Dear aspirant !

Hope you are doing great ! See, nda is not a tough exam it requires time and accuracy only if you know basic concept then you can easily qualify this exam , firstly for GAT section which is of 600 marks ,finsih your books till 10 th level ,i e.  biology ,social science, comes of 10th level ,and in class 11 start doing focus on math only ,physics also comes from 10+2 level so focus on that also. Makes your short notes ,for gk and current ,start watching news daily at least 1 hour or read newspaper ,follow these things from starting of 11 ,you will definitely crack the exam easily .

For more information about nda . Visit here ;-

https://www.google.com/url?sa=t&source=web&rct=j&url=https://competition.careers360.com/articles/nda-eligibility-criteria/amp&ved=2ahUKEwicqLuAiIr3AhXYRmwGHUO-AB8QFnoECAYQAQ&usg=AOvVaw1I0C9hFQPh7j-5oJDaK70E .

Hope it helps you !!

Thanking you