t of basic secondary school mathematics. Union Public Service Commission (UPSC) conducts the “Combined Defence Services” (CDS) Examination twice a year by the name of CDS I and CDS II. The exam is conducted for recruitment into the Indian Military Academy, Officers Training Academy, Indian Naval Academy and Indian Air Force Academy. The Notification for the examination is usually released in the months of October and June, and the examinations are conducted in February and November respectively. Only unmarried graduates are eligible to sit for the exam. Successful candidates are admitted into the respective Academies after an interview conducted by the Services Selection Board.