There r books online now a days. You can also give mock test to predict your scoring.
Go for online books and gk quizzes
Specific course related entrance exam books are available in the market. They can be of great help!
Sample Papers is all you need
Go through last 2-3yrs question papers.
Do sample papers, that might help!
see youtube videos and give mock tests
Every course has there own separate books, you can order online like B.A Eng hon DU entrance. It's available on amazon
Previous year question papers are must