What about practical exams? Are they conducted again, or are the same marks are given if a student fail in XIIth Board examination in a particular subject?

Dear Student,

As per CBSE official notification, you do not have to appear for practical examination and the same marks are carried forward if you were passed on that particular subject. In case you have failed in both theory and practical, then you will have to appear for both the examinations, otherwise you can only appear for theory exams and the marks will be updated.