How to provide Best in SNUSAT+APT and what should I prepare and how should I attempt the examination

Yes sir i understand your query regarding exam so i would like to give you brief as follows:

Once you’ve taken the practice test, use the provided scoring guidelines to figure out your score. This will help you figure out what your strengths and weaknesses are. The sections where you did best are clearly your stronger ones, but you can also get more granular than that. Look back through the test to see which questions you missed and note down any patterns. Did you miss all of the data interpretation questions on reading? All the trig on math? Those are question types (and skill areas) you need to work on.

The SAT also provides guidelines on calculating your subscores in different areas. You can use this to get an additional idea of what particular areas you are strongest and weakest in within a section.