The Ministry of Defence thru its recruiting organizations conducts many exams to recruit aspirants for its various departments and posts. The exams have 10th/12th/Graduation as minimum qualifications. Most are multi-tier examinations, having online tests, aptitude tests, physical tests and personality tests. The most common exams are NDA and CDS. Also, the IAF Group X and Group Y are also popular amongst those who want to serve the country.