JS Snippet Quiz

What is JavaScript used for?

• Styling web pages

• Making web pages interactive

• Creating web page layouts

• Defining web page structure

How can you add JavaScript to an HTML file?

• <script>

• <js>

• <javascript>

• <code>

Which keyword is used to declare changing variables in JavaScript?

• variable

• int

• var

• char

What does the innerHTML property do in JavaScript?

• Changes the content of an element

• Changes the style of an element

• Removes an element from the DOM

• Adds a new element to the DOM

How do you select an element by its ID in JavaScript?

• document.getElementByClassName()

• document.getElementByName()

• document.getElementById()

• document.querySelector()

Which method is used to add an event listener in JavaScript?

• addEventListener()

• attachEvent()

• onEvent()

• addListenEvent()

What does event.preventDefault() do?

• Stops the event from bubbling up the DOM tree

• Prevents the default behavior of the event

• Removes the event listener from the element

• Stops the propagation of the event to other elements

What would be the output in this code segment?

const x = 5;

x = 4;

console.log(x);

• error

• const

• 4

• 5