JavaScript Quiz

2. Which keyword is used to declare a variable in JavaScript?

• let

• const

• var

• All of the above

3. Which of the following is NOT a valid JavaScript data type?

• String

• Boolean

• Number

• Object

4. What is the result of the following code: "5" + 5?

• 10

• "55"

• "10"

• NaN

What does the acronym "JSON" stand for in JavaScript?

• JavaScript Object Notation

• Java Script Output Note

• JavaScript Object Namespace

• Java Script On-The-Go

What does the "NaN" value represent in JavaScript?

• "New and Nice" value

• "Not a Number" value

• "No Available Number" value

• "Never Again" value

Which of the following is a valid way to declare a variable in JavaScript?

• let myVar;

• const myVar;

• myVar;

• var myVar;

Which of the following loop statements will always execute at least once?

• for loop

• while loop

• do-while loop

• All of the above

1. Which keyword is used to define a function in JavaScript?

• Def

• Function

• Create

• Define

Which of the following is NOT a comparison operator in JavaScript?

• <

• >

• =

• ==

Which of the following is NOT a valid way to create an array in JavaScript?

• let myArray = [1, 2, 3];

• let myArray = new Array(1, 2, 3);

• let myArray = 1, 2, 3;

• None of the above