Multiple choice technology web 2.0

Which statement is true?

  1. All XML documents must have a DTD

  2. All XML elements must be properly closed

  3. All XML elements must be lower case

  4. All XML elements must be uppercase
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Well-formed XML requires that every opening tag has a matching closing tag. A DTD is optional and not mandatory for all XML documents. XML tag names are case-sensitive but can be defined in either uppercase or lowercase, meaning there is no requirement forcing them to use only one specific casing.

AI explanation

To answer this question, let's go through each option to understand why it is correct or incorrect:

Option A) All XML documents must have a DTD - This option is incorrect because XML documents are not required to have a Document Type Definition (DTD). A DTD is an optional component that defines the structure and rules for the XML document, but it is not mandatory.

Option B) All XML elements must be properly closed - This option is correct. In XML, all elements must be properly closed using either a closing tag or a self-closing tag. For example, or. Failing to close elements properly will result in an XML syntax error.

Option C) All XML elements must be lowercase - This option is incorrect. XML is case-sensitive, which means that element names can be written in either uppercase or lowercase or a combination of both. For example, and are both valid XML element names.

Option D) All XML elements must be uppercase - This option is incorrect. As mentioned earlier, XML is case-sensitive, so element names can be written in either uppercase or lowercase or a combination of both.

The correct answer is B) All XML elements must be properly closed. This option is correct because it is a fundamental rule of XML syntax to properly close all elements.

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