最新的Web-Development-Applications試題和資格考試中的領先提供商和最近更新的最新Web-Development-Applications試題

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>> Web-Development-Applications試題 <<

最新的 Courses and Certificates Web-Development-Applications 免費考試真題 (Q39-Q44):

問題 #39
What allows a scripting language to manipulate elements on a web page?

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

答案：A

解題說明：
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

問題 #40
Which layout design is easiest to manage on a variety of devices?

A. Table
B. Grid
C. Flow
D. Border

答案：B

解題說明：
A grid layout is easiest to manage across a variety of devices due to its flexibility and ability to create responsive designs that adapt to different screen sizes.
* Grid Layout:
* Responsive Design: Grid layouts can be easily adjusted using media queries to provide a consistent user experience across devices.
* CSS Grid Example:
container {
display: grid;
grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
}
* Other Options:
* A. Flow: Often used for text, not layout.
* B. Table: Outdated and not responsive.
* D. Border: Not commonly used for complex layouts.
* References:
* MDN Web Docs - CSS Grid Layout
* W3Schools - CSS Grid Layout

問題 #41
What is the default behavior of overlay elements?

A. Last element listed appears on top
B. Last element listed appears on bottom
C. First element listed is invisible
D. First element listed is transparent

答案：A

解題說明：
In CSS, when elements overlap, the default behavior is that the last element listed in the HTML document appears on top.
* Stacking Context:
* Default Behavior: Elements are stacked in the order they appear in the HTML. The last element in the document tree is rendered on top.
* z-index: You can control stacking order using the z-index property, but without it, the default order applies.
* Example:
* Given HTML:
<div style="position: absolute; width: 100px; height: 100px; background-color: red;"></div>
<div style="position: absolute; width: 100px; height: 100px; background-color: blue;"></div>
* The blue div will be on top of the red div because it appears later in the HTML document.
* References:
* MDN Web Docs - Stacking context
* W3C CSS Positioned Layout Module Level 3
By understanding these fundamental CSS concepts, developers can create more effective and visually appealing web layouts.

問題 #42
Given the following CSS code:

Which type of selector is used?

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

答案：A

解題說明：
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

問題 #43
Given the following HTML code:

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

答案：C

解題說明：
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>

問題 #44
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