Hello suraj,

As you mentioned that in most of your documents there is a mistake in your name so it will be advisable if you request for the correction before you give any government exam.

Matters related to change in name , incorrect spellings are treated very strictly as they are the proofs of your sole indentity. Follow only one pattern. Either request for a  change the name in marks card and certificate or go for the alteration in adhar card and bank. Well the second one will be the best choice. You can easily change your adhar card details as well as bank details.

And then try to make these changes equivalent in all documents.

If your Cognizant profile name matches to all the documents provided by you, then there will be no problem.

Hope it might have helped.

Regards