NDA Exam Eligibility The NDA (National Defence Academy) exam is a highly competitive exam conducted by the Union Public Service Commission (UPSC) for candidates who wish to join the Indian Army, Navy, or Air Force as an officer. The eligibility criteria for the NDA exam are as follows: Nationality: The candidate must be an Indian citizen or a subject of Bhutan or Nepal. Age Limit: The candidate must have been born between January 2, 2004, and January 1, 2007, for the NDA (I) 2023 exam. For the NDA (II) 2023 exam, the candidate must have been born between July 2,