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NEW QUESTION # 39
Given the following code:
What does the console display as output?
Answer: C
Explanation:
Given the code segment:
var a = "8";
var b = "6";
var c = a + b;
console.log(c);
This code concatenates two strings.
* Explanation:
* var a = "8";: Variable a is assigned the string "8".
* var b = "6";: Variable b is assigned the string "6".
* var c = a + b;: The + operator concatenates the two strings, resulting in "86".
* console.log(c);: Outputs the value of c to the console.
* Output:
* The console displays "86" because it concatenates the two string values.
* References:
* MDN Web Docs - String
* W3Schools - JavaScript String
NEW QUESTION # 40
Which element attaches an external CSS document to a web page?
Answer: C
Explanation:
To attach an external CSS document to a web page, the <link> element is used within the <head> section of the HTML document.
* <link> Element:
* Purpose: Links external resources, such as stylesheets, to the HTML document.
* Attributes:
* rel="stylesheet": Specifies the relationship between the current document and the linked resource.
* href="path/to/stylesheet.css": Specifies the URL of the external stylesheet.
* Example:
<head>
<link rel="stylesheet" href="styles.css">
</head>
* Other Options:
* <style>: Used to embed internal CSS directly within the HTML document, not for linking external CSS.
* <script>: Used to embed or link to JavaScript files.
* <meta>: Provides metadata about the HTML document, not for linking stylesheets.
* References:
* W3C HTML5 Specification - The link element
* MDN Web Docs - <link>
By using the <link> element correctly, you can ensure that your web page is styled with external CSS, maintaining a separation of concerns and making your HTML more manageable.
NEW QUESTION # 41
Which feature was introduced in HTML5?
Answer: A
Explanation:
HTML5 introduced several new features that enhanced web development capabilities significantly. One of the notable features is the native drag-and-drop capability.
* Native Drag-and-Drop Capability:
* Description: HTML5 allows developers to create drag-and-drop interfaces natively using the draggable attribute and the DragEvent interface. This means elements can be dragged and dropped within a web page without requiring external JavaScript libraries.
* Implementation:
* Making an Element Draggable: To make an element draggable, you set the draggable attribute to true:
<div id="drag1" draggable="true">Drag me!</div>
* Handling Drag Events: You use event listeners for drag events such as dragstart, dragover, and drop:
document.getElementById("drag1").addEventListener("dragstart", function(event) { event.dataTransfer.setData("text", event.target.id);
});
document.getElementById("dropzone").addEventListener("dragover", function(event) { event.preventDefault();
});
document.getElementById("dropzone").addEventListener("drop", function(event) { event.preventDefault(); var data = event.dataTransfer.getData("text"); event.target.appendChild(document.getElementById(data));
});
* Example: This example demonstrates a simple drag-and-drop operation:
html
Copy code
<div id="drag1" draggable="true">Drag me!</div>
<div id="dropzone" style="width: 200px; height: 200px; border: 1px solid black;">Drop here</div>
* References:
* W3C HTML5 Specification - Drag and Drop
* MDN Web Docs - HTML Drag and Drop API
* HTML5 Doctor - Drag and Drop
HTML5's native drag-and-drop feature streamlines the process of creating interactive web applications by eliminating the need for third-party libraries, thus making it a powerful addition to the HTML standard.
NEW QUESTION # 42
A web page has the following CSS code:
Which selector should a developer use to invoke the CSS?
Answer: B
Explanation:
To invoke the CSS provided, an ID selector is used. In CSS, the ID selector is used to style the element with the specific id attribute.
* CSS ID Selector: The syntax for the ID selector is #id, where id is the id attribute value of the HTML element.
* Usage Example:
#black {
color: black;
}
This CSS rule will apply the color: black; style to the element with id="black".
* Example in HTML:
<div id="black">This text will be black.</div>
References:
* MDN Web Docs on ID Selectors
* W3C CSS Specification on Selectors
NEW QUESTION # 43
Which framework assists designers with adaptive page layout?
Answer: A
Explanation:
Bootstrap is a popular front-end framework that assists designers in creating adaptive and responsive page layouts easily.
* Bootstrap:
* Responsive Design: Bootstrap provides a responsive grid system, pre-styled components, and utilities that help in designing adaptive layouts.
* Example:
<div class="container">
<div class="row">
<div class="col-sm-4">Column 1</div>
<div class="col-sm-4">Column 2</div>
<div class="col-sm-4">Column 3</div>
</div>
</div>
* Other Options:
* A. Modernize: Not a framework, but a JavaScript library to detect HTML5 and CSS3 features.
* C. React: A JavaScript library for building user interfaces, not specifically for layout.
* D. Knockout: A JavaScript library for implementing MVVM pattern, not specifically for layout.
* References:
* Bootstrap Documentation
* MDN Web Docs - Responsive design
These answers ensure accurate and comprehensive explanations for the given questions, supporting efficient learning and understanding.
NEW QUESTION # 44
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