1. I could not find the specific advertisement of Government of Maharashtra. However, from my own experience in the Government sector, I can state that, in case of the job of Computer Operator, no specific Degree or Diploma is sought. Graduation in any discipline with adequate knowledge of MS-Word, MS-Powerpoint and MS-Excel is generally required for such positions. Good typing speed in the computer is also desirable.
2. As you have completed B.Sc. in Computer Science, you will be easily eligible to apply for the post of Computer Operator under the Government of Maharashtra, subject to not crossing the upper age limit specified for the post.
Beware! I question everything and everybody.