Which of the following return an array

Assignment Help Computer Engineering

Reference no: EM132117129

Answer the following Multiple Choice Questions :

QUESTION 1

Which of the following are new HTML5 tags. Choose all that apply.

section

header

footer

nav

tuple

QUESTION 2

The following instruction would return the local storage value associated with the key="January"

x = localStorage['January'];

True

False

QUESTION 3

The localStorage object stores data that has an expiration data of 1 month.

True

False

QUESTION 4

_____ would retrieve the local storage value associated with a key = "city".

localStorage.getItem(v, "city")

v = localData.getValue("city", "Chicago")

localStorage.setItem("city", v)

v = localStorage.getItem('city')

QUESTION 5

Only DOM nodes that are part of a HTML form have a style property.

True

False

QUESTION 6

The _____ property of the document object contains an array of all the style sheets on a page.

styleChildren

styleSheets

styleLink

styleSrc

QUESTION 7

CSS vendor prefixes are a way for browser companies to add support for experimental features before those features become part of the CSS specification.

True

False

QUESTION 8

The dom is not available for programming until the page finishes loading.

True

False

QUESTION 9

"With the exception of a few array methods that can't be used, a collection of DOM child nodes looks and behaves like an array."

True

False

QUESTION 10

Assume a html unordered list tag with an id property, like this: <ol id = 'todoList'>... We execute this statement:

L = document.getElementById("todoList");

L.childNodes[0]; refers to the first list item (li)

L.childNode[0]; refers to the first list item (li)

L.childNode[1]; refers to the first list item (li)

L.childNodes[1]; refers to the first list item (li)

QUESTION 11

getElementsByClassName() is not supported by Microsoft until IE9

True

False

QUESTION 12

Adding a new node to the DOM tree requires 2 steps. Which 2?

createChild()

createElement()

appendElement()

appendChild()

QUESTION 13

If the following code were placed in a style sheet, #hottag would be a CSS _____.

.caution {font-size: 12pt; color: blue;}
#hottag {width: 620px;}

tag selector

ID selector

class selector

class property

QUESTION 14

The form tag's method attribute ____.

determines the URL the form is submitted to

determines how form data is submitted

determines if cookies are encrypted or not

determines whether the form submission occurs or not

QUESTION 15

You have 6 radio buttons all with the name radColor on a html form named f1. If the user checks the last radio button listed, what is the value of x after this code runs?

for(var i=0; i<6; i++) {
if(document.f1.radAge[i].checked == true) {
var x = i;
}
}

QUESTION 16

The ____ method returns the first element in a document with a matching id attribute.

getElementByTab()

getElementByName()

getElementById()

getElementByIdTag()

QUESTION 17

"If a HTML select element (a drop-down list) displays only a single option, then the item at index 1 is selected by default."

True

False

QUESTION 18

"The options for a HTML select list are ordered like an array, with the first option being at index 0, the second option at index 1, and so on."

True

False

QUESTION 19

The ____ property of the Image object allows JavaScript to dynamically change an image.

img

src

path

file

QUESTION 20

Which of the following return an array? Choose all that apply.

getElementById()

getEementsByTagName()

getElementsByName()

getElementsByClassName()

QUESTION 21

"You want a submitted form to be validated before submittion, the form is to be submitted using a submit button, and you use the onsubmit() event handler of the form tag to call the function that validates the HTML form. So _____."

such an approach would never work in a million years

the validation function that is called must return either true or false

QUESTION 22

The _____ DOM method allows inserting a new DOM node before an existing DOM element.

setAttribute()

insertBefore()

appendChild()

addFirst()

QUESTION 23

Which of the following would create a new script element?

createElement("script").value = x;

x = createElement("script");

document.createElement = "script";

x = document.createElement("script");

QUESTION 24

The form tag's _____ attribute determines the URL of the page on the web server that a form is submitted to.

accept-charset

enctype

method

action

QUESTION 25

The _____ DOM method puts a created element into the DOM as the last child of the parent node.

setAttribute()

insertBefore()

appendChild()

append()

QUESTION 26

"If an element has a default action, the event handler for that element runs before the default bahavior occurs."

True

False

QUESTION 27

"When you have a group of radio buttons or checkboxes, you can use the ____ property to determine which element or elements in the group is selected."

value

size

checked

option

QUESTION 28

You have a form named f1 and a textbox in that form named txtName. What happens when the if-block executes?

if(document.f1.txtName.value != "")

the test is true if the user has typed something in the textbox.

the test is false if the user has not typed something in the textbox.

QUESTION 29

Using a select list with an id of "toppings", you can get the selected option value using ____.

opt = document.getElementbyId("toppings").value;

"opt = document.getElementbyId("toppings") {value};

opt = document.getElementbyId("toppings")[value];

opt = document.getElementbyId("value");

QUESTION 30

____ allows JavaScript to store and retrieve an image from memory rather than download the image each time it is needed from the web server.

Image refreshing

Image caching

Image quick loading

Double buffering

QUESTION 31

"If a CSS property is called font-weight, what would the corresponding javaScript reference be?"

fontWeight

font.weight

font-Weight

FontWeight

QUESTION 32

In a style sheet, #sidebar and .caution, as shown below, would be called CSS _____.

tokens

selectors

labels

markers

QUESTION 33

The _____ DOM method allows removing a node

removeChild()

removeItem()

deleteItem()

deleteChild()

QUESTION 34

"If a HTML element has a default event, you can cancel the default action by _____ the event handler."

returning false from

quashing

executing the document.noEvents() method of

QUESTION 35

If the following code was placed in a style sheet, .caution would be a CSS _____.

tag selector

ID selector

class selector

class property

QUESTION 36

"In a group of checkboxes, all of which have the same name, only one of the boxes can be selected by the usesr."

True

False

QUESTION 37

A web page has a single paragraph. That paragraph contains a single phrase: "pie are round". How would you change the contents of the paragraph to "pi r square"?

document.getElementsByTagName("p").innerHTML =="pi r square";

document.getElementsByTagName("p")[0].innerHTML= "pi r square";

document.getElementsByTagName("p")[1] = "pi r square";

document.getElementsByTagName("p").innerHTML("pi r square");

QUESTION 38

"To be certain that all images are downloaded into a cache before commencing an animation sequence, you can use the ____ event handler of the Image object."

oncache

onsaved

onopen

onload

Reference no: EM132117129

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