Deck 10: Creating Pop-Up Windows, Adding Scrolling Messages, and Validating Forms

Question 1

The comparison,____,is true if a equals b and the data are of the same type.

A)a=b
B)a==b
C)a===b
D)a< >b

Answer 1

C

Question 2

The ____ object component of a scrolling message defines where the scrolling message displays.

A)visibility
B)message
C)display
D)text

Answer 2

C

Question 3

A(n)____ is any expression that evaluates to true or false.

A)operand
B)logical
C)concatenation
D)condition

Answer 3

D

Question 4

Which of the following conditional operators evaluates as true if both conditions are true?

A)&&
B)!!
C)==
D)!=

Question 5

The ____ component of a scrolling message regulates the speed in which the characters display in the text field.

A)delay
B)chronological
C)timing
D)speed

Question 6

To determine if the current value of the beginPos variable is greater than the length of the message,use the ____ statement.

A)for
B)comp
C)if
D)while

Question 7

Which of the following event handlers triggers JavaScript code when used with buttons and links?

A)onLoad
B)onUnload
C)onClick
D)onSubmit

Question 8

The text field that displays a scrolling message must be part of a ____.

A)database
B)character set
C)condition
D)form

Question 9

Conditional operators are used to compare two ____.

A)formulas
B)objects
C)functions
D)operands

Question 10

The first part of the if statement includes ____.

A)JavaScript statements to execute if condition is true
B)JavaScript statements to execute if condition is false
C)the if (condition)
D)none of the above

Question 11

The ____ component of a scrolling message is the location of the next character in a text string.

A)display
B)position
C)location
D)space

Question 12

The JavaScript statement,____,automatically adds 1 to a variable.

A)variable*1
B)variable = variable * 1
C)variable+++
D)variable++

Question 13

A ____ function should have a mechanism that terminates the function when it completes its task.

A)recursive
B)delay
C)timeout
D)concatenated

Question 14

A(n)____ is an action,such as a mouse click or a window loading.

A)index
B)radix
C)method
D)event

Question 15

An operand is a ____ data type or value.

A)numerical
B)string
C)logical
D)all of the above

Question 16

A scrolling message displays either in a text field within the Web page or on the ____.

A)status bar
B)address bar
C)menu bar
D)any of the above

Question 17

Which of the following conditional operators always evaluates as true if a does not equal b?

A)a{b}
B)a==b
C)a >b
D)a!=b

Question 18

Although scrolling text can be assigned to a < div > tag container using the ____ property,it does not allow for as much control as a form object like a text field or button.

A)outerHTML
B)marquee
C)scrollText
D)innerHTML

Question 19

When using a(n)< ____ > text field,you can format the text using an inline style.

A)message
B)input
C)msg
D)scroll

Question 20

When the user performs an action,such as a mouse click,which of the following associates that action with a function?

A)an event handler
B)the < body > tag
C)a conditional operand
D)the setTimeout()method

Question 21

The ____ loop often is referred to as a counter-controlled loop.

A)while
B)until
C)do
D)for

Question 22

When you set the focus to a text field,the JavaScript statement automatically positions which of the following in the text box?

A)the insertion point
B)the END statement
C)both a and b
D)neither a nor b

Question 23

Which of the following operators is used by the isNaN()built-in function?

A)NOT
B)AND
C)OR
D)none of the above

Question 24

Which of the following is a built-in function of JavaScript?

A)parseInt()
B)parseFloat()
C)isNaN()
D)all of the above

Question 25

A(n)____ is a series of statements that executes repeatedly until it satisfies a condition.

A)index
B)baseline
C)loop
D)rotation

Question 26

The ____ loop relies on a conditional statement using numeric values.

A)do
B)while
C)until
D)for

Question 27

Which of the following attributes supplied in the open()method allow you to determine the size at which the new window initially displays?

A)top and bottom
B)width and height
C)size and resolution
D)extend and contract

Question 28

Which of the following raises 2 to the power of 3?

A)Math.pow(3,2)
B)Math.pow*2 *3
C)Math.pow(2,3)
D)Pow.math(2,3)

Question 29

What type of value does the isNaN()function return?

A)variable
B)Boolean
C)integer
D)decimal

Question 30

The general form of the pow()method is ____.

A)Math.pow(number,exponent)
B)Math.pow(exponent,constant)
C)Math.pow(exponent)
D)Math.pow(number,constant)

Question 31

Using an HTML ____ list can ensure that accurate values are entered.

A)option
B)select
C)radio
D)validated

Question 32

If a condition in an if…else statement is true,the statements between the ____ after the if statement execute.

A)single quotation marks
B)angle brackets
C)parentheses
D)curly braces

Question 33

With the parseFloat()function,if the first character cannot be converted to a number,what is the result?

A)Null
B)NaN
C)Word
D)Radix

Question 34

Which of the following methods creates a pop-up window?

