Hello student the only way to get command over questions asked in entrance examination is practice, practice as much as you can so that you can easily solve conceptual problems. Clear your basic concepts first make a pad of errors you make in mock tests and then go through it daily.

Prefer NCERT to build your basic concept and make sure you do each and every example and exercise questions of Ncert before jumping to a reference book.

Feel free to comment if you have any doubt

Good luck