Captainkarl,
Are you doing PPL? CPL? or ATPL?
If PPL, then no, airlines won't find out your marks for PPL (although, as I don't work for an airline, I stand to be corrected). They will be far more concerned with ATPL marks.
For PPL, there are 40 multiple choice questions to be answered in one and a half hours.
Why do you need to do it by the 7 April. Are you with a flight school? They should be helping you with this sort of information.
If you are doing CPL/ATPL exams then you should be registered with a ground school as that is the only way of the CAA having some guarantee that you have done the required study time.
Cheers
Whirlygig