The meaning of the symbol "?" (question mark) in the URL?

Question

HTTP headers

1) Is the character always "?" (question mark) indicates that a request is made through the url with the transfer of parameters to the server using the GET method? Can the character "?" (question mark) be used in the URL in some other way?
2) How many requests can be sent to the server at a time in one URL? That is, can the symbol "?" be used in one url? (question mark) more than once?

Answer 1

Yes, you can send multiple question marks to the server, but this will be a non-standard request.
( for example )
The structure is briefly described here , more details in the specification (link inside).