Hello,

To be eligible to appear for Combined Defence Service Examination conducted by Union Public Service Commission the minimum education qualification requirement is Bachelor's Degree from a recognised board. To apply for Indian Naval Academy you must have passed B.Tech, to apply for Indian Airforce you must have passed B.Tech or Bachelor's Degree and must have studied Mathematics and Physics in 10+² level. If you want to join Indian military academy Or Officers Training Academy you must have passed Bachelor's Degree in any discipline. Female candidates are eligible for OTA (Women), male candidates are eligible for INA, IAF, IMA and OTA (Men).

Diploma is not equivalent to bachelor's degree so you are not eligible to apply for CDS.