JavaScript 411

Question 1

JavaScript is

Answer 1

3 languages all web developers must learn

Question 2

The 1st languages to study is

Answer 2

HTML to define the content of web pages

Question 3

The 2nd languages to study is

Answer 3

CSS to specify the layout of web pages

Question 4

The 3rd languages to study is

Answer 4

JavaScript to program the behavior of web pages

Question 5

JavaScript and Java are

Answer 5

completely different languages

Question 6

JavaScript can do what to HTML

Answer 6

Javascript can change:

Content
Attributes
Styles
Elements

Question 7

JavaScript accepts what type of quotes:

Answer 7

both double and single quotes

Question 8

HTML Attributes

Answer 8

Can be changed in Javascript

Question 9

HTML Styles (CSS)

Answer 9

Can be changed in Javascript

Question 10

HTML Elements

Answer 10

Can hidden in Javascript

Question 11

How can you hide HTML elements in Javascript?

Answer 11

by changing the display style

Question 12

How can you hide HTML Styles in Javascript?

Answer 12

variant of changing an HTML attribute

Question 13

How can you show HTML element in Javascript?

Answer 13

by changing the display style

Question 14

The Tag

Answer 14

Code must be inserted between and tags

Question 15

.

Answer 15

Old JavaScript examples may use a type attribute

Question 16

what is a JavaScript Functions?

Answer 16

a block of JavaScript code

Question 17

how can the function be executed?

Answer 17

when “called” for

Question 18

a function can be called

Answer 18

when an event occurs

Question 19

Where can a Script be placed?

Answer 19

A Scripted can be in the , or in the section of an HTML page, or in both

Question 20

Is there a good location for a script can be within a HTML?

Answer 20

Placing scripts at the bottom of the element improves the display speed, because script compilation slows down the display.

Question 21

Is there another place where can Script be placed?

Answer 21

Scripts can also be placed in external files

Question 22

What is the file extension for javascript?

Answer 22

.js

Question 23

True or False

An external script can contain tags?

Answer 23

False

External scripts cannot contain tags

Question 24

What are the advantages for external javascript?

Answer 24

It separates HTML and code
It makes HTML and JavaScript easier to read and maintain
Cached JavaScript files can speed up page loads

Question 25

External References

Answer 25

External scripts can be referenced with a full URL or with a path relative to the current web page