Hi,

The minimum eligibilty criteria to appear for CAT exam is as follows-

1. Candidates must hold a bachelor’s degree in any discipline from a recognized university/institute.
2. The admission is based primarily on their CAT scores, their entrance test score, and personal interview.
3. Open category candidates need a minimum of 50% in graduation, while students in reserved categories need 45%.
4. Applicants must score as per the prescribed norms in any national, state, and university level examination.

So as per the guidelines an NCWEB graduate is eligible to appear for CAT given that the candidate meets the basic requirements.