Computers & IT (Non-Engg)

First of all, a candidate need to score at least 45%-60% in order to be eligible for admission, percentage requirement is different for every university. It'll be beneficial for you if you have studied Maths and computer Science in your class 12th. Some colleges might also provide admission on the basis of personal interview. If you want to learn programming languages which you will be studying in your BCA course then you can check out this app which is specially designed and developed for BCA students.

MCA would be a better option. Admissions in MCA course is given on the basis of all India basis entrance examinations. Many top colleges and universities in India offer admission on the basis of merit list prepared as per the marks scored in the entrance test. Generally, the entrance examination is based on Mathematics and reasoning. There is a different exam pattern of each entrance test. The best universities are: Delhi University, Delhi
Jamia Millia Islamia, Jawaharlal Nehru University, Lovely Professional University, Jalandhar
The University of Pune, Dr. Bhim Rao Ambedkar University, Agra
Banaras Hindu University
Anna University.

You are a commerce student (12th) and you have not studied mathematics in 12th but you will study mathematics in graduation if you choose BCA and would be eligible for doing MCA. The course emphasizes on the latest programming languages and tools to develop better and faster applications. BCA makes a base while MCA adds a specialized touch in the subjects studied in BCA.Eligibility: Students who have done their graduation in any discipline like Science, Commerce, Arts, Engineering, BCA / BSc IT/ BSc CS from any recognized university are eligible to apply for this course

It is not permissible, only three year MCA programme through valid score is acceptable. Placements have been great here and so is Brand value.

Yes, you can do after BBM. Get all details on eligibility, scope and career and Jobs about CS below:
https://www.shiksha.com/career-as-company-secretary-cc-30.

You may try Durga Devi Saraf, Aleksh Dinesh Modi, Amrut Mody, Atharva, Vidyalankar, Don Bosco, Indira Pune, as Tier two colleges for MS course. For PGDM, you can get easily at above-mentioned colleges.

Yes, you can attempt this examination if you have graduation.

CMAT is not compulsory, CMAT is only accepted in india. There maybe other exams depending on the course and country.

Both commerce and Science stream students can pursue this course provided they had maths in 12th. Also, if the students had computer Science as their subject, it will be good.