[artplumber]

Sounds like you have two questions. For memory, you have to figure out how you learn best. Eg/if I read it I'm asleep. However, if I listen to a lecture (and take notes) I can do well on a test without ever buying the textbook. Doing questions is also helpful. You have to find what's best for you. BTW research suggests that listening to something with a rhythm (like rock) helps one remember better.

Test taking is a completely different skill. Thing that works the best is boiling the question down to it's essential elements, and asking yourself what the tester "wants". Safety above all else, lower costs, multiple redundancies etc.