Hello,

It would be better if you ask regarding this to your seniors or any faculty member. They can guide you better. These are academic related and it is not known to outside persons. You can ask any faculty member you know regarding this as they might have face this somewhere or might know regarding it from a person who did it.

for 12th admission is based on the qualification of 10th. It is mostly direct admission but in highly recognized colleges they do keep some screening exams.

Hope it helps!