Question 1

What is the significance of the second function argument in the following line
Window.setInterval( "run()", 100 );

A) The value sets how many times to call the function specified in the first argument.
B) The value sets how long the function is run for.
C) The value sets how often to run the function.
D) The value sets the time to wait before calling the function once.

C

Accepted Answer

The second argument in `setInterval` specifies the interval in milliseconds at which the function should be repeatedly executed.

Question 2

In the statement node1.replaceChild( node2, node3 ) , ________ replaces ________.&#10;A) node3, node1&#10;B) node1, node3&#10;C) node2, node3&#10;D) node3, node2

Accepted Answer

In the method node1.replaceChild(node2, node3), node2 is the new node that will replace node3, which is the existing child of node1.

Question 3

Which of the following is the proper way to dynamically access the background color&#10;A) document.body.style.BackgroundColor&#10;B) document.body.attributes.BackgroundColor&#10;C) document.body.style.backgroundColor&#10;D) document.body.style.background-color

Accepted Answer

C

Question 4

Which of these is the method of the window object that stops repetitive calls to a method&#10;A) clearTimer&#10;B) stopTimer&#10;C) stopInterval&#10;D) clearInterval

Accepted Answer

The `clearInterval` method is used to stop the repetitive calls to a method that were set up using `setInterval`.

Question 5

The elements in a web page are represented by a(n) ________.&#10;A) object hierarchy&#10;B) parent tree&#10;C) dynamic HTML&#10;D) DOM property

Accepted Answer

The elements in a web page are represented by a(n) object hierarchy. An object hierarchy is a tree-like structure that represents the relationships between objects in a system. In a web page, the object hierarchy represents the relationships between the elements on the page. The root of the object hierarchy is the document object, which represents the entire web page. The document object has child objects, which represent the elements on the page. The child objects can have their own child objects, and so on.

Question 6

Function getElementById returns a(n)________.&#10;A) boolean&#10;B) string&#10;C) id attribute&#10;D) object

Accepted Answer

getElementById returns an object, specifically a reference to the first element with the specified ID in the document.

Question 7

Which of the following is not a DOM collection&#10;A) roots&#10;B) anchors&#10;C) links&#10;D) forms

Accepted Answer

Roots is not a DOM collection. It is a term used to describe the top-level elements of a document.

Question 8

An HTML5 element inside another element is a ________ of the containing element.&#10;A) parent&#10;B) child&#10;C) instance&#10;D) sub-element

Accepted Answer

An HTML5 element inside another element is a child of the containing element.

Question 9

The fifth link on a page can be accessed using&#10;A) links.item(4)&#10;B) links[4]&#10;C) either a or b&#10;D) neither a nor b

Accepted Answer

In JavaScript, both `links.item(4)` and `links[4]` can be used to access the fifth link on a page, as they both refer to the same element in the `links` collection.

Deck 12: Document Object Model Dom: Objects and Collections