Certificate

It's good if you go with Outbound sales and outbound marketing certification.

Hello,
For sales and marketing- Inbound sales and Inbound marketing certification is best fit and you may also go with outbound sales and outbound marketing. For Business Operations-Block chain is the best certification.

It's good to have a decent knowledge of the courses taught in classes but what happens if in a job interview there is a tie between two guys and of them one is who had knowledge of supposedly, MATLAB (or some other platform with a decent coding) or say has good knowledge of Any cad Software, that too certified from a good and reputed place. I think you get the point. Ever heard, "All dots are connected". See, the technical knowledge apart from the one that is taught in the mainstream class shall definitely be helpful in every field, be it research or job perspective.

If you have submitted your application mentioning any specific caste or PWD or other reservations, you are supposed to submit proof for that during admission, if not your candidature would be cancelled.

Yes you can, use your provisional certificate for admission. You can submit the original degree certificate when you get it.

You can get IELTS certificate by writing the IELTS exam, any other methods of securing the certificate would result in getting permanently banned from applying for any visa and possible criminal case.