Class 05

Question 1

Scripting language which is used to enhance the

functionality and appearance of web pages.

Answer 1

Javascript

Question 2

indicates to the browser that the following text is a part of a script

Answer 2

script tag

Question 3

write into an HTML document

Answer 3

innerHTML

Question 4

write into HTML output box

Answer 4

document.write()

Question 5

write into an alert box

Answer 5

window.alert()

Question 6

write into the browsers console

Answer 6

console.log()

Question 7

Gives you the ability to generate part or all of a web page’s content at the time it is shown to the user

Answer 7

Scripting

Question 8

Used to declare the names of variables

Answer 8

var

Question 9

A single-line comment begins with the characters

Answer 9

//

Question 10

Multiline comments begin with delimiter

Answer 10

/* hello
world
!!!
*/

Question 11

• A variable is assigned a value with an …

Answer 11

assignment operator (=)

Question 12

Signifies that a variable has no value

Answer 12

null keyword

Question 13

converts its string argument to an integer

Answer 13

parseInt

Question 14

error that occurs at execution time.

Answer 14

logical error

Question 15

an error that causes a script to fail and terminate prematurely.

Answer 15

fatal logical error

Question 16

an error that allows a script to continue executing, but the script produces incorrect results

Answer 16

nonfatal logical error

Question 17

skips the remaining statements in the body of the statement and proceeds with the next iteration of the loop
• In while and do…while statements, the loop-continuation test evaluates immediately after the continue statement
executes
• In for statements, the increment expression executes, then the loop-continuation test evaluates

Answer 17

continue statement in while, for, and do-while

Question 18

operator is used to ensure that two conditions are both true before
choosing a certain path of execution

Answer 18

the && operator (AND)

Question 19

reverses the meaning of a condition (i.e., a true
value becomes false, and a false value
becomes true)
• Has only a single condition as an operand (i.e.,
it is a unary operator)
• Placed before a condition to evaluate to true if
the original condition (without the logical
negation operator) is false

Answer 19

!(condition) logical negation

Question 20

passes information from inside a function back to the point in the program where it was called

Answer 20

return statement

Question 21

a programmer-defined function that is used to determine and

return the largest of three floating-point values.

Answer 21

maximum

Question 22

Method that rounds its argument down to the closest integer

Answer 22

Math.floor

Question 23

Random number generation

Answer 23

Math.random()

Question 24

a standard object model and programming interface for

HTML.

Answer 24

HTML DOM

Question 25

a standard for how to get, change, add, or

delete HTML elements.

Answer 25

HTML DOM

Question 26

is an API that allows programs to

interact with HTML (or XML) documents

Answer 26

Document Object Model

Question 27

JavaScript programs access the DOM through a host object named

Answer 27

document

Question 28

gives you scripting access to all the elements on a web

page.

Answer 28

DOM

Question 29

modern browsers have implemented (almost) the same methods and
properties for JavaScript interactivity, it is often referred to

Answer 29

Browser Object Model (BOM)

Question 30

window.location.href RETURNS?

Answer 30

href, URL of the current page

Question 31

window.location.hostname RETURNS?

Answer 31

domain name of the web host

Question 32

window.location.pathname RETURNS?

Answer 32

path and file name of the current page

Question 33

window.location.protocol RETURNS?

Answer 33

protocol used

eg (http:// or https://)

Question 34

window.location.assign() RETURNS?

Answer 34

loads a new page