National Defence Academy & Naval Academy commonly referred as NDA is a national level entrance exam conducted by Union Public Service Commission (UPSC) for 10+2/HSC candidates who wish to pursue their career as commissioned officers in Army, Navy, Air Force and Indian Naval Academy Course (INAC). NDA is conducted twice a year for recruiting around 800 officers’ vacancies Indian Army, Navy, Air Force. Generally, NDA I & II have approximately 400 vacancies .