Question

Is there more than one exit and entrance point for the same country? If yes why?

Answer 1

because both have existing point

Answer 2

The boarder of almost every country is connected to more than one country.
That point can be used for both entry and as an exit.
The reason behind it is that point can be used for people to visit other state of for then to leave that state and return back.
Another reason for it is to increase the import and export of a country.
Suppose there is a country whose border from one side is connected to the sea and other to the land. That country will use both for import export through sea and through land