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

NEW QUESTION # 18
Which programming paradigm best describes JavaScript?

A. Object-based
B. Event-driven
C. Object-oriented
D. Function-driven

Answer: A

Explanation:
JavaScript is often described as an object-based language, meaning it is centered around objects. While it supports object-oriented programming (OOP) concepts, it is more accurate to describe it as object-based due to its prototypal inheritance model rather than classical inheritance.
* Object-Based: JavaScript is built around objects and supports the creation and manipulation of objects.
* Object-Oriented Features: JavaScript supports OOP principles like encapsulation, inheritance, and polymorphism, but through prototype chains rather than class-based inheritance.
* Functional and Event-Driven: JavaScript supports functional programming and is often used in an event-driven manner, particularly in the context of web browsers.
References:
* MDN Web Docs on JavaScript Object Model
* W3C JavaScript Overview

NEW QUESTION # 19
What is the used to render images dynamically?

A. Canvas
B. MPEG-4
C. H.264
D. Ogg

Answer: A

Explanation:
The <canvas> element in HTML5 is used to render images and graphics dynamically through JavaScript. It is a powerful feature for creating graphics, game visuals, data visualizations, and other graphical content directly in the browser.
* Canvas Element: The <canvas> element is an HTML tag that, with the help of JavaScript, can be used to draw and manipulate graphics on the fly.
* Usage Example:
<canvas id="myCanvas" width="200" height="100"></canvas>
<script>
var canvas = document.getElementById("myCanvas");
var ctx = canvas.getContext("2d");
ctx.fillStyle = "#FF0000";
ctx.fillRect(0, 0, 200, 100);
</script>
In this example, a red rectangle is drawn on a canvas element.
References:
* MDN Web Docs on <canvas>
* W3C HTML Canvas 2D Context Specification

NEW QUESTION # 20
What is the process for JavaScript from validation?

A. Form fields are validated as me user inputs data after form data is sent to the server.
B. User input is sent to the server after the form is completed tor validation.
C. Form fields are validated after the form is submitted but before form data is sent to the server
D. User input is sent to the server as fields are completed for validation.

Answer: C

Explanation:
JavaScript form validation typically occurs after the form is submitted but before the form data is sent to the server. This allows the client-side script to check the input data and prevent the form from being submitted if the data is invalid.
* Client-Side Validation:
* Before Form Submission: JavaScript validates the form fields after the user attempts to submit the form.
* Prevent Default Submission: If the validation fails, JavaScript can prevent the form from being submitted and display appropriate error messages.
* Usage Example:
document.getElementById("myForm").addEventListener("submit", function(event) { var isValid = true;
// Perform validation checks
if (!isValid) {
event.preventDefault(); // Prevent form submission
alert("Please correct the errors.");
}
});
This example prevents form submission if the validation fails.
References:
* MDN Web Docs on Form Validation
* W3C HTML Specification on Form Submission

NEW QUESTION # 21
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 # 22
A web designer inserts an image into a web page.
Which CSS attribute should this designer use to ensure that there is one of pixel of space between the line image and the surrounding elements?

A. Margin
B. Padding
C. Content
D. border

Answer: A

Explanation:
To ensure that there is one pixel of space between the image and the surrounding elements, the margin property should be used.
* CSS Margin Property: The margin property is used to create space around elements, outside of any defined borders.
* Usage Example:
img {
margin: 1px;
}
In this example, the margin: 1px; rule sets a margin of 1 pixel around the image, creating the desired space.
References:
* MDN Web Docs on Margin
* W3C CSS Specification on Margin

NEW QUESTION # 23
......

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