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WGU Web Development Applications Sample Questions (Q25-Q30):

NEW QUESTION # 25
Which code segment correctly defines a function in JavaScript?

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

Answer: B

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 # 26
A web page has a section that contains an <article> element. The element is always 10 pixels to the right of its position.
Which type of layout positioning should the <article> element use?

A. Relative
B. Fixed
C. Static
D. Absolute

Answer: A

Explanation:
Relative positioning in CSS positions an element relative to its normal position. Using position: relative; allows you to adjust the element's position with the top, right, bottom, or left properties.
* CSS Relative Positioning:
* Syntax:
article {
position: relative;
left: 10px;
}
* Description: Moves the element 10 pixels to the right from its normal position.
* Example:
* Given HTML:
<article>Content</article>
* Given CSS:
article {
position: relative;
left: 10px;
}
* Explanation: The <article> element will be positioned 10 pixels to the right of where it would normally appear.
* References:
* MDN Web Docs - position
* W3C CSS Positioned Layout Module Level 3

NEW QUESTION # 27
What allows a scripting language to manipulate elements on a web page?

A. CSS
B. XML
C. DOM
D. HTML

Answer: C

Explanation:
The Document Object Model (DOM) is an API for HTML and XML documents that defines the logical structure of documents and the way a document is accessed and manipulated.
* DOM Explanation:
* The DOM represents the page so that programs can change the document structure, style, and content.
* It provides a way for scripts to update the content, structure, and style of a document while it is being viewed.
* Explanation:
* Option A: CSS is incorrect because it is used for styling web pages.
* Option B: XML is incorrect because it is a markup language, not an API for manipulating web page elements.
* Option C: HTML is incorrect because it is the markup language used to create web pages, not an API for manipulation.
* Option D: DOM is correct because it allows a scripting language to manipulate elements on a web page.
* References:
* MDN Web Docs - DOM
* W3Schools - JavaScript HTML DOM

NEW QUESTION # 28
A javaScript programmer defines the following function:

What is the name of the function?

A. Function
B. square
C. Return
D. Number

Answer: B

Explanation:
In JavaScript, the name of a function is defined after the function keyword and before the parentheses that enclose its parameters.
* Function Name: The function name is the identifier used to call the function. It is defined immediately after the function keyword.
* Usage Example:
function square(number) {
return number * number;
}
In this example, the name of the function is square.
References:
* MDN Web Docs on Functions
* ECMAScript Language Specification

NEW QUESTION # 29
Which programming paradigm best describes JavaScript?

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

Answer: B

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 # 30
......

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