Tappy Tap App Quiz

Which of the following is the best description of a "Button" component in code.org App Lab?

• A visual element that displays text only

• An interactive element that users can click to trigger actions

• A container for grouping other elements

• A tool for drawing shapes

What is the main purpose of the "Design" tab in App Lab?

• To write JavaScript code

• To arrange and customise the user interface elements

• To test the app on different devices

• To debug errors in the code

Which property would you change to alter the background colour of your app's main screen?

• text

• image

• backgroundColour

• fontSize

In App Lab, which event is triggered when a user taps a button?

• onHover

• onClick

• onDrag

• onLoad

What is the correct way to play a sound effect when a button is tapped in App Lab?

• playSound("sound.mp3");

• startSound("sound.mp3");

• sound.play("sound.mp3");

• triggerSound("sound.mp3");

Which of the following is NOT a valid user interface element in App Lab?

• Button

• Label

• Sprite

• Text Input

What does the following code do? ```javascript onEvent("tapButton", "click", function() { playSound("tap.mp3"); }); ```

• Plays a sound when the app loads

• Plays a sound when the button with ID "tapButton" is clicked

• Changes the button's text

• Changes the background colour

Which property would you use to change the text displayed on a button in App Lab?

• value

• text

• label

• content

If you want to increase the size of a button, which property should you adjust?

• fontSize

• width and height

• textAlign

• borderColour

What is the purpose of the "onEvent" function in App Lab?

• To create new screens

• To handle user interactions like clicks or taps

• To change the app's theme

• To import images