Quizes & Games

Javascript Quiz

The test contains 20 questions and it's not official, it's just a nice way to see how much you know, or don't know, about Javascript.

1.

How does a FOR loop start?

for (i <= 5; i++)
for (i = 0; i <= 5; i++)
for i = 1 to 5
for (i = 0; i <= 5)

2.

How do you round the number 7.25, to the nearest integer?

rnd(7.25)
Math.round(7.25)
Math.rnd(7.25)
round(7.25)

3.

What is the correct way to write a JavaScript array?

var colors = "red", "green", "blue"
var colors = (1:"red", 2:"green", 3:"blue")
var colors = ["red", "green", "blue"]
var colors = 1 = ("red"), 2 = ("green"), 3 = ("blue")

4.

The external JavaScript file must contain the <script> tag.

False
True
Neither True nor False
Sometimes

5.

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

alert("Hello World");
msgBox("Hello World");
alertBox("Hello World");
msg("Hello World");

6.

How do you find the number with the highest value of x and y?

top(x, y)
Math.ceil(x, y)
ceil(x, y)
Math.max(x, y)

7.

What is the correct JavaScript syntax to change the content of this html element <p id="demo">This is a demonstration.</p>

document.getElement("p").innerHTML = "Hello World!";
document.getElementByName("p").innerHTML = "Hello World!";
document.getElementById("demo").innerHTML = "Hello World!";
#demo.innerHTML = "Hello World!";

8.

Where is the correct place to insert a JavaScript?

The <body> section
Both the <head> section and the <body> section are correct
Before <html>
The <head> section

9.

How do you create a function in JavaScript?

function myFunction()
function ()
function = myFunction()
function:myFunction()

10.

How to write an IF statement for executing some code if "i" is NOT equal to 5?

if i =! 5 then
if i <> 5
if (i <> 5)
if (i != 5)

11.

How to write an IF statement in JavaScript?

if (i == 5)
if i = 5
if i == 5 then
if i = 5 then

12.

What is the correct syntax for referring to an external script called "xxx.js"?

<script href="xxx.js">
<script link="xxx.js">
<script name="xxx.js">
<script src="xxx.js">

13.

Inside which HTML element do we put the JavaScript?

<js>
<scripting>
<script>
<javascript>

14.

What is the correct JavaScript syntax for opening a new window called "w2" ?

w2 = window.open("http://www.w3schools.com");
w2 = window("http://www.w3schools.com");
w2 = window.new("http://www.w3schools.com");
w2 = open("http://www.w3schools.com");

15.

How do you call a function named "myFunction"?

call myFunction()
call function myFunction()
myFunction
myFunction()

16.

How can you add a comment in a JavaScript?

// This is a comment-->
<!--This is a comment-->
'This is a comment
//This is a comment

17.

How does a WHILE loop start?

while (i <= 10)
while (i is 10)
while (i <= 10; i++)
while i = 1 to 10

18.

How can you detect the client's browser name?

navigator.appName
navigator.browsername
browser.name
client.navName