A Complete Guide to NDA Exam Preparation https://nda-coaching-in-dehradun.blogspot.com/2024/04/a-complete-guide-to-nda-exam-preparation.html DA is an entrance test for a career in defense forces including the army, navy, and air force. Conducted annually by UPSC, it is considered a difficult exam due to the mixed syllabus. Students who have passed the 12th class or appearing are eligible for NDA. It is advisable to go for the best NDA coaching in Dehradun or at least follow expert tips.