MCA

No, it will be quite hard for you to get admission for MCA, because it is a very less marks and you have to change your preferences.

No, you can't do MCA. You have to pass BCA to take admission in MCA.

Kindly visit this link:
https://www.shiksha.com/university/jnu-jawaharlal-nehru-university-Delhi-4225

Yes, you can get direct admission in any private college for MCA with 57%.

Hi there, All the forms for this session have been filled out and last dates are over. If there is any update keep checking the official AMU Website
https://www.amucontrollerexams.com/
Best of Luck!

If you are going for MCA then maths and physics is compulsory, you should have maths and physics in your BCA and in MCA. You should have to try for other courses which you had studied like choose those subjects on which have command.

Please let me know for which college or University question paper you are looking for it will help me to find the college question paper and share you the link to access them.

No you cannot you have to start with 1st year.

They upload the paper on the official website you can get the paper from there itself.