Deck 10: Programming with JavaScript

Question 1

Parameter values cannot be variables themselves.

Answer 1

False

Question 2

The great advantage of a function is that you can reuse it.

Answer 2

True

Question 3

Some JavaScript functions require parameters,which are variables associated with the function.

Answer 3

True

Question 4

JavaScript commands can be inserted directly into an HTML file rather than being placed in a separate program file.

Question 5

Early on,a problem with Java was that nonprogrammers found it difficult to learn and use to write their own Java applets.

Question 6

Function parameters must be placed within parentheses,following the function name,and the parameters must be separated by periods.

Question 7

Most JavaScript commands and names are not case sensitive.

Question 8

In Java,programs cannot write content to the hard disk.

Question 9

Spam reduces productivity by forcing employees to wade through numerous spam messages every day to find messages that are truly relevant.

Question 10

The document.write()and document.writeln()methods reflect the object-oriented nature of the JavaScript language.

Question 11

It is common practice for JavaScript programmers to create libraries of functions located in external files that are easily accessible to many Web pages.

Question 12

When the browser loads the HTML file containing a function,the browser bypasses the function without executing it; the function is executed only when called by another JavaScript command.

Question 13

If a function returns a value,it can be stored in a variable.

Question 14

Where you place a function in the HTML file is unimportant.

Question 15

Essentially,Java and JavaScript are the same.

Question 16

You cannot use words that JavaScript has reserved for other purposes when you create a variable name.

Question 17

Users need to work with a developer's kit to compile a JavaScript program.

Question 18

JavaScript code can be inserted directly into an HTML file,or placed in a separate text file that is linked to the Web page.

Question 19

A function cannot be designed to return a value.

Question 20

In client-side programming,programs that run on the client side directly change the server data.

Question 21

In XHTML,the language attribute is used to indicate the script language in the

Question 22

A multiline comment begins with a /* and ends with a */._________________________

Question 23

If you place JavaScript code in a separate file,the different pages in your Web site can use the programs you write in the same way that an entire site can use an external style sheet._________________________

Question 24

A(n)____ is a person who sends out unsolicited e-mails.

A) analyst
B) spammer
C) harvester
D) staffer

Question 25

With server-side scripts,computing is distributed over the Web,so that no one server is overloaded with programming requests._________________________

Question 26

____ is essentially junk e-mail.

A) Spam
B) Client-side
C) Server-side
D) An e-mail harvester

Question 27

Although not a requirement,one programming convention is to place all of the function definitions used in the Web page within the head section._________________________

Question 28

Function names,unlike variable names,are case-sensitive._________________________

Question 29

You can ____ an e-mail address to prevent it from being grabbed by programs that scan Web pages.

A) inherit
B) compile
C) spam
D) scramble

Question 30

____ can be used to look for e-mail addresses by scanning Web pages.

A) Spam
B) Server-side
C) An e-mail harvester
D) Client-side

Question 31

A global variable has local scope only._________________________

Question 32

Which of the following does not have features to scramble or unscramble e-mail addresses?

A) HTML
B) XHTML
C) XML
D) both a and b

Question 33

A text string indicates that no value has yet been assigned to the variable._________________________

Question 34

Any variables not declared within functions have local scope._________________________

Question 35

A numeric value is any group of characters such as "Hello." _________________________

Question 36

You can declare multiple variables by entering the variable names in a comma-separated list._________________________

Question 37

The Boolean values are on and off._________________________

Question 38

You should declare a variable in JavaScript by using the syntax: var variable;._________________________

Question 39

A hacker is a person who sends these unsolicited e-mails,sometimes in bulk e-mailings involving tens of thousands of recipients._________________________

Question 40

You should place all script elements that reference external files in the document head._________________________

Question 41

One way to handle the way that XML parsers treat the content of a JavaScript program is to place the JavaScript code within a(n)____ section.

A) CDATA
B) PCDATA
C) XML
D) ASP

Question 42

JavaScript supports comment tags,using a set of double ____ at the beginning of a line that instructs the browser to ignore the line and not interpret it as a JavaScript command.

A) backslashes
B) commas
C) periods
D) slashes

Question 43

Java requires that users have access to the ____ in order to create an executable Java applet.

A) DTD
B) JDK
C) ECMA
D) DDL

Question 44

Placing JavaScript code in a Web page file means that users need to retrieve only ____ file from the server.

A) one
B) two
C) duplicate
D) text

Question 45

You use the ____ tag to distinguish JavaScript code from the text that you want displayed on a Web page.

A)
B)
C)

Question 46

There is no limit to the number of ____ elements used within a Web page.

