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WGU Web Development Applications Sample Questions (Q18-Q23):

NEW QUESTION # 18
Given the following CSS code:

Which type of selector is used?

A. Group
B. Class
C. Element
D. ID

Answer: D

Explanation:
The given CSS code uses the #name selector, which is an ID selector. The ID selector is used to style an element with a specific id attribute.
* ID Selector: In CSS, the ID selector is used to style the element with the specific id. The syntax for the ID selector is #id, where id is the id attribute value of the HTML element.
* Usage Example:
#name {
text-align: left;
}
This CSS rule will apply the text-align: left; style to the element with id="name".
* ID Selector Characteristics:
* An ID must be unique within a document, meaning it can be used only once per page.
* ID selectors are more specific than class selectors and element selectors.
* Example in HTML:
<div id="name">This is a div with ID "name".</div>
References:
* MDN Web Docs on CSS Selectors
* W3C CSS Specification on Selectors

NEW QUESTION # 19
Which code segment correctly defines a function in JavaScript?

A. Void addNumbers(a, b)
B. Function addNumber (in a, int b)
C. Function addNumbers (a, b)
D. Void addNumber(int a, int b)

Answer: C

Explanation:
In JavaScript, functions are defined using the function keyword followed by the name of the function, a set of parentheses (), and a block of code enclosed in curly braces {}.
* Function Definition Syntax:
* Correct Syntax:
function addNumbers(a, b) {
// function body
}
* Explanation:
* function: Keyword to define a function.
* addNumbers: Name of the function.
* (a, b): Parameters for the function.
* { ... }: Function body containing the code to be executed.
* Incorrect Options:
* A. Void addNumbers(a, b): JavaScript does not use void to define functions.
* C. Void addNumber(int a, int b): JavaScript does not use void or type declarations (int).
* D. Function addNumber (in a, int b): JavaScript functions do not use type declarations.
* References:
* MDN Web Docs - Functions
* W3Schools - JavaScript Functions

NEW QUESTION # 20
Which technique should a developer use for text-based hyperlink on mobile web page?

A. Using dynamic page elements neat the link
B. Keeping links uniform
C. Padding the clickable area around the link
D. Deploying graphical links

Answer: C

Explanation:
When designing text-based hyperlinks for mobile web pages, it is essential to ensure that the links are easily tappable. Adding padding around the clickable area increases the touch target size, making it easier for users to interact with the link on a mobile device.
* Techniques for Mobile-Friendly Links:
* Padding the Clickable Area: By adding padding, you increase the touchable area around the link, which helps prevent user frustration due to missed taps.
* CSS Example:
a {
padding: 10px;
display: inline-block;
}
* Other Options:
* B. Keeping links uniform: This refers to making all links look the same, which is good for consistency but doesn't specifically address the issue of touch targets.
* C. Deploying graphical links: While graphical links can be effective, they do not necessarily improve touch target size for text-based hyperlinks.
* D. Using dynamic page elements near the link: This can lead to a cluttered interface and does not address the touch target issue directly.
* References:
* MDN Web Docs - Touch targets
* Google Developers - Mobile Web Development

NEW QUESTION # 21
Given the following HTML code:

Which line of code should replace the first line to ensure that users can pause and restart the video?

Answer: B

Explanation:
To ensure that users can pause and restart the video, the controls attribute needs to be added to the <video> tag. This attribute provides the user with controls to play, pause, and adjust the volume of the video. The correct line of code that should replace the first line in the provided HTML to achieve this functionality is:
<video width="360" height="270" controls>
Here's the comprehensive explanation:
* controls Attribute: The controls attribute is a boolean attribute. When present, it specifies that video controls should be displayed, allowing the user to control video playback, including pausing, playing, and seeking.
* HTML Structure:
* Original Line:
<video width="360" height="270">
* Revised Line:
<video width="360" height="270" controls>
* Usage Example:
<video width="360" height="270" controls>
<source src="video.mp4" type="video/mp4">
Your browser does not support the HTML5 video element.
</video>
In this example, adding the controls attribute provides the user with play, pause, and volume controls.
References:
* MDN Web Docs on <video>
* W3C HTML5 Specification on <video>

NEW QUESTION # 22
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: A

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 # 23
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