Markup and Web Languages

XML elements can be closed in two ways: with a separate closing tag () OR as a self-closing tag (). Self-closing tags don't require a separate closing tag, making the statement false.

Standard XML defines exactly 5 predefined entity references for special characters: amp, lt, gt, apos, and quot. Any other entities must be explicitly declared in a DTD or schema.

XML stands for eXtensible Markup Language, not 'eXtensible Modeling Language'. The statement incorrectly substitutes 'Modeling' for 'Markup', so it's false.

Every well-formed XML document MUST have exactly one root element that contains all other elements. This is a fundamental requirement of XML structure.

Unlike HTML, which typically collapses whitespace, XML preserves all white spaces in element content. Applications parsing XML receive the exact spacing written by the author unless explicitly trimmed.

This XML has two errors: (1) the opening tag doesn't match the closing tag (XML is case-sensitive), and (2) it's not a complete document - missing root element and XML declaration.

XML element names cannot contain the $ character. Valid names can only contain letters, digits, underscores, hyphens, and periods, but must start with a letter or underscore. The $ makes this invalid.

The RegularExpressionValidator control is specifically designed for pattern matching validation in ASP.NET. It validates input against a regular expression pattern, making it the right choice for pattern matching requirements.

ASP.NET web controls fully support CSS styling. Developers can apply CSS classes, inline styles, or use the control's style properties to customize appearance. Web controls render as standard HTML elements that can be styled using CSS like any other HTML element. This integration allows for consistent styling across web applications.

The .xlt extension is used for Excel template files in Microsoft Excel. When you save a workbook as a template, Excel uses the .xlt extension (in older versions) or .xltx (in newer Excel 2007+ formats). Templates preserve formatting and structure for reuse.

SOAP uses XML as its message format. SOAP envelopes are XML documents that contain the message data. HTML and DHTML are for web pages, CSS is for styling, and none of these are the message format for SOAP.

HTML stands for HyperText Markup Language. It is the standard markup language for creating web pages and web applications, defining the structure and layout of a document.