JavaScript Basics Quiz

What does console.log do?

• Runs a function

• Outputs text or values to the console screen

• Changes a variable

• Starts a loop

Which line correctly declares a variable called score with a value of 10?

• var score = 10;

• var score 10;

• let = 10 score;

• score var = 10;

What is the purpose of getNumber("inputBox") in Code.org?

• Sets a number in an input box

• Retrieves a number from a user’s input box

• Creates a new input box

• Adds a number to a variable

Given the function below, what will be the output if you call greet("Alice")?

function greet(name) {

return "Hello, " + name + "!"; }

• "Hello, Alice!"

• "Hello, name!"

• "Hello, !"

• "Alice"

What will this code display?

var x = 5;

console.log(x * 2);

• 2

• 5

• 10

• "x * 2"

What does if (score > 10) check for?

• If score is less than 10

• If score is equal to 10

• If score is more than 10

• If score is 10

Which line correctly assigns a value to a variable named age?

• age = 15;

• var age;

• let age: 15;

• age 15;

What will this code do? function checkWeather(weather) {

if (weather === "rainy") {

console.log("Bring an umbrella!");

} else {

console.log("No umbrella needed!");

}

}

• It checks if the weather is rainy and logs "Bring an umbrella!"

• It always logs "No umbrella needed!"

• It logs "rainy" to the console

• Does nothing

What does the following code output?

var value = 11;

if (value === 10) {

console.log("Equal"); } else {

console.log("Not equal"); }

• Equal

• Not equal

• "10"

• Undefined

What does else mean in an if-else statement?

• Run this if the if is true

• Run this if the if is false

• Always run this

• None of these