To get an interview first you have to pass the exams. Trust me within a year you will have forgotten most of it anyway, so you need to work smart and remember the important stuff. You can learn an awful lot from the question banks and anything you don't know you can supplement with Google and YouTube. As long as you know why the answer is the answer it really doesn't matter how you learned it. It's very noble that you want to do things the hard way, but it is just a test and when you apply for jobs you will have plenty of time to study up again.