What must be true of a JavaScript function to allow it to be used within an expression.

Question 1 options:

1)	Nothing; any JavaScript function can be used in an expression.

2)	It must return a value of type other than "undefined."

3)	It must have an explicit "return" operator.

4)	It must be called with at least one argument.

Save

Question 2 (5 points)

A Web developer wants to let the browser determine the initial positions of an element on a page, but wants to be able to move it later by using JavaScript. What position parameter should the developer code?

Question 2 options:

1)

Static

2)	None; positioning by the browser is the default

3)

Relative

4)

Absolute

Save

Question 3 (5 points)

When variables are passed as arguments to a JavaScript function, are they passed by value or by reference? (Passing by reference is also called passing by name.)

Question 3 options:

1)

By value.

2)	By reference.

3)	Scalars are passed by value and objects are passed by reference.

4)	Scalars are passed by reference and objects are passed by value.

Save

Question 4 (5 points)

Some CSS names contain hyphens, for example, margin-left. JavaScript must be able to refer to CSS properties. How are such names expressed in JavaScript?

Question 4 options:

1)	Delete the hyphen and capitalize the following letter: marginLeft.

2)	No change is necessary: margin-left.

3)	Delete the hyphen: marginleft.

4)	Escape the hyphen with a backslash: margin\-left.

Save

Question 5 (5 points)

What does the JavaScript confirm( ) method do?

Question 5 options:

1)	Displays a dialog box with the message given as an argument and with OK/Cancel buttons; returns true if OK is pressed, false if Cancel is pressed.

2)	Displays a dialog box with the message given as an argument and with an OK button; always returns true.

3)	Displays a dialog box with an input field containing the message given as an argument and returns true if the message is unchanged, otherwise returns false.

4)	Sends a confirming message to the server that form data has been checked. The form name is passed as an argument.