To open a link in a new browser window, use the target attribute with value "_blank": . The values "new" or a new attribute are not standard HTML. The target="_blank" is the correct way to achieve this behavior.

HTML checkboxes are created using the tag with type="checkbox": . There are no or tags in HTML. The type attribute must be exactly "checkbox", not "check".

The bullet points in the example (·Dogs ·Cats ·Birds) indicate an unordered list, which uses

JavaScript is embedded in HTML using the tag. There are no , , or tags in HTML. The SCRIPT tag is the standard way to include client-side scripting code.

The XML declaration must start with . Option A is correct. Option B uses the wrong tag name without the question mark. Option C uses /> instead of ?> which is incorrect. Option D is missing quotes around the version value.

A well-formed XML document must have exactly one root element containing all other elements. This XML has four root-level elements (, , , ), which violates XML's single-root rule, making it invalid.

XML elements can be empty using self-closing syntax like
or . Empty elements are perfectly valid in XML and are commonly used for elements without content.

CDATA sections in XML use the syntax to tell parsers to treat the content as literal text, ignoring any special characters or markup within. Option A shows the correct syntax.

In HTML, heading tags range from

(largest) to

(smallest). The tag contains metadata like title and styles, not visible content. Option A is correct.

Modern HTML uses CSS for styling. The correct inline CSS approach is style="background-color:yellow" (option C). The background attribute in option B is deprecated HTML4 syntax.

The target="_blank" attribute opens a link in a new browser window or tab. This is the standard HTML approach for opening links in new windows (option A). Target="new" is not a valid HTML value.

HTML checkboxes are created using the tag with type="checkbox" (option D). There is no dedicated or tag in HTML. Checkboxes are a type of input element.

Unordered (bullet) lists in HTML use

tag creates numbered lists, is for underline, and

is for definition lists.

JavaScript is embedded in HTML using tags (option D). There are no , , or tags in HTML. The script tag is the standard container for JavaScript code.

onBlur, onClick, and onFocus are JavaScript event handlers (option D) that execute code when specific user actions occur - losing focus, clicking, or gaining focus on an element. They are not elements, properties, or methods.

JavaScript arrays can be created with new Array("item1","item2") (option A) or more commonly with array literals ["item1","item2"]. Option A shows the correct constructor syntax with comma-separated string values in parentheses.

The correct syntax to open a new window in JavaScript uses the window.open() method with parentheses. Option A shows w2=window.open("http://www.w3schools.com"); which is correct. Option B is missing parentheses, and options C and D use the non-existent window.new() method.

In XPath expressions, the double slash // selects nodes from the current node downward regardless of the document structure, and the asterisk * matches any element node. Together, //* selects all element nodes in the document.