Combined Defence Services (CSD) Examination is usually conducted twice in a year by the Union Public Service Commission (UPSC) in the months of May and October. The examination is conducted to select direct entry candidates as officers to the following four training academies.
(i) Indian Military Academy (IMA) Dehradun for permanent Commission in the Indian Army.
(ii) Officers Training Academy (OTA) Madras for Short-Service Commission in the Indian Army.
(iii) Naval Academy Goa, for Commission in the General Services in the Indian Navy.
(iv) Airforce Academy, Begumpet, Hyderabad for Commission in the Indian Airforce.
The selection process in which over 500 candidates are usually selected every time for all four academies, has the following three stages:
(a) Written Examination by the UPSC.
(b) Intelligence and personality test by the Service Selection Board (SSB).
(c) Medical Examination.