The NDA-Naval Academy Examination-I is a national-level entrance test conducted by the Union Public Service Commission for admission to the National Defence Academy and Naval Academy. It is open to unmarried male and female candidates who have completed or are appearing in Class 12 or equivalent. The examination assesses candidates' aptitude, general knowledge, and physical fitness for entry into the armed forces.

Candidates must be Indian citizens and unmarried. For the Army Wing of the National Defence Academy, applicants should have passed Class 12 or equivalent. For the Air Force and Naval Wings, candidates must have studied Physics and Mathematics at the Class 12 level. There are no income or category restrictions, but candidates must meet the age and physical standards set by the commission.

Applications must be submitted online through the official UPSC portal. Candidates need to register, fill in personal and academic details, upload required documents, and pay the application fee. After submission, a printout of the application form should be kept for future reference. The official page lists the current application process and fee details.