Hi Aspirant

Your question seems to be a little ambiguous as you have not specified some of the details so I cannot seem to understand what information you are exactly trying to look for.

You have not specified any particular competitive examination or counseling process. Without knowing these details answering this question is impossible.

In case second round is the last round of counseling and seats are still left after that there might be special round of counseling depending on the college.

In case you have any other doubt mention the details in the comments section below and I will try to help you out.