A (an) _________ is a programming function that models the characteristic of abstract or real "objects" using classes.
Which if any of the following enables you to access a child window from the parent window using an object reference?
A ____________ is an input object in the shape of a small square that can be selected, or checked on or off.
This object can determine the brand and version of the browser in use, as well as the user’s operating system.