Sir, I have completed my graduation last year. Please tell me about CBI exam.

Hi..
You must be graduate in any discipline and age must be between 20 to 25 years as on 1st January of of the examination year.
 
Marking Scheme:
Total Marks :200
Time: 2 hours
 
Paper -I General Test
General Intelligence & Reasoning : 50
General Awareness  75
Paper II English Language
Language Comprehension
Communication/writing 
Ability Test
You can also check official website of CBI for more detailed information