Deck 13: Programming for Web Forms Tutorial

Question 1

Word boundaries are indicated by the \b symbol.

Answer 1

True

Question 2

The input.defaultValue method returns whether the input box is read-only or not.

Answer 2

False

Question 3

The Luhn Algorithm provides a quick validation check on an account number by ensuring that the sum of the digits in the number meet certain mathematical criteria

Answer 3

True

Question 4

To determine which option button has been checked by the user, you must examine the disabled property of each button.

Question 5

The element.valid property of Constraint Validation API returns true if element fails validation.

Question 6

The select.name method returns the selection list field name.

Question 7

Each field/value pair is separated by the * character.

Question 8

The \D character signifies a digit from 0 to 9.

Question 9

The option.text method returns the field value of option .

Question 10

The regular expression for 4-digit CVC numbers used by American Express card holders is /^\d{4}$/ .

Question 11

The charAt() method can extract long text strings.

Question 12

For options buttons and check boxes, you can use the onclick event handler in response to the user clicking those elements.

Question 13

With no arguments, the toLocaleString() method displays the numeric value using the local standards on the user's computer.

Question 14

The element.onselect event handler signifies that the element value is invalid.

Question 15

To make a regular expression insensitive to case, add the i flag to the regular expression.

Question 16

You can control the number of digits displayed by the browser using the toFixed() method.

Question 17

You can load a new page in the current window with the window.location = url command.

Question 18

To extract useful information from the query string, you must first work with the properties and methods of the location object.

Question 19

The value associated with a checked box is stored in the name property of the check box object.

Question 20

The element.value = value; expression is applied to set the value of an input control.

Question 21

Identify the reason for which attribute is added to a form element.

A) To find the pathname of the URL
B) retrieve specific information about the URL
C) To append form data to the URL
D) To load a new document with the URL

Question 22

Which of the following selection list properties returns true if more than one option can be selected from the list?

A) select.options
B) select.length
C) select.size
D) select.multiple

Question 23

Which of the following location methods returns the href portion of the location's URL?

A) location.assign(newurl)
B) location.hash
C) location.toString()
D) location.searchname

Question 24

Identify the description of the option.selected property.

A) It returns true if the option has been selected by default.
B) It returns true if the option has been selected by user.
C) It returns true if more than one option can be selected from the list.
D) It returns true if no option can be selected from the list.

Question 25

Which of the following expressions can be used to reference a form element using its name or id attribute?

A) form.elements.ename;
B) ename.form.elements;
C) elements.form.ename;
D) ename.elements.form;

Question 26

The _____ property returns a Boolean value indicating whether the option button, option , is currently checked by a user.

A) option.value
B) option.checked
C) option.defaultChecked
D) option.name

Question 27

Identify the input field property or method that can be used to return the current value displayed in the input box.

A) input.focus()
B) input.defaultValue
C) input.blur()
D) input.value

Question 28

Identify the options object collection in which the selection list options are organized.

A) select.options
B) options.length
C) select.options[idref]
D) idref.options[select]

Question 29

Using the _____, you can direct the browser to retrieve specific information about the URL, to reload the current page, or to load an entirely new page.

A) selection list
B) hidden field
C) reference form
D) location object

Question 30

Which of the following CSS selector returns the option button that is checked within the protection field?

A) input[name="protection"]:checked
B) name[input="protection"]:checked
C) name[input="checked"]:protection
D) input[name="checked"]:protection

Question 31

Radio buttons are grouped by a common field name placed within the _____ array.

A) options[idref]
B) length[idref]
C) select.options[idref]
D) select.length[idref]

Question 32

Which of the following descriptions corresponds to the currency:code option from the toLocaleString() method?

A) Currency symbol to use for currency formatting where code designates the country or language
B) Currency symbol to use for currency formatting where code is the ISO currency code
C) Currency symbol to use for indicating whether to use a thousands grouping symbol (true) or not (false)
D) Currency symbol to use for currency formatting where code is "symbol" for a currency symbol

Question 33

Since a page can contain multiple web forms, JavaScript organizes the forms into _____ object collection.

A) document.idref[forms]
B) idref.document[forms]
C) document.forms[idref]
D) forms.document[idref]

Question 34

_____ is a selection list property that returns the number of options displayed in the selection list.

A) select.options
B) select.length
C) select.size
D) select.multiple

Question 35

The _____ option from the toLocaleString() method indicates whether to use a thousands grouping symbol (true) or not (false) .