A) mime
B) type
C) script
D) jscript

Question 47

Which of the following is NOT an alternative that helps avoid problems with XML parsers?

A) comment the Javascript
B) use CDATA sections
C) use external scripts
D) all of the above

Question 48

The text string specified by the document.write()method can be enclosed within ____.

A) double quotation marks
B) single quotation marks
C) commas
D) either a or b

Question 49

Scripting languages are distinguished by their ____ types.

A) MIME
B) DTD
C) XML
D) DDL

Question 50

The type attribute value for JavaScript is ____.

A) text/js
B) text/javascript
C) script/js
D) script/javascript

Question 51

JavaScript requires _____ programming knowledge and experience as Java.

A) more
B) less
C) the same
D) twice as much

Question 52

Each JavaScript command line ends with a(n)____ to separate it from the next command line in the program.

A) comma
B) ampersand
C) semicolon
D) period

Question 53

_________ code can be inserted directly into an HTML file or placed in a separate text file that is linked to a Web page.

A) JavaScript
B) Java
C) JScript
D) Java Applets

Question 54

____ is an interpreted language,meaning that the program code is executed directly without compiling.

A) JavaScript
B) Java
C) C++
D) All of the above

Question 55

____ is the process by which a program is converted from a text file of code into an executable file called an applet.

A) Inheritance
B) ECMA
C) Scripting
D) Compiling

Question 56

Scripts can be placed in a ____ section of a Web page.

A) head
B) body
C) both a and b
D) none of the above

Question 57

____-side programs do not require users to wait for data to be sent over the Internet to a Web server.

A) Server
B) File
C) Client
D) Database

Question 58

A(n)____ retrieves a Web page from the server.

A) programmer
B) server-side program
C) user
D) information set

Question 59

In earlier versions of HTML,the ____ attribute was used to indicate the scripting language.

A) type
B) language
C) MIME
D) src

Question 60

What is Internet Explorer's scripting language called?

A) IEScript
B) VBScript
C) Oak
D) JavaScript

Question 61

JavaScript is ____,so you must pay attention to whether or not letters are capitalized.

A) case insensitive
B) case sensitive
C) case indifferent
D) none of the above

Question 62

In the figure above,what are the variables?

A) userName
B) emServer
C) emLink
D) all the above

Question 63

In naming a variable,the first character must be either a letter or a(n)____.

A) underscore
B) pound sign
C) number sign
D) ampersand

Question 64

Another method to write text to the Web page is the ____ method.

A) document.writeln()
B) document.writeline()
C) document.insrtln()
D) document.insrtline()

Question 65

____ are useful because they can store information created in one part of your program and use that information in another.

A) Conditional operators
B) Logical operators
C) Assignment operators
D) Variables

Question 66

You can indicate that a statement continues on the next line using a ____.

A) comment
B) forwardslash
C) backslash
D) comma

Question 67

One can create a ____ variable to determine whether the user is running the Safari browser.

A) null
B) string
C) conditional
D) Boolean

Question 68

A(n)____ variable has no value at all.

A) null
B) empty
C) cipher
D) negative

Question 69

Before you use a variable in a JavaScript program,you should ____ it.

A) compile
B) concatenate
C) declare
D) nullify

Question 70

Which of the following formats is not a numeric value data type?

A) "12"
B) 11.5
C) 3
D) 5.1E2

Question 71

In the figure above,what is the value stored in emLink?

A) [e-mail]
B) [e-mail]
C) userName@emServer
D) none of the above

Question 72

An action for the browser to take in a script is called a ____.

A) command
B) statement
C) both a and b
D) none of the above

Question 73

Variable declarations should be placed at the ____ of your program to make your code easier to interpret.

A) middle
B) end
C) beginning
D) none of the above

Question 74

You can cause a variable to have no value by assigning it the value ____.

A) 0
B) null
C) empty
D) " "

Question 75

Variable names cannot contain ____.

A) numbers
B) spaces
C) underscore characters
D) any of the above

Question 76

You can declare a variable in JavaScript using the ____ command.

A) dec
B) var
C) this
D) val

Question 77

A(n)____ variable is any group of characters,such as "Hello" or "Happy Holidays!".

A) Boolean
B) data
C) text string
D) null

Question 78

You can display single quotation marks with the document.write()method by enclosing your text string within ____.

A) periods
B) double quotation marks
C) parentheses
D) brackets

Question 79

JavaScript supports how many data types?

A) 1
B) 2
C) 3
D) 4

Question 80

JavaScript ____ most occurrences of white space.

A) repeats
B) ignores
C) comments
D) executes