Event-Driven Programming Quiz

What is the main concept of event-driven programming?

• Writing programs that run in a loop

• Writing programs driven by user events

• Writing programs that execute in sequence

• Writing programs that do not require user input

What does the getElementById method do?

• It retrieves a DOM element by its class name

• It retrieves a DOM element by its ID

• It retrieves all DOM elements on a page

• It retrieves a DOM element by its tag name

What should you omit when providing an ID in getElementById?

• The dot (.) used in CSS selectors

• The hash (#) used in CSS selectors

• The quotes around the ID

• The space between words

Which method allows you to select an element using any valid CSS selector?

• document.getElementById

• document.querySelector

• document.getElementsByClassName

• document.querySelectorAll

What does querySelectorAll return?

• A single DOM element

• A NodeList of elements

• An array of strings

• A boolean value

When are DOM elements accessible?

• When the page is loaded

• When the script is executed

• When the user clicks on them

• When the browser is closed

What is an event handler?

• A function that creates events

• A function that executes immediately

• A function that listens for events

• A function that stops events

What are callback functions?

• Functions that are executed immediately

• Functions that are passed as arguments to other functions

• Functions that cannot be reused

• Functions that only handle synchronous tasks

Which event occurs when a webpage has finished loading?

• load

• click

• scroll

• dblclick

What does the keydown event signify?

• A webpage is loaded

• A mouse button is clicked

• A key is pressed

• A key is released