A)window()
B)valueIn()
C)open()
D)none of the above

Question 35

Which of the following relies on a conditional statement that can use either a numeric value or a string?

A)while loop
B)for loop
C)until loop
D)none of the above

Question 36

Which of the following event handlers is used to trigger an action when a document is loaded into the browser window?

A)onClick
B)onSubmit
C)onDblClick
D)onLoad

Question 37

If a value of 12Wre is entered,parseInt()will convert to ____.

A)12
B)12W
C)12Wr
D)Wre

Question 38

Which of the following is the general form for the JavaScript statement used to assign a value to a text field object within a form?

A)document.textfieldname.formname.value
B)textfieldname.value = variable_or_literal
C)document.formname.textfieldname.value = variable_or_literal
D)document.formname.textfieldname.value = variable_or_literal = documentname

Question 39

Which of the following is the general form of the focus()method?

A)document.objectname.eventname.focus()
B)document.formname.objectname.focus()
C)formname.objectname.document.focus()
D)document.focus()

Question 40

Which of the following is NOT a step performed by the dollarFormat()function?

A)separating the value to the left of the decimal point as the dollar amount
B)separating the value to the right of the decimal point as the cents amount
C)performing a calculation that returns a dollar amount
D)inserting a dollar sign immediately to the left of the first digit without spaces

Question 41

"Next" statements are used to define one or more statements that only should be executed based on the result of a conditional test.

Question 42

One reason to avoid assigning a scrolling message to the status bar is that users often do not look at the status bar.

Question 43

Which of the following objects is used with the onLoad event handler?

A)button
B)window
C)hyperlink
D)document

Question 44

Which of the following is a basic component of a scrolling message?

A)the message
B)the position
C)the delay
D)the table

Question 45

Which of the following can have values assigned to it?

A)text field
B)button
C)status bar
D)title bar

Question 46

The value property can be used to assign text to the contents of a text field.

Question 47

If operands are of the same data type,you will not get a true comparison result.

Question 48

Which of the following is a variable required by the user-defined scrollingMsg()function?

A)decipos
B)adMsg
C)scrollVar
D)beginPos

Question 49

To cause a message to scroll in the text field,you must increment the position locator variable by 5.

Question 50

The scrolling message is a text string assigned to a variable.

Question 51

The substring()method needs two parameters (x,y),where x is the starting point of the string and y is the location of the first character placed in the string.

Question 52

The position is the length of time between when a scrolling message ends and when it starts to appear again.

Question 53

The statement,beginPos = beginPos * 1,increments the beginPos locator by 1.

Question 54

The display object component of a scrolling message is a text string assigned to a variable._________________________

Question 55

Which of the following statements increments a variable by one?

A)++variable
B)variable = variable * 1
C)variable+++
D)variable++

Question 56

A scrolling message has three basic components._________________________

Question 57

The comparison,a===b,is true if a equals b and if the data are of the same type._________________________

Question 58

The comparison,a< b,is true if a is less tha b

Question 59

Stopping text in an < input > text field has predictable results._________________________

Question 60

A domain is a range of acceptable values for a field or column in a database._________________________

Question 61

Web developers use multiple techniques to validate Web forms using JavaScript.

Question 62

The Submit button object generally is used with the ____________________ event handler.

Question 63

When the initial value of the ____________________ variable is zero,the code sets the string message so the first character of the string appears in the text field.

Question 64

The isNaN()function is one of several functions that tests a numeric value as the argument.

Question 65

JavaScript has three types of loops: for loops,while loops,and if...then loops.

Question 66

The setTimeout()method is added at the end of the scrollingMsg()function to create a pause before it calls the scrollingMsg()function again.

Question 67

JavaScript uses typical programming language symbols to represent exponentiation in code.

Question 68

Attempting to place nested if statements to validate a series of text fields will not work with event-driven programming.

Question 69

The break()method is used to split a string based on an identified separator and a desired number of "sub" strings.

Question 70

The ____________________ object generally is used with the onLoad and onUnload event handlers.

Question 71

The onLoad event handler is placed with its associated function in the < html > tag to indicate that the onLoad event handler should call the function when the Web page loads.

Question 72

In an if…else statement,the statements between the curly braces after the else statement execute if the condition is true.

Question 73

The Math object can be used to create other objects.

Question 74

The isNaN()function converts a variable to a number.

Question 75

The statement,window.setTimeout("scrollingMsg()",200),calls the function scrollingMsg()every 200 seconds,allowing the message to scroll continuously through the text box.

Question 76

When a user triggers an event that calls a function,processing stays within that function until all statements execute.

Question 77

Most of the properties of the Math object return preset values.

Question 78

____________________ is a programming technique used to call the same function from within the function.

Question 79

The ____________________ method calls a function or evaluates an expression after a specified amount of time has elapsed,which is measured in milliseconds.

Question 80

In the statement,onLoad="scrollingMsg()",scrollingMsg is the event handler.