What is the exam pattern of the NDA (National Defence Academy) exam in 2025? Indian Armed Forces through the NDA (National Defence Academy): 1. Prestigious and Honorable Career Joining the NDA means becoming a part of one of the most respected institutions in India. NDA cadets are trained to become future officers in the Indian Army, Navy, or Air Force, starting their careers with immense pride and responsibility. 2. Training with Stipend and Full Support All cadets receive training for 3 years