A) style: type
B) minimumSignficantDigits: num
C) useGroup: Boolean
D) maximumSignificantDigits: num

Question 36

Identify the toLocaleString() method that gives you more control while formatting numeric values.

A) locale.toLocaleString(value, {options})
B) value.toLocaleString(locale, {options})
C) options.toLocaleString(locale, {value})
D) value.toLocaleString(options, {locale})

Question 37

For options buttons and check boxes, use the _____ event handler in response to the user clicking those elements.

A) onselect
B) onreset
C) onclick
D) oninput

Question 38

Identify the method associated with browser locations that can find the protocol, hostname, and port number of the URL.

A) location.pathname
B) location.hash
C) location.origin
D) location.search

Question 39

Identify the input field property or method that can be used to remove the focus from the input box.

A) input.focus()
B) input.pattern
C) input.blur()
D) input.required

Question 40

In many web forms, important data is stored within _____ so that the data is available to programmers but removed from the user's control.

A) event handlers
B) hidden fields
C) reference forms
D) radio buttons

Question 41

To create a negative character class that matches any character not in the class, preface the list of characters with the _____ symbol.

A) ^
B) #
C) &
D) *

Question 42

What does & signify in the string "R2D2&C3PO"?

A) A new line between words
B) A white space between words
C) A character between words
D) A boundary between words

Question 43

In a regular expression, you can define two possible patterns for the same text string by joining different patterns using the _____ character. 13

A) &
B) *
C) +
D) |

Question 44

Identify the description for the \b character type.

A) Not a word boundary
B) A blank space
C) A word boundary
D) Any character

Question 45

Identify the use of string.indexOf(str [,start]) method.

A) To create an array of substrings
B) To extract text strings known as substrings
C) To reference a character
D) To search for the occurrence of a substring within larger text strings

Question 46

Which of the following character types is used for any non-white-space character?

A) \s
B) \S
C) \w
D) \W

Question 47

Which of the following objects is used by JavaScript to store the reason for failing validation?

A) ValidityState
B) checkValidity
C) willValidate
D) noValidate

Question 48

Which of the following should be appended to a character to repeat it n times?

A) [ n ]
B) " n "
C) { n }
D) ( n )

Question 49

When the browser encounters a character in a field name or value that is reserved for other purposes, it replaces the character with a character code known as the _____.

A) URL query string
B) form field
C) radio button
D) URI encoded character

Question 50

In addition to a specified pattern of characters, all legitimate credit card numbers must satisfy the Luhn Algorithm also known as the _____.

A) Euclid's Algorithm
B) Mod10 Algorithm
C) Verhoeff Algorithm
D) Damm Algorithm

Question 51

The regular expression pattern for a character class is _____.

A) *chars*
B) [chars]
C) (chars)
D) /chars/

Question 52

Which of the following methods can be used to extract longer text strings?

A) slice.string(start [,end])
B) string.start(slice [,end])
C) string.slice(start [,end])
D) slice.start(string [,end])

Question 53

Identify the action for which the g flag is added at the end of the regular expression /pattern/ .

A) To perform a global search
B) To create an array of substrings
C) To make a regular expression insensitive to case
D) To retrieve field values from selection lists and radio buttons

Question 54

Identify the object constructor that can be used to create a text string explicitly.

A) var stringVar = new String(text
B) new string stringVar = var(text
C) stringVar = new String(var);
D) var stringVar = new Stringvar(var);

Question 55

Regular expressions have the general form denoted as _____.

A) *pattern*
B) [pattern]
C) /pattern/
D) //pattern//

Question 56

The code of a regular expression can be directly entered in JavaScript as a _____.

A) regular expression pattern
B) regular expression literal
C) regular expression match
D) regular expression symbol

Question 57

Identify the method that can be used to create an array of substrings.

A) strArray = split.string (str)
B) strArray = string.split(str)
C) strArray = str.split(string)
D) strArray = (str)string.split

Question 58

Which of the following methods can be used to reference a character at the index i of the string?

A) string.charAt(I)
B) string(i).charAt
C) charAt.string(i)
D) charAt(i).string

Question 59

Identify the collective term that denotes the form validation properties and methods built into JavaScript that can be used to supplement the native browser validation tools.

