JavaScript Quiz

1.

1 point

How can you add a comment in a JavaScript?

//This is a comment

'This is a comment

2.

1 point

How to insert a comment that has more than one line?

//This comment has
more than one line//

/*This comment has
more than one line*/

3.

1 point

What is the correct JavaScript syntax to change the content of the HTML element below?

<p id="demo">This is a demonstration.</p>

#demo.innerHTML = "Hello World!";

document.getElementByName("p").innerHTML = "Hello World!";

document.getElementById("demo").innerHTML = "Hello World!";

document.getElement("p").innerHTML = "Hello World!";

4.

1 point

How to write an IF statement in JavaScript?

if i = 5 then

if i == 5 then

if i = 5

if (i == 5)

5.

1 point

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

rnd(7.25)

round(7.25)

Math.round(7.25)

Math.rnd(7.25)

6.

1 point

How do you create a function in JavaScript?

function:myFunction()

function myFunction()

function = myFunction()

7.

1 point

How can you detect the client's browser name?

client.navName

browser.name

navigator.appName

8.

1 point

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

True

False

9.

1 point

How do you call a function named "myFunction"?

call myFunction()

myFunction()

call function myFunction()

10.

1 point

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

msg("Hello World");

msgBox("Hello World");

alert("Hello World");

alertBox("Hello World");

11.

1 point

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

if i <> 5

if i =! 5 then

if (i <> 5)

if (i != 5)

12.

1 point

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

13.

1 point

Where is the correct place to insert a JavaScript?

The <head> section

The <body>

Both the <head> section and the <body> section are correct

14.

1 point

How does a FOR loop start?

for (i <= 5; i++)

for i = 1 to 5

for (i = 0; i <= 5)

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

15.

1 point

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

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

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

16.

1 point

Inside which HTML element do we put the JavaScript?

<js>

17.

1 point

What is the correct way to write a JavaScript array?

var colors = ["red", "green", "blue"]

var colors = "red", "green", "blue"

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

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

18.

1 point

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

ceil(x, y)

top(x, y)

Math.max(x, y)

Math.ceil(x, y)

19.

1 point

JavaScript is the same as Java.

False

True

20.

1 point

How does a WHILE loop start?

while i = 1 to 10

while (i <= 10)

while (i <= 10; i++)