the ? is a query string: In the World Wide Web, a query string is the part of a uniform resource locator (URL) that contains data to be passed to web applications such as CGI programs.
When a web page is requested via the Hypertext Transfer Protocol, the server locates a file in its file system based on the requested URL. This file may be a regular file or a program. In the second case, the server may (depending on its configuration) run the program, sending its output as the requested page. The query string is a part of the URL which is passed to the program. Its use permits data to be passed from the HTTP client (often a web browser) to the program which generates the web page.WIKIThe # is a fragment identifier: In computer hypertext, a fragment identifier is a short string of characters that refers to a resource that is subordinate to another, primary resource. The primary resource is identified by a Uniform Resource Identifier (URI), and the fragment identifier points to the subordinate resource.
The fragment identifier introduced by a hash mark # is the optional last part of a URL for a document. It is typically used to identify a portion of that document. The generic syntax is specified in RFC 3986. The hash mark separator in URIs does not belong to the fragment identifier.wikihttp://en.wikipedia.org/wiki/Fragment_identifier