A) pop-up error messages
B) Custom validation messages
C) Constraint Validation API
D) Remote Method Invocation API

Question 60

Identify the syntax used to group character symbols so they can be treated as a single unit.

A) {pattern}
B) (pattern)
C) [pattern]
D) "pattern"

Question 61

Case based critical thinking Case 13-1 Sarah wants to set the value of an input control. She applies the element.value = value; expression. Which of the following methods should Sarah use to return the default value for the input box?

A) input.value
B) input.focus()
C) input.defaultValue
D) input.select()

Question 63

Case based critical thinking Case 13-5 William is exploring the syntax of regular expressions. He learns that in the regular expression language, a word refers to any string of symbols consisting solely of word characters. He also learns that word boundaries are indicated by the \b symbol. He wants to use a pattern that matches any word that starts with the characters "great" such as "greater", "greatness", or "greatest" Which of the following patterns should William use?

A) //bgreat/
B) /\bgreat/
C) /bgreat/
D) /b\great/

Question 65

Case based critical thinking Case 13-4 Samantha is working on a web document. She wants to direct the browser to retrieve specific information about a URL, to reload the current page, and to load an entirely new page. Which of the following commands can Samantha use to load a new page in the current window?

A) window.location = url
B) url.window = location
C) window.url = location
D) location.url = window

Question 66

Case based critical thinking Case 13-3 Thomas is working on reference forms and form fields. He wants to use event handlers that can respond to user actions within a form. He uses the element.onchange event handler. Identify the description of the event handler Thomas has used.

A) The element has received user input
B) The value of element has been modified
C) The element value is invalid
D) The form element has lost the focus

Question 68

Case based critical thinking Case 13-4 Samantha is working on a web document. She wants to direct the browser to retrieve specific information about a URL, to reload the current page, and to load an entirely new page. Identify the object that Samantha should use to meet her desired requirements.

A) location
B) option
C) form
D) string

Question 69

Case based critical thinking Case 13-2 Lisa can control the number of digits displayed by the browser using the toFixed() method. However, since the toFixed() method is limited to only defining the decimal place accuracy, she wants to use a method that gives her more control over the numeric format, such as formatting numbers as currency or separating thousands with the comma symbol. Which of the following methods should Lisa use to format the numbers as currency?

A) currency: code
B) toLocaleString()
C) useGroup: Boolean
D) element.oninput

Question 70

Case based critical thinking Case 13-3 Thomas is working on reference forms and form fields. He wants to use event handlers that can respond to user actions within a form. He uses the element.onchange event handler. Which event handler should Thomas use for options buttons and check boxes in response to the user clicking those elements?

A) element.onfocus
B) element.onreset
C) element.onblur
D) element.onclick

Question 73

Explain how the Luhn Algorithm can be used to test for legitimate card numbers.

Question 74

Explain how you can work with radio buttons and check boxes.

Question 75

Explain how you can work with selection lists.

Question 76

Case based critical thinking Case 13-1 Sarah wants to set the value of an input control. She applies the element.value = value; expression. What does element signify in the expression that Sarah has used?

A) Reference to a form element
B) Index number of the form
C) Value to be stored in the element
D) Reference to a web form

Question 77

Case based critical thinking Case 13-5 William is exploring the syntax of regular expressions. He learns that in the regular expression language, a word refers to any string of symbols consisting solely of word characters. He also learns that word boundaries are indicated by the \b symbol. He wants to use a pattern that matches any word that starts with the characters "great" such as "greater", "greatness", or "greatest" Which of the following patterns should William use to match any word that ends with "ust" such as "dust", "trust", or "must"?

A) /ust\b/
B) /\bust/
C) \bust/
D) /b\ust/

Question 78

Case based critical thinking Case 13-2 Lisa can control the number of digits displayed by the browser using the toFixed() method. However, since the toFixed() method is limited to only defining the decimal place accuracy, she wants to use a method that gives her more control over the numeric format, such as formatting numbers as currency or separating thousands with the comma symbol. If Lisa uses minimumIntegerDigits: num method, which of the following is the correct range for num ?

A) 0 to 20
B) 1 to 20
C) 0 to 19
D) 1 to 21