How is the array filled if the numbers are requested in reverse order, and the array is filled in direct order?

Question

Programming

If the numbers are requested in reverse order, and the array (one-dimensional) is filled in direct order, then why consider direct and reverse order? Regarding the coordinates of the array (asks from the last to the first, and enters from the first cell to the last) or the direct order of filling relative to the reverse order of the request (that is, it asks from the last to the first, and then also fills from the last cell to the first)?

Answer 1

First option.

Answer 2

This is called a stack - first in, last out.