Applicants to the NDA are selected via a written exam conducted by the UPSC followed by extensive interviews covering general aptitude, psychological testing, team skills as well as physical and social skills, along with medical tests. Incoming classes are accepted twice a year for semesters starting in July and January, followed by extensive interviews covering general aptitude, psychological testing, team skills as well as physical and social skills, along with medical tests. Incoming classes are accepted twice a year for semesters starting in July and January