There are only two ways of clearing an exam. The first involves rigorous reading of the books and understanding the fundamental concepts which a subject is trying to teach, and develop a framework.
Once you have a framework, you then assimilate additional information (either via theory or via practical in labs) on that framework to see whether it makes sense or not.
If you are able to do it, the new information is understood and is stored in your knowledge repertoire to be recalled at ease and also to help you understand other things in future.
If you are not able to do it, you improve upon the framework.
The second way, which if not everyone, at least 90% of engineers will agree upon is as follows.
[Read more…] about Wit, Wisdom, Charlie: Elementary Worldly Wisdom from Charlie Munger