Let’s test your knowledge by solving Javascript Basics Quiz.

JavaScript Basics

1 / 20

Which method is used to add a new item to the end of an array?

push()

pop()

shift()

2 / 20

How do you change the text of an HTML element with an id of "demo" using JavaScript?

document.getElementById("demo").text = "New Text";

document.getElementById("demo").innertext = "New Text";

document.getElementById("demo").innerHTML = "New Text";

3 / 20

What is the purpose of the console.log() method in JavaScript?

To display messages in a dialog box

To output information to the web page

To print messages to the web console

4 / 20

What event occurs when a user clicks on an HTML element?

onhover

onclick

onchange

5 / 20

How do you create an object in JavaScript?

var obj = new Object();

var obj = {};

Both a and b

6 / 20

What method would you use to access the first element of an array named myArray?

myArray.first()

myArray[0]

myArray.get(0)

7 / 20

Which control structure is used to execute code only if a condition is true?

for loop

while loop

if statement

8 / 20

How do you define a function in JavaScript?

function myFunction() { }

def myFunction() { }

func myFunction() { }

9 / 20

Which operator is used for logical AND in JavaScript?

10 / 20

How do you perform a comparison between two values in JavaScript?

= and ==

11 / 20

What type of data is null in JavaScript?

Number

String

Object

12 / 20

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

var x = 10;

variable x = 10;

declare x = 10;

13 / 20

What is one use of JavaScript in browser developer tools?

Editing HTML

Viewing and modifying JavaScript code

Running server-side scripts

14 / 20

In which environment can JavaScript be run outside of a web browser?

Node.js

Python

Java

15 / 20

Which of the following is an example of a JavaScript framework?

jQuery

Angular

Bootstrap

16 / 20

What is the purpose of JavaScript libraries?

To provide a basic framework for styling

To offer pre-written code to simplify common tasks

To replace JavaScript entirely

17 / 20

Which of the following is a valid way to include external JavaScript in an HTML document?

18 / 20

What method is used to add JavaScript code that is included in the <head> or <body> section of an HTML file?

External JavaScript

Internal JavaScript

Inline JavaScript

19 / 20

How can you include JavaScript directly within an HTML document?

External JavaScript

Internal JavaScript

Inline JavaScript

20 / 20

What is JavaScript primarily used for?

Server-side programming

Styling web pages

Adding interactivity to web pages

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The average score is 66%

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Javascript Basics Quiz

Let’s test your knowledge by solving Javascript Basics Quiz.

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