Combine Defence Services is the name of an examination conducted by the UPSC(Union Public Service Commission) for Bachelor degree/Equivalent twice a year in the month of February & November consisting of 3 papers GK, English & Math (100 marks each). For admission in the Indian Military Academy, Air Force Academy, Indian Naval Academy & Officers Training Academy, for recruitment of Officer Cadets/Gentleman Cadets in the Armed Forces i.e, Army, Navy & Air Force. Those who got selected in the written test are called for SSB(Service selection Board) interview (Which is likely to be replaced by Denovo selection process 3 days) with several stages (5 days existing) and recommend candidates further go for Medical test. Final recommend candidates by the Medical board will be arranged accordingly through All India merit list & thus finally joins their respective Academy. After a rigurous training for about 1-1½ years those Gentleman Cadets pass out as commissioned officers – Lieutenant (Army), Sub Lieutenant (Navy) & Flying Officer ( Air Force) respectively.