Web Services and PHP Fundamentals

$_GET is the PHP superglobal array that contains query parameters passed through the URL after the ? character. The other options are wrong - $_POST (not $_POSTS) contains POST request data, and $_GETS doesn't exist as a PHP superglobal. Query parameters in URLs are automatically parsed into $_GET.

PHP is a recursive acronym where the first P stands for 'PHP' itself - the full name is 'PHP: Hypertext Preprocessor'. Originally it meant 'Personal Home Page', but it was recursively renamed. PEAR is a package repository, PECL is for extensions, and ProC is Oracle's embedded SQL - none of these are what PHP stands for.

session_start() is the correct PHP function to initialize a session - it must be called before any output is sent to the browser. The other options don't exist - session_init() and session_boot() are not valid PHP functions. Once started, session data becomes available through the $_SESSION superglobal.

To check if a cookie has been set, use isset() on the appropriate $_COOKIE superglobal key - for example, isset($_COOKIE['cookiename']). The setcookie() function is used to SET cookies, not check them. There is no iscookie() function in PHP.

UDDI stands for Universal Description, Discovery, and Integration. It's a standard for web service registries that enables businesses to publish and discover web services. The three core functions are: Description (what the service does via WSDL), Discovery (finding services), and Integration (connecting to services). Option A has the correct word order. Options B, C, and D permute these words incorrectly - 'Invention' and 'Invocation' are not part of the UDDI acronym.

XML-RPC is a simpler, lightweight protocol that uses XML over HTTP to make remote procedure calls, making it much easier to implement and use compared to the complex SOAP protocol.

XPath (XML Path Language) is a query language designed specifically for navigating through elements and attributes in an XML document.

BPEL stands for Business Process Execution Language, which is an OASIS standard executable language for specifying actions within business processes with web services.

BPEL stands for Business Process Execution Language, which is an OASIS standard executable language for specifying actions within business processes with web services.

XSLT (Extensible Stylesheet Language Transformations) is a declarative, XML-based language used for transforming XML documents into other formats, such as HTML, plain text, or other XML documents.

XSLT (Extensible Stylesheet Language Transformations) is a language designed for transforming XML documents from one format to another. While it can be used for formatting and includes XPath for navigation, its primary purpose is transformation. XPath is specifically for navigation, not XSLT. Options A, C, and D describe other XML technologies or aspects of XSLT.

XPointer is an XML specification that allows hyperlinks to point to specific parts of an XML document, not just the whole document. While XLink is used for creating hyperlinks, and XPath/XQuery are for navigation and querying respectively, XPointer specifically enables addressing into the internal structures of an XML document.

WS-I (Web Services Interoperability) Organization explicitly prohibits RPC-encoded style in its Basic Profile. Document/literal (or simply literal) style is WS-I compliant. RPC-encoded style creates interoperability issues because it relies on SOAP encoding rules which may not be consistently implemented across different platforms.

JSF (JavaServer Faces) is a component-based framework ideal for complex pages with multiple forms and complex UI logic, especially when developers have GUI application experience. JSP is simpler and more suitable for lightweight applications with minimal form complexity. JSF provides better state management and event handling for complex interfaces.