If the candidate has done the NCC and have NCC ‘C’ certificate with minimum ‘B’ grade. You can apply for the NCC Special entry in the Indian air Force, Indian Navy and Indian Army. In every force in India has this NCC Special Entry scheme. Through this entry candidates become officer in the service. If you are applying through the NCC special entry. You will not have to appear for the written test. You will be directly called for the SSB interview. Clearing SSB Interview is mandatory for all the entry to become an officer in the Indian Armed forces. But the Candidates of NCC Special Entry will be given some relaxation. This relaxation will not be in SSB Interview. You have to clear the SSB interview in SSB manner. In the NCC special entry Scheme. There is very less competition in this entry as compared to other entries of defence. Check- Indian army clerk exam books