As far as I am aware for GECAT A320 TR.
Done on the computer, there is about 2,000 in thier question bank,
you get 100 Total Questions for the exams, all randon but further seperated into sections,
Autoflight
Electrics
Air Con etc etc
In each sections you have to get 75% to pass, but your grand total has to be 75%
So say you got 99% overall, but only scored 73% in say Electrics,then its still classified as a fail, however you only need to repeat the section you fail.
You then do Mass and Balance, Perf and F- Planning and Low Vis written, all require 75% tp pass.