JavaScript

Question 14 (1 point)

Which of the following statements about check boxes is true?

Question 14 options:

	Each check box must have a unique id attribute.
	The name and id attributes of each check box should be set to the same value.
	Each check box is independent of the other check boxes on a page.
	All of the above.

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Question 15 (1 point)

How can you clear a check from a Checkbox object?

Question 15 options:

	set its clear property to true
	set its checked property to false
	set its value property to an empty string
	call its blur() method

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Question 16 (1 point)

What property of the Radio object is used to determine if a radio button is selected?

Question 16 options:

	the value property
	the checked property
	the selected property
	the radio property

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Question 17 (1 point)

What property would you use to get the text that has been entered into a text area?

Question 17 options:

	value
	text
	name
	string

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Question 18 (1 point)

What method would you use to remove the focus from a control?

Question 18 options:

	focus()
	blur()
	remove()
	value()

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Question 19 (1 point)

What event occurs when the user selects a new item from a select list?

Question 19 options:

	click
	dblclick
	change
	select

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Question 20 (1 point)

Assuming you have a radio button with an id of contact_via, which of the following statements selects that radio button?

Question 20 options:

	$("contact_via").selected = true;
	$("contact_via").checked = true;
	$("contact_via").value = true;
	$("contact_via").enabled = true;

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Question 21 (1 point)

Why would the following code for a button not send the form data to the server?

Question 21 options:

	The value of the id attribute should be submit.
	The name attribute is missing.
	The value of the type attribute should be submit.
	The submit attribute is missing.

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Question 22 (1 point)

What does the following code do? $("email").firstChild.nodeValue = "Entry is invalid.";

Question 22 options:

	Sets the text for the element with email as its id attribute.
	Gets the text for the element with email as its id attribute.
	Sets the text for the first child of the element with email as its id attribute.
	Sets the text for the next child of the element with email as its id attribute.

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Question 23 (1 point)

For the following code, an event handler named investmentChange is var investmentChange = function() { var years = parseInt( $("years").value ); alert("Years: " + years); }; window.onload = function() { $("investment").onchange = investmentChange; };

Question 23 options:

	attached to the onload event of the global window object
	attached to the onload event of a control with an id of investment
	attached to the onchange event of the global window object
	attached to the onchange event of a control with an id of investment

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Question 24 (1 point)

Given HTML that includes the element

shipping cost goes here

what will the following code do if the user enters 100 at the prompt? var getInfo = function() { var cost = parseFloat(prompt("How much does the item cost?")); var ship = cost * .06; document.getElementById("ship").innerHTML="Shipping: $" + ship.toFixed(2); };

Question 24 options:

	It will display shipping cost goes here Shipping: $6.00 in the element.
	It will replace the text in the element with Shipping: $6.00.
	It will display NaN in the element because the starting text in this element is not a number.
	It will calculate the value of the ship variable, but the element will remain unchanged.

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Question 25 (1 point)

To view the changes that have been made to the DOM for a page by the JavaScript, you can

Question 25 options:

	display the HTML for the page in a browser
	display the HTML for the page in Chromes Sources panel
	display the HTML for the page in Chromes Elements panel
	none of the above

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Question 26 (1 point)

What does the following line of code do? $("user").innerHTML = "Hello, good friend!";

Question 26 options:

	It sets the content of the element with user as its id attribute to Hello, good friend!
	It sets the value property of the element with user as its id attribute to Hello, good friend!
	It gets the content of the element with user as its id attribute and appends Hello, good friend! to that content.
	It gets the value property of the element with user as its id attribute and appends Hello, good friend! to that property.