The NDA exam, conducted by UPSC, followed by an SSB interview, is the selection process. Combined Defence Services (CDS): Graduates can join through the CDS exam, also conducted by UPSC. Successful candidates undergo training at the Indian Military Academy (IMA), Air Force Academy (AFA), These entries do not require a written exam but are based on merit and followed by an SSB interview. It includes a written exam followed by an SSB interview.