Test Your JavaScript Knowledge

Question 1

1/12

What is JavaScript primarily used for?

Adding interactivity to web pages

Answer

Creating web pages

Answer

Styling web pages

Answer

Building databases

Question 2

2/12

Which symbol is used to denote a single line comment in JavaScript?

//

--

/*

<!--

Answer

Data Object Model

Answer

Design Object Model

Answer

Documentary Object Model

Answer

A function that has a higher scope than other functions

Answer

A function that is executed after all other functions

Answer

A function that takes a higher number of parameters

Answer

var obj = Object.new();

Answer

var obj = create Object();

Answer

var obj = Object.create();

Answer

Server-side

Answer

Operating system

Answer

The current user

Answer

The previous element

Answer

The parent element

Question 3

3/12

What does DOM stand for in JavaScript?

Document Object Model

Question 4

4/12

Which operator is used for strict equality comparison in JavaScript?

=

==

===

!=

Question 5

5/12

What method is used to remove the last element from an array in JavaScript?

pop()

push()

shift()

unshift()

Question 6

6/12

Which of the following is not a JavaScript data type?

Number

Boolean

Float

String

Question 7

7/12

What function is used to print content to the console in JavaScript?

print()

alert()

console.log()

write()

Question 8

8/12

What is a higher-order function in JavaScript?

A function that takes another function as an argument

Question 9

9/12

Which built-in method returns the length of a string in JavaScript?

size()

length()

count()

length

Question 10

10/12

How can you create a new object in JavaScript?

var obj = new Object();

Question 11

11/12

Where does JavaScript code typically run?

Client-side

Database

Question 12

12/12

What does the 'this' keyword refer to in JavaScript?

The current object