Is it possible that a URL or link does not point to any resource (is null)?

In the context of a URL or link, the value null (or nullptr in C++) indicates the absence of a pointer to any resource. In real applications, URLs are usually represented as strings, and an empty string or missing pointer can mean that the link does not point to any resource.

For example, if you have a pointer to a URL string:

const char* url = nullptr; // no resource link

This means that the URL is not set. In web development or network protocols, a URL cannot be "null" as such, but it can be empty or absent, which is equivalent to the absence of a resource.

Thus, a situation where a URL or link does not point to any resource is possible and is usually expressed through an empty string, a null pointer, or a special value indicating the absence of a resource.