Hello Jitendra Suraj!

Two different agencies conduct examinations to fill vacancies in CBI. They are ; UPSC and SSC

To become a group A officer in CBI, you must choose Civil Service Examination conducted by UPSC and become an IPS officer.

To join as Sub Inspector in CBI, you must go through SSC CGL examination.

To become a Sub Inspector in Central Bureau Of Investigation (CBI ), you must pass SSC Combined Graduate Level Exam.

CBI Sub Inspector Eligibility Criteria :

To become a CBI Officer you must clear SSC CGL examination and you must the have following qualifications :

Educational Qualification -

Must have a Bachelor's Degree from a Recognized University (The candidates appearing in the final year of their graduation can also apply, however they must possess Essential qualification on or before 01-August of the year of notification) .

Age Limit -

20-30 years for General Category

20-33 years for OBC Category

20-35 years for SC/ST Category