Hey arun

NDA National Defence and Naval Academy Exam is conducted by UPSC every year(twice ) to induct officers into the Army, Navy and Airforce. NDA Exam is an objective time exam which consists of papers from subjects like Mathematics, English and General Awareness.it has 2 papers carying 300 and 600 marks respectively.

The written test is followed by SSB, Medical Examination and all India Merit. Only Boys who have passed class 12th (Or are appearing) and meet the specified age criteria are eligible .

16 ½ to 19 ½  years as of first day of the month in which course is due to commence.

For army wing- 10+2 passed student from a board or university and for airforce- 10+2 passed student with physics and mathematics.

hope this helped

all the best

for more information about NDA go through the following link:

https://competition.careers360.com/exams/nda