Implement program flow - Programming in HTML5 with JavaScript and CSS3 - page 148

Objective review

Which of the following isn't a supported way to add an event handler to a DOM
element?

1.

Declaring within the HTML element by assigning the event attribute to a JavaScript
function

A.

Setting the attribute in CSS to a valid JavaScript function

B.

Dynamically through JavaScript by assigning a JavaScript function to the object's
event property

C.

Dynamically through JavaScript via the assign/remove event listener methods D.

Which of the following isn't an attribute of an anonymous function?
A. Anonymous functions can't be called by any other code.
B. Anonymous functions have a clearly defined name.

2.

Anonymous functions can be passed as parameters. C.

Anonymous functions can't be assigned to a DOM element declaratively. D.

Which code line would successfully cancel an event?
A. window.event.returnValue = false;
B. return false;
C. window.event.Return();
D. window.Stop();

3.

Which event occurs when a DOM element receives the cursor?
A. focus
B. change
C. keydown
D. mouseleave

4.

Which option provides the correct sequence of events in a drag-and-drop operation?
A. dragstart , drag , dragenter , drop
B. dragstart , drag , dragenter , dragstop
C. drag , dragstart , drop , dragenter
D. drag , dragstart , dragenter , dragstop

5.