc etc is just useless. Airlaw, Human Factors are good. My italian students barely spoke english when they took them they just studied the crap out of the question banks.
Now my fiance had to redo her entire exams (she didnt complete them in the allotted sittings) and even though it was somewhere around 8 years ago she was recently asked by Ryan Air about it and she didnt get offered the position. Now whether that was the determining factor I don't know. I would say most people for get most of it shortly after writing it.