Dear student, you are definitely eligible for CAT entrance exam even if you have a diploma and later on pursuing your graduation in computer science. The only eligibility is that you need to pass graduation with at least 50% marks if you belong to general category. You won't be restricted admission on the basis of that you have pursue diploma.

Hello Subhangi,

It would have been better if you had mentioned the complete question. It seems to be incomplete therefore the answer to your question cannot be provided. I aslo wish luck to you for your 1 year completion in the diploma course in Commercial and Computer Application.

All the Best. Thank You.