What is the purpose of getText("inputId")?

Retrieves user input from a text field

What does the onEvent function do?

Handles user interaction with a UI element

What will happen after this code is run? var name = getText("nameInput"); setText("greetingLabel", "Hello " + name);

It displays a greeting using the user's input

Why is setProperty("image1", "image", "cat.png"); used?

To change the image displayed in an element

What does getNumber("inputBox"); do?

Retrieves a numeric value from the UI

What happens when a variable is declared inside a function?

It can only be used within that function

Which code reads input from a text field and displays it?

var name = getText("myInput"); setText("displayLabel", name);

inputText("myInput", "displayLabel");

setText("displayLabel", getProperty("myInput"));

What is the result of this code? var age = getNumber("ageInput"); setText("outputLabel", age + 5);

Adds 5 to the age and displays it

To change the background color of a screen named "mainScreen", use:

setProperty("mainScreen", "background-color", "blue");

getProperty("mainScreen", "color");

How would you hide an element using code.org JavaScript?

setProperty("elementId", "visible", false);

setProperty("elementId", "hidden", true);

setProperty("elementId", "hidden", "true");

What is the error in this code? onEvent("submitBtn", "click", function() { var age = getNumber("ageInput"); setText("output", age + " years old"); });

Text is being added to a number

setText cannot display variables

Identify the error: var name = getText("nameInput"); onEvent("greetBtn", "click", function() { setText("greetingLabel", "Hi " + name); });

getText should be inside the onEvent

Which is a better way to combine a number and string?

setText("label", 10 + " points");

setText("label", "points" + 10);

Which of these code blocks is easiest to maintain?

Using same name for all elements

Which is the correct syntax for an onEvent click function?

onEvent("button", "click", function() {});

onClick("button", function() {});

event("button", "click", function);

on("click", "button", function() {});

Which line sets the background color of a button to red?

setProperty("btn", "background-color", "red");

getProperty("btn", "color", "red");

Which function displays the message "Try again"?

setText("messageLabel", "Try again");

What does setProperty("box", "text-color", "blue"); do?

Changes the color of text inside a box

How would you connect an event to a button that shows a hidden image?

A. onEvent("btn", "click", function() { show("img1"); });

B. onClick("btn", function() { show("img1"); });

C. btn.onclick = function() { show("img1"); };

Which code will change the text color of a label to green?

setProperty("label1", "text-color", "green");

setTextColor("label1", "green");

Which line of code sets a button's text to "Submit"?

setText("submitBtn", "Submit");

getText("submitBtn", "Submit");

buttonText("submitBtn", "Submit");

What happens in the following code? onEvent("btnSend", "click", function() { var msg = getText("messageInput"); setText("outputLabel", msg); });

It displays user input from a text field in a label

It stores a message permanently

It sends a message to another app

Which code sets a dropdown's selected item to "High"?

setProperty("dropdown1", "value", "High");

Which code shows how to respond to a user clicking a button named "submitBtn"?

onEvent("submitBtn", "click", function() { });

submitBtn.on("click", function() {})

submitBtn.addEvent("click", function() {});

onClick("submitBtn", function() {});

How can you use input from a text field to customize a greeting message? onEvent("greetBtn", "click", function() { var name = getText("nameInput"); setText("greetingLabel", "Hello " + name); });

It displays a greeting using input

It sets a variable to the label name

Which statement correctly changes the font size of a label?

setProperty("label1", "font-size", "20px");

setText("label1", "font-size", "20px");

label1.style.fontSize = "20px";

setStyle("label1", "font-size", "20px");

What is the purpose of using onEvent in an app?

To detect and respond to user actions

JavaScript Basics Quiz

Authored by Lamia Saieed

Computers

10th Grade

Used 27+ times

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69 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What keyword is used to create a variable in JavaScript?

define

let

var

make

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which code correctly assigns the value 5 to the variable score?

score = let 5;

var score = 5;

set score = 5;

score <- 5;

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which block allows a user to type input in a Design tab element?

label

dropdown

text input

button

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the correct syntax to declare a variable in JavaScript?

create variable x = 5;

int x = 5;

var x = 5;

x := 5;

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which keyword is used to store a number or string in JavaScript?

define

function

var

input

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the function of setText(id, text)?

Stores text in a variable

Gets text from the screen

Sets text of a UI element

Deletes a text input

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which event type is used to detect a button click in onEvent()?

hover

input

submit

click

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JavaScript Basics Quiz

What keyword is used to create a variable in JavaScript?

Which code correctly assigns the value 5 to the variable score?

Which block allows a user to type input in a Design tab element?

What is the correct syntax to declare a variable in JavaScript?

Which keyword is used to store a number or string in JavaScript?

What is the function of setText(id, text)?

Which event type is used to detect a button click in onEvent()?

What is the purpose of getText("inputId")?

What does the onEvent function do?

In the line setText("messageLabel", "Hello!");what does "messageLabel" refer to?

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In the line
setText("messageLabel", "Hello!");
what does "messageLabel" refer to?