What are the key parts of a URL?

• A. Uniform Resource Locator; scheme and domain only.
• B. Uniform Resource Locator; scheme, domain, path, and query string.
• C. Universal Resource Link; domain and path.
• D. Uniform Resource Locator; protocol and domain only.

Answer: (B)

Understanding URLs means recognizing the parts that locate a resource and, if needed, pass data to the server. A URL typically has a scheme (the protocol, such as http or https), a domain (the host name), a path (which resource on that host to fetch), and a query string (parameters after a question mark that can customize the request).

The best choice reflects all of these pieces: scheme, domain, path, and query string. For example, in https://www.example.com/search?q=URL, https is the scheme, www.example.com is the domain, /search is the path, and q=URL is the query string. The query string is what carries data like search terms or filters without changing which resource is being asked for.

The other options leave out important parts. Saying only the scheme and domain doesn’t specify which resource on the site to fetch or any extra data to send. Saying domain and path omits how the resource is accessed. Calling the name “Universal Resource Link” isn’t the standard term and also misses the required scheme. Saying protocol and domain omits the resource location and any data parameters.