Does a candidate need to apply individually to different institutes that accept XAT score?

I am in the final year of my graduation, what percentage should I fill in the form?

Candidate need to enter the aggregate percentage of marks obtained till the time of filling the form.

Does a candidate need to apply individually to different institutes that accept XAT score?

XAT is a common test for admission in management programmes of XLRI and XAT Associate Member Institutes. If a candidate is interested in XLRI or any other XAT Associate Member Institutes, he/she need to register and apply separately.

Is there any negative marking?

Yes, there is negative marking for wrong answers. 1/4th of the mark is deducted for answering it incorrectly.