Podcast
Questions and Answers
Which HTML element is used to contain text and other HTML elements without intrinsic presentation or semantic value?
Which HTML element is used to contain text and other HTML elements without intrinsic presentation or semantic value?
What is the purpose of the element in HTML5?
What is the purpose of the element in HTML5?
What type of link provides instructions to the browser to start the user’s email program?
What type of link provides instructions to the browser to start the user’s email program?
What is the key objective of CSS?
What is the key objective of CSS?
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Where can CSS styles be located within an HTML document?
Where can CSS styles be located within an HTML document?
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Which attribute provides more information about an HTML element?
Which attribute provides more information about an HTML element?
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What is the primary objective of CSS?
What is the primary objective of CSS?
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Where can CSS styles be located within an HTML document?
Where can CSS styles be located within an HTML document?
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What is the purpose of the overflow property in CSS?
What is the purpose of the overflow property in CSS?
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What type of selector targets elements based on their specific IDs?
What type of selector targets elements based on their specific IDs?
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What is the advantage of using the border-collapse property in tables?
What is the advantage of using the border-collapse property in tables?
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What is the primary purpose of using CSS variables?
What is the primary purpose of using CSS variables?
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What is the primary purpose of the try...catch block in JavaScript?
What is the primary purpose of the try...catch block in JavaScript?
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What is the role of the parseInt() function in JavaScript?
What is the role of the parseInt() function in JavaScript?
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Which JavaScript method is used to display content directly to the HTML document as markup?
Which JavaScript method is used to display content directly to the HTML document as markup?
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What is the main purpose of the confirm() function in JavaScript?
What is the main purpose of the confirm() function in JavaScript?
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What type of variable can be used to store sequences of characters in JavaScript?
What type of variable can be used to store sequences of characters in JavaScript?
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Which JavaScript statement is used to display content in a browser-controlled pop-up window?
Which JavaScript statement is used to display content in a browser-controlled pop-up window?
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What is the highest-level scope in JavaScript that is accessible throughout the entire program?
What is the highest-level scope in JavaScript that is accessible throughout the entire program?
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What is the primary purpose of function constructors in JavaScript?
What is the primary purpose of function constructors in JavaScript?
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What is true about closures in JavaScript?
What is true about closures in JavaScript?
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What is the scope of a variable declared using the var keyword in JavaScript?
What is the scope of a variable declared using the var keyword in JavaScript?
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What is the purpose of the JSON.stringify() method in JavaScript?
What is the purpose of the JSON.stringify() method in JavaScript?
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Which keyword is used to create an instance of an object in JavaScript?
Which keyword is used to create an instance of an object in JavaScript?
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What is a function that is executed later, after being passed as an argument to another function?
What is a function that is executed later, after being passed as an argument to another function?
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Which JavaScript construct can help avoid the issue of the 'this' keyword's context changing in callback functions?
Which JavaScript construct can help avoid the issue of the 'this' keyword's context changing in callback functions?
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What does the term 'lexical scope' refer to in JavaScript?
What does the term 'lexical scope' refer to in JavaScript?
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What is the primary purpose of the closure concept in JavaScript?
What is the primary purpose of the closure concept in JavaScript?
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Which keyword is used to create instances of objects using a function constructor in JavaScript?
Which keyword is used to create instances of objects using a function constructor in JavaScript?
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What does the JavaScript Array object's push() method do?
What does the JavaScript Array object's push() method do?
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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.