WGU Web-Development-Applications Exam Actual Tests | Answers Web-Development-Applications Real Questions

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WGU Web Development Applications Sample Questions (Q21-Q26):

NEW QUESTION # 21
Which code segment correctly defines a function in JavaScript?

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

Answer: A

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 # 22
What should a developer correct before revalidating after a code validator reports multiple errors in code?

A. Only CSS errors
B. Only JavaScript errors
C. The first reported error
D. The last reported error

Answer: C

Explanation:
When using a code validator to check your HTML, CSS, or JavaScript code, it's essential to address errors in a systematic manner. The correct approach is to correct the first reported error before revalidating. This method is recommended because often, the first error can cause a cascade of subsequent errors or warnings.
By fixing the first error, you may automatically resolve other errors that were reported later.
* Reasoning:
* Cascading Errors: The first error in the code might lead to multiple subsequent errors. Fixing it can sometimes resolve those cascading errors, reducing the overall number of errors in the next validation.
* Logical Flow: Addressing errors in the order they appear maintains a logical flow and makes debugging more manageable.
* Steps to Follow:
* Step 1: Run the code through the validator.
* Step 2: Identify the first reported error.
* Step 3: Correct the first error.
* Step 4: Revalidate the code to check if the error count has reduced or if new errors appear.
* Step 5: Repeat the process until all errors are resolved.
* References:
* W3C Markup Validation Service
* MDN Web Docs - Debugging HTML
* W3C CSS Validation Service

NEW QUESTION # 23
Which tag is required when importing the jQuery library?

A. Body
B. Section
C. meta
D. Script

Answer: D

Explanation:
The <script> tag is required when importing the jQuery library into an HTML document.
* Including jQuery:
* Purpose: The <script> tag is used to embed or reference executable code (JavaScript).
* Example:
<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
* Explanation:
* The <script> tag should be placed in the <head> or at the end of the <body> to ensure that the library is loaded before the scripts that depend on it.
* References:
* jQuery Getting Started
* MDN Web Docs - <script>

NEW QUESTION # 24
What should be used to request and Update data in the background?

A. DOM
B. Canvas
C. API
D. AJAX

Answer: D

Explanation:
AJAX (Asynchronous JavaScript and XML) is used to request and update data in the background without reloading the web page.
* AJAX Overview:
* Purpose: Allows web pages to be updated asynchronously by exchanging data with a web server behind the scenes.
* Benefits: Provides a smoother user experience by avoiding full page reloads.
* Example:
* Using XMLHttpRequest:
var xhr = new XMLHttpRequest();
xhr.open("GET", "data.json", true);
xhr.onreadystatechange = function() {
if (xhr.readyState === 4 && xhr.status === 200) {
var data = JSON.parse(xhr.responseText);
console.log(data);
}
};
xhr.send();
* References:
* MDN Web Docs - AJAX
* W3Schools - AJAX Introduction

NEW QUESTION # 25
Which code segment creates a slider field that accepts a numeric value ranging from 1 through 10?

Answer: A

Explanation:
To create a slider field that accepts a numeric value ranging from 1 through 10, the input element with type=" range" should be used. The min and max attributes define the range of acceptable values.
* HTML Input Type range:
* Purpose: The range type is used for input fields that should contain a value from a specified range.
* Attributes:
* type="range": Specifies that the input field should be a slider.
* min="1": Sets the minimum acceptable value.
* max="10": Sets the maximum acceptable value.
* Example:
* Given the HTML:
<input type="range" name="sat-level" min="1" max="10">
* Options Analysis:
* Option A:
<input type="number" name="sat-level" max="10">
* This creates a numeric input field, not a slider.
* Option B:
<input type="range" name="sat-level" min="1" max="10">
* This is the correct option that creates a slider field with the specified range.
* Option C:
<input type="number" name="sat-level" min="1" max="10">
* This creates a numeric input field, not a slider.
* Option D:
<input type="range" name="sat-level" max="10">
* This creates a slider but lacks the min attribute, so it doesn't fully meet the requirement.
* References:
* MDN Web Docs - <input type="range">
* W3Schools - HTML Input Range
By using the correct attributes, the slider field will allow users to select a value between 1 and 10.

NEW QUESTION # 26
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WGU WEB-DEVELOPMENT-APPLICATIONS EXAM ACTUAL TESTS | ANSWERS WEB-DEVELOPMENT-APPLICATIONS REAL QUESTIONS

WGU Web-Development-Applications Exam Actual Tests | Answers Web-Development-Applications Real Questions