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HTML Elements for Accessibility and Web Development
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HTML Elements for Accessibility and Web Development

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Questions and Answers

Which HTML element is used to contain text and other HTML elements without intrinsic presentation or semantic value?

  • (correct)

    • What is the purpose of the element in HTML5?

  • Provide semantic relations (correct)
  • Enclose contact information
  • Display images only
  • Indicate quotations

    • What type of link provides instructions to the browser to start the user’s email program?

  • Hyperlinks to external sites
  • Relative URLs
  • Links to other pages or resources within the site
  • Email links (correct)

    • What is the key objective of CSS?

    <p>To describe the appearance of HTML elements</p> Signup and view all the answers

    Where can CSS styles be located within an HTML document?

    <p>Anywhere in the document</p> Signup and view all the answers

    Which attribute provides more information about an HTML element?

    <p>Attribute</p> Signup and view all the answers

    What is the primary objective of CSS?

    <p>To control the layout of the HTML elements</p> Signup and view all the answers

    Where can CSS styles be located within an HTML document?

    <p>Anywhere within the HTML document</p> Signup and view all the answers

    What is the purpose of the overflow property in CSS?

    <p>To control what happens when the content of a box is too large to fit</p> Signup and view all the answers

    What type of selector targets elements based on their specific IDs?

    <p>ID selectors</p> Signup and view all the answers

    What is the advantage of using the border-collapse property in tables?

    <p>It shares a single border between adjacent cells</p> Signup and view all the answers

    What is the primary purpose of using CSS variables?

    <p>To define colors without using a preprocessor</p> Signup and view all the answers

    What is the primary purpose of the try...catch block in JavaScript?

    <p>Handle exceptions and errors</p> Signup and view all the answers

    What is the role of the parseInt() function in JavaScript?

    <p>To convert a string to an integer</p> Signup and view all the answers

    Which JavaScript method is used to display content directly to the HTML document as markup?

    <p>document.write()</p> Signup and view all the answers

    What is the main purpose of the confirm() function in JavaScript?

    <p>To display a question in a modal window with 'ok' and 'cancel' buttons</p> Signup and view all the answers

    What type of variable can be used to store sequences of characters in JavaScript?

    <p>String</p> Signup and view all the answers

    Which JavaScript statement is used to display content in a browser-controlled pop-up window?

    <p>alert()</p> Signup and view all the answers

    What is the highest-level scope in JavaScript that is accessible throughout the entire program?

    <p>The global scope</p> Signup and view all the answers

    What is the primary purpose of function constructors in JavaScript?

    <p>To create instances of objects</p> Signup and view all the answers

    What is true about closures in JavaScript?

    <p>Closures have access to their parent function's variables</p> Signup and view all the answers

    What is the scope of a variable declared using the var keyword in JavaScript?

    <p>Function or global scope, depending on where it is declared</p> Signup and view all the answers

    What is the purpose of the JSON.stringify() method in JavaScript?

    <p>To convert JavaScript objects to JSON strings</p> Signup and view all the answers

    Which keyword is used to create an instance of an object in JavaScript?

    <p>new</p> Signup and view all the answers

    What is a function that is executed later, after being passed as an argument to another function?

    <p>A callback function</p> Signup and view all the answers

    Which JavaScript construct can help avoid the issue of the 'this' keyword's context changing in callback functions?

    <p>Arrow functions</p> Signup and view all the answers

    What does the term 'lexical scope' refer to in JavaScript?

    <p>The scope determined by the placement of variables and functions in the source code</p> Signup and view all the answers

    What is the primary purpose of the closure concept in JavaScript?

    <p>To create a link between a function and its scope environment</p> Signup and view all the answers

    Which keyword is used to create instances of objects using a function constructor in JavaScript?

    <p>new</p> Signup and view all the answers

    What does the JavaScript Array object's push() method do?

    <p>Adds one or more elements to the end of an array and returns the new length</p> Signup and view all the answers

    Study Notes

    JavaScript Fundamentals

    • In JavaScript, a for...of loop is used to iterate over sequences of characters.
    • A String is a type of variable that can be used to store sequences of characters.

    Error Handling and Debugging

    • A try...catch block is used to handle exceptions and errors in JavaScript.
    • The parseInt() function is used to convert a string to an integer.

    JavaScript Functions and Constructors

    • The primary role of the confirm() function is to display a question in a modal window with "ok" and "cancel" buttons.
    • The document.write() method outputs content directly to the HTML document as markup.
    • A function constructor is used to create instances of objects, and is created using the new keyword.

    Variable Scope and Closures

    • A variable declared using the var keyword has a scope that depends on where it is declared.
    • A closure has access to its parent function's variables even after the parent function has finished executing.
    • The primary purpose of a closure is to create a link between a function and its scope environment, allowing the function to access variables from its enclosing scope.

    JavaScript Statements and Operators

    • The alert() function is used to display content in a browser-controlled pop-up window.
    • The parseInt() function is used to convert a string to an integer.

    Object-Oriented Programming

    • A constructor is a function that is used to create instances of objects.
    • The new keyword is used to create instances of objects using a function constructor.

    HTML and CSS Fundamentals

    • The <div> element is used to contain text and other HTML elements without intrinsic presentation or semantic value.
    • The `` element is used to display an image by specifying a filename or URL.
    • The figcaption element is used to provide a caption for an image.

    CSS Selectors and Properties

    • CSS styles can be located anywhere within an HTML document.
    • A CSS rule consists of a selector and a declaration block.
    • Inline styles in CSS are used to apply a style to only the defined element.
    • ID selectors target elements based on their specific IDs.
    • Pseudo-class selectors target elements based on a specific state or relationship.
    • Specificity in CSS is defined as the more specific selector taking precedence.
    • The overflow property is used to control what happens when the content of a box is too large to fit.

    Tables in HTML

    • The `` element is primarily used to create tables in HTML.
    • The border-collapse property is used to share a single border between adjacent cells in a table.

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    Test your knowledge of HTML elements and their uses in web development, with a focus on accessibility features. Identify the correct elements for containing text, displaying images, and creating links.

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