JavaScript Basics Quiz

What is the correct way to declare a JavaScript variable?

• variable x;

• v x;

• var x;

• let = x;

Which of the following is NOT a JavaScript data type?

• String

• Boolean

• Float

• Undefined

How do you write "Hello, World!" in an alert box?

• alert("Hello, World!");

• msgBox("Hello, World!");

• msg("Hello, World!");

• alertBox("Hello, World!");

Which operator is used to assign a value to a variable?

• =

• ==

• ===

• =>

How do you write a single-line comment in JavaScript?

• <!-- This is a comment -->

• // This is a comment

• /* This is a comment */

• ** This is a comment **

What will console.log(typeof []) output?

• array

• object

• list

• undefined

How do you create a function in JavaScript?

• function = myFunction() {}

• function myFunction() {}

• create function myFunction() {}

• def myFunction() {}

Which of the following is the correct way to write an if statement in JavaScript?

• if i == 5 then

• if (i == 5) {}

• if i = 5 {}

• if (i = 5) then {}

What does the === operator do in JavaScript?

• Checks for equality in value only

• Checks for equality in both value and type

• Assigns a value

• Compares only types

What will console.log(3 + "3"); output?

• 6

• 33

• 3 3

• Error