The "Combined Defence Services" (CDS) Examination is conducted twice a year by the Union Public Service Commission for recruitment into the Indian Military Academy, Officers Training Academy, Indian Naval Academy and Indian Air Force Academy. Those Candidates qualified in the written exam. Then they are shortlisted for an interview by a Services Selection Board which evaluates a candidate's suitability for a career in the Indian Armed Forces. The SSB interview lasts for approximately a week, during this process a candidate undergoes various physical and psychological tests to ascertain whether or not he is officer material.