Web-Development-Applications Exam Dumps : WGU Web Development Applications (KVO1)

The onmouseover attribute in HTML and JavaScript is used to execute a script when the mouse pointer is moved over an element.

onmouseover Attribute: This event occurs when the mouse pointer is moved onto an element. It is commonly used to change styles or content of the element when the user interacts with it by hovering.

Usage Example:

Hover over this text to change its color to red.

In this example, the text color changes to red when the mouse pointer is moved over the paragraph.

References:

MDN Web Docs on onmouseover

W3C HTML Specification on Events

In CSS, a rule is composed of a selector and a declaration block. The rule is the entire part that defines how styles should be applied to elements matching the selector.

CSS Rule Components:

Selector: Identifies the HTML elements to be styled (e.g., body, .name, #item).

Declaration Block: Contains one or more declarations, each consisting of a property and a value, enclosed in curly braces {}.

Example Analysis:

Option A:

body {

background-color: white;

}

This is the full rule, consisting of the selector body and the declaration block { background-color: white; }.

Option B:

background-color: white;

This is just a declaration, not a complete rule.

background-color: white,

This is an incorrect declaration due to the comma, and not a complete rule.

Option D:

color: black

This is just a declaration, not a complete rule.

References:

W3C CSS Syntax and Basic Data Types Module Level 3

MDN Web Docs - CSS Syntax

To invoke the CSS provided, an ID selector is used. In CSS, the ID selector is used to style the element with the specific id attribute.

CSS ID Selector: The syntax for the ID selector is #id, where id is the id attribute value of the HTML element.

Usage Example:

#black {

color: black;

}

This CSS rule will apply the color: black; style to the element with id="black".

Example in HTML:

References:

MDN Web Docs on ID Selectors

W3C CSS Specification on Selectors