The entrance examination conducted by NTTF Bangalore is primarily based upon subjects taught in schools up till High School. Those topics would be sufficient for the exam,
If you have good academic records and are good at grasping concepts quickly, then you can remember all of them once and attempt the examination. If you do not perform that well, you can refer to the topics being asked in the examination again.
You will find basic questions from Physics, Maths, and Chemistry. The entrance exam is not tough and you can surely secure a good score to get admission at the institute.
Before getting admission at the institute, it must be noted that the quality of education has been declining as NTTF is allowing a large number of students to get admission at the institute.