Fourth-generation computers used ________

A ____________ is a program that runs in the background and provides support for other processes.

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

Which of the following is false?

a. A JPasswordField shows that characters are being entered, but hides the