The Full Form of NDA Exam is‍ National Defence Academy.

The National Defence Academy (NDA) is the joint services academy of the Indian Armed Forces, where cadets of the three services, the Army, the Navy and the Air Force train together before they go on to respective service academy for further pre-commission training. The NDA is located in Khadakwasla, Pune, Maharashtra. It is the first tri-service academy in the world.

The alumni of NDA include 3 Param Vir Chakra recipients and 12 Ashoka Chakra recipients. NDA has also produced 27 service Chiefs of Staff till date. The current Chiefs of Staff of the Army, the Navy and the Air Force are all NDA alumni from the same course. The 137th course passed out on 30 November 2019, consisting of 188 Army cadets, 38 Naval cadets, 37 Air Force cadets and 20 cadets from friendly foreign countries