dear aspirant,

The rounds have been designed in a way that all eligible students get a seat. And there are more number of seats for engineering than the required number.so its wiser to wait for two more rounds.

best of luck.

No, you don't have to. Once you're alloted a college, you need to exercise Freeze/Float/Slide option, which can be done from anywhere, that is through your account on the admission portal, at home or at the ARC.

But once you finalize the college you want admission in, you need to visit the ARC along with the verified documents from the FC.