How does the server find the requested file?

Question

Arrays

When requesting, for example, an html file, does the server or OS look for the file in a loop, sorting through their names, or does it immediately take the right one? Is it the same story with arrays? For example, to get to the 11th element, all the previous ones are looked through?

Answer 1

When requesting, for example, an html file, the server or OS looks for the file in a loop

Why, if there is a way?
In a linked list - yes, by enumeration. In a hash table, usually without enumeration, i.e. in O(1) on average (assuming no collisions). Depends on the algorithm.