Hi,

Back Student can also eligible for CAT exam. As per eligibility criteria general candidates must be graduate with minimum 50% marks and for SC/ST it is 45%. Candidate have to clear their exam at the time of admission.

Check below the Eligibility criteria of CAT

1. Bachelor’s degree - Bachelor’s degree in Engineering/Technology (4 years after 10+2/Post B.Sc./Post Diploma) or B.E/B. Tech equivalent examinations, of Professional Societies, recognized by MHRD/UPSC/AICTE (e.g., AMIE by Institution of Engineers-India, AMICE by the Institute of Civil Engineers India).
2. Equivalent to Bachelor’s degree - Any Qualification recognized by Association of Indian Universities, New Delhi which is equivalent to a Bachelor’s Degree awarded by UGC recognized University/Institutions.
3. Other - Cases not covered above equivalency certificate to be produced from Association of Indian Universities, New Delhi

You need to pass before the admission procedure to qualify. It will not affect your career in MBA. As, it all depends on how much you score in exams and which University or College you have done your MBA in. If you still have doubts feel free to comment. Hope this helps.