Hello,

I hope you are doing fine, Both of these exams are different from one another, so we generally can’t compare these two. BITSAT is for engineering and NDA is for Defense. As the exams are different so the question papers would be different as well.

As NDA is not only about written exam i will try to include points which can help you in SSB as well :

1) Practice Using a study material ( I suggest Objective General English by S.P Bakshi)

2) Read English newspaper ( My suggestion is Hindu or Indian Express)

3) Read a lot of books it will help you in improving your vocab .

4) Think in English ( it will help you in structuring of sentences , helpful for SSB as well)

5) Watch English movie , I would suggest you British movies

6) When watching sports try to watch in channels having English commentary

7) Speak English to your friends and your family members (Don't be shy , shy is temporary but victory is permeant)

08) Talk in front of a Mirror , simple but effective

I hope you find this information helpful. I wish you all the best for your future.

Good Luck