Just "learn enough to go pass your exam."
You haven't set for yourself any requirement to actually be able to acquire enough knowledge for yourself to actually use it
on the job, should you be lucky enough to bamfoozle someone into actually giving
you a job (unlikely), and should you also be BS-artist enough to hoodwink that person into letting you keep
The real world is not school. Out here, we don't earn our daily bread by "passing tests," although some of us have
made a little money by writing a few questions for them from time to time.
"Passing a test" is merely an indicator,
not a goal.
By studying the exam materials, you do indeed expose yourself to a concentration of knowledge that other professionals (including yours truly...) have opined might be most-useful to you, and that we have prepared in what we hoped would be a palatable format. It's very concentrated food, served to you on a silver platter (that you must pay "silver" for). "Make of this what you will."
What you will get, in the end, is: "what you
have made of it," nothing more or less. It could be the start of a great career, or
it could be a useless piece of paper that hangs on your wall. If your attitude
is merely, "I want to pass this test," then (after the very expensive "tahh-daahhh!!!"
fades again into silence, and all the marching-bands have gone home), what you are very likely to be left with is ... the latter.