What Is the NDA Examination and Why Is It Important for Defence Aspirants? The National Defence Academy (NDA) exam, conducted by the Union Public Service Commission (UPSC), is more than just a test — it's a gateway to one of India’s most prestigious and disciplined careers. Below is a professional and strategic overview of its key benefits: 1. Direct Entry into Indian Armed Forces Clearing NDA gives candidates a direct commission into the Indian Army, Navy, or Air Force as an officer, right afte