Which statement is true?
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All the statements are true
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All XML elements must have a closing tag
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All XML elements must be lower case
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All XML documents must have a DTD
In XML syntax, every start-tag must have a corresponding end-tag (closing tag), making this statement true. XML elements do not have to be lowercase, and XML documents do not require a DTD to be well-formed.
To answer this question, you need to have a basic understanding of XML (eXtensible Markup Language). Let's go through each option to understand why it is correct or incorrect:
Option A) All the statements are true - This option is incorrect because not all statements can be true simultaneously. We need to evaluate each statement individually.
Option B) All XML elements must have a closing tag - This option is correct. In XML, each element must have a closing tag, except for empty elements, which are self-closing.
Option C) All XML elements must be lowercase - This option is incorrect. XML is case-sensitive, so element names can be in uppercase, lowercase, or a mixture of both.
Option D) All XML documents must have a DTD - This option is incorrect. XML documents do not necessarily require a Document Type Definition (DTD). A DTD is an optional component used to define the structure and rules of an XML document, but it is not mandatory.
The correct answer is B) All XML elements must have a closing tag. This option is correct because it aligns with the basic syntax and rules of XML.