A(n) ________ is a control that performs an action or sequence of actions when it is clicked

Which type of file suffix is used by both Windows 10 and the CentOS 7 GNOME desktop to identify file associations?

A. modifiers B. extensions C. sources D. attributes

The set of an object's methods available to users is called its ____________________.

Fill in the blank(s) with the appropriate word(s).