For Christ's sake, guys, he is only just starting! The one thing he should not be doing yet is going anywhere
near a question bank! I strongly suspect that Alex Wittingham would back me on that one.
I would suggest Nav doesn't look at any actual JAR questions until he has finished the main teaching section of the course. At that point representative questions are useful to direct revision, although the exact questions and the source are not important. The question banks are not some magic route to supreme pilothood. They are a revision aid.
Before you start on the course, Nav420, make sure you know the PPL material, and the important stuff is very familiar to you. That is assumed knowledge before starting the ATPL course and will mean the classes make far more sense. Secondly you might brush up on Maths, especially if you are not confident with basic algebra and trigonometry.