The NDA exam is conducted by UPSC for admission to the Army, Navy and Air Force wings of the NDA. This exam is a gateway for candidates looking forward to joining Defense Forces including Army, Navy and Air Force. This is a national level exam conducted twice a year: NDA I and NDA II to help candidates make a career in Defense services. National Defense Academy Naval Academy Examination will be a two-step process where candidates first need to take the exam and then qualify the SSB interview conducted by the Service Selection Board.