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WGU Web Development Applications Sample Questions (Q51-Q56):

NEW QUESTION # 51
Given the following code:
```javascript
var data;
```
What is the value of `data` when the code runs?

A. An empty string
B. A single character
C. Null
D. Undefined

Answer: D

Explanation:
> "In JavaScript, any variable declared but not assigned a value is automatically set to `undefined`." Example:
```javascript
var data;
console.log(data); // undefined
```
References:
* MDN Web Docs: undefined
* JavaScript Guide: Variables
---

NEW QUESTION # 52
A web developer need to ensure that a message appears if the user's browser does not support the audio files on a web page.
How should this designer code the audio element?

Answer: D

Explanation:
To ensure that a message appears if the user's browser does not support the audio files on a web page, the developer should use the <audio> element correctly. The <audio> element supports fallback content, which is displayed if the browser does not support the specified audio formats.
* Correct Usage:
* Fallback Content: Place the message as fallback content inside the <audio> element. Browsers that do not support the audio format will display this message.
* Example:
<audio>
<source src="audio/song.mp3" type="audio/mpeg" />
No mpeg support.
</audio>
* Explanation of Options:
* Option A: Incorrect. The alt attribute is not valid for the <source> element.
* Option B: Incorrect. The alt attribute is not valid for the <audio> element.
* Option C: Incorrect. The alt attribute is used incorrectly in the <audio> element.
* Option D: Correct. The message "No mpeg support." is placed correctly as fallback content inside the <audio> element.
* References:
* W3C HTML5 Specification - The audio element
* MDN Web Docs - <audio>
Using the fallback content inside the <audio> element ensures that users with unsupported browsers receive a meaningful message, improving the overall user experience.

NEW QUESTION # 53
Which attribute is related to moving the mouse pointer of an element?

A. Onmouseover
B. Onmouseout
C. Onmouseup
D. onmouseenter

Answer: A

Explanation:
Theonmouseoverattribute in HTML and JavaScript is used to execute a script when the mouse pointer is moved over an element.
* onmouseoverAttribute: 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:
<p onmouseover="this.style.color='red'">Hover over this text to change its color to red.</p> In this example, the text color changes to red when the mouse pointer is moved over the paragraph.
:
MDN Web Docs ononmouseover
W3C HTML Specification on Events

NEW QUESTION # 54
A web designer creates the following HTML code:

Which CSS selector applies only to the first line?

A. .header
B. #Header
C. .Welcome
D. #Welcome

Answer: D

Explanation:
To apply CSS only to the first line of a particular HTML element, the ID selector#Welcomeshould be used as per the given HTML structure.
* CSS ID Selector: The ID selector is used to style the element with a specific id.
* Usage Example:
#Welcome {
color: red;
}
In this example, the#Welcomeselector will apply the red color style only to the element withid="Welcome".
:
MDN Web Docs on ID Selectors
W3C CSS Specification on Selectors

NEW QUESTION # 55
Which attribute is related to moving the mouse pointer of an element?

A. Onmouseover
B. Onmouseout
C. Onmouseup
D. onmouseenter

Answer: A

Explanation:
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:
<p onmouseover="this.style.color='red'">Hover over this text to change its color to red.</p> 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

NEW QUESTION # 56
......

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Jim Fox Jim Fox

Biography

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