XML, Ajax, and Enterprise Web Technologies

Entity beans represent persistent data and can be shared between multiple clients accessing the same entity. They MUST have an EJBObject interface for remote access. Options A and C are both correct characteristics of entity beans.

When passing Remote objects to/from remote methods, the stub (proxy) is passed, not the actual remote object. The stub runs on the client side and communicates with the remote object via RMI. This is fundamental to how Java RMI works.

SmartClient is an enterprise-grade web application platform that provides a zero-install Ajax engine, rich UI components, and robust client-server databinding systems.

AJAX (Asynchronous JavaScript and XML) is designed specifically for asynchronous communication between the browser and server. This allows web pages to update partially without reloading the entire page. Synchronous communication would block the browser, and socket connections are not the primary mechanism AJAX uses.

Due to browser security sandboxing, client-side scripts running in a secure web browser are restricted to web-related operations and cannot access the local file system or execute system-level commands.

SmartClient is a comprehensive web framework that supports multiple communication protocols, including Web Services (WSDL/SOAP), Direct Web Remoting (DWR), and custom JavaScript RPCs.

The Messaging module is part of the commercial/enterprise editions of SmartClient and is not included in the free, open-source LGPL distribution, which contains Core, Foundation, and Containers.

To answer this question, the user needs to know what XML stands for.

The correct answer is:

C. eXtensible Markup Language

Option A is incorrect because "eXtra Modern Link" is not the correct expansion of XML.

Option B is incorrect because "X-Markup Language" is not the correct expansion of XML.

Option D is incorrect because "Example Markup Language" is not the correct expansion of XML.

Therefore, the correct answer is option C, "eXtensible Markup Language".

A Document Type Definition (DTD) defines the legal building blocks of an XML document, describing its structure and the data elements it contains.

XML declarations must use the processing instruction syntax with . The version attribute is required, and the declaration must not have a trailing slash like regular tags. Option A shows the correct syntax.

DTD stands for Document Type Definition. It defines the structure and legal elements of an XML document. The other options are either made up or incorrect expansions.

This XML document is well-formed because it has a proper XML declaration, a single root element (), all tags are properly nested, and every opening tag has a corresponding closing tag. No attributes are without quotes, and element names follow XML naming rules.

This is NOT a well-formed XML document because it lacks a single root element. XML documents must have exactly one root element that contains all other elements. Here we have four sibling elements (, , , ) at the top level.

XML attribute values MUST always be enclosed in quotes (either single or double quotes). This is a strict requirement in XML syntax. Unquoted attributes will cause parsing errors. For example: is correct, but is invalid.

XSL stands for eXtensible Stylesheet Language. It's a family of languages used to transform and render XML documents. XSLT (XSL Transformations) and XSL-FO (XSL Formatting Objects) are parts of the XSL family. The other options are incorrect expansions.

BBE (Broadband Engine) messaging architectures utilize both JMS (Java Message Service) for asynchronous messaging and SOAP (Simple Object Access Protocol) for synchronous web services.

JMS stands for Java Message Service, which is a Java API that allows applications to create, send, receive, and read messages in enterprise messaging systems.

Bugzilla is a widely used, open-source web-based general-purpose defect tracking and bug reporting tool. It is not designed for writing test cases or generating XML.