is scanner is sufficent

scanner is never sufficient to pass any exams... it is just for the end time preparation as the name suggests "SCANNER"....

i think it will give you a overview of topics not the core concepts....

It's just to get an idea of what kinds of questions asked in the past and check your preparations.

It maybe possible that some of the questions repeat from previous terms, but why do you have the approach of passing and not learning? I know a lot of people who manage to pass, but lack basic knowledge and make a fool of themselves in a lot of occassions.