What is the main function of a file extension?

Question

Responses

to indicate how much space the file takes up

to indicate how much space the file takes up - no response given

to allow the file to be extended to new uses

to allow the file to be extended to new uses - no response given

to indicate which version of the file it is

to indicate which version of the file it is - no response given

to indicate which program is needed to open it

Answer 1

The main function of a file extension is to indicate which program is needed to open it. File extensions help operating systems determine how to handle and open files by associating them with specific applications.