For Army wing of NDA: You should have passed class 12th examination.
For Air Force and Naval Wings of NDA: You should have passed class 12th examination with Physics and Mathematics.
NDA/NA Exam Pattern
There are two papers with objective type questions:
|Mathematics||2 hours 30 minutes||120||300|
|General Ability Test||2 hours 30 minutes||150||600|
The papers in both the subjects consist of objective type questions only. There is penalty for wrong answers. General Ability Test paper is divided into two parts - Part A and Part B. Part A has 50 English questions and Part B has 100 General Knowledge questions.