text: how candidiates are selected for central bureau of investigation(cbi)india?   candidates for cbi are selected by one of the following methods - direct recruitment, deputation, promotion by seniority, and limited departmental competitive examination. postings in the cbi is divided into 4 groups - a, b, c & d. you may please visit the official site of cbi  http://cbi.nic.in/ for further details.