What is the UPSC CAPF (AC) exam?
The UPSC CAPF (AC) examination is conducted by the Union Public Service Commission to recruit Assistant Commandants — Group A gazetted officers — into the Central Armed Police Forces: the Border Security Force (BSF), Central Reserve Police Force (CRPF), Central Industrial Security Force (CISF), Indo-Tibetan Border Police (ITBP) and Sashastra Seema Bal (SSB). Unlike a constable-level exam, this is an officer-entry examination that requires a Bachelor's degree, and successful candidates go on to command troops in border guarding, internal security and industrial protection.
Selection has several stages: a written examination of two papers, a Physical Efficiency Test and Physical Standards Test (PET/PST), a Medical Standards Test, and an Interview/Personality Test. Paper I — General Ability & Intelligence — is objective with 125 questions for 250 marks and carries one-third negative marking, so accuracy under time matters. Paper II — General Studies, Essay & Comprehension — is descriptive and tests writing, analysis and language skills. The PET/PST and medical are qualifying, and final merit combines the written marks with the 150-mark interview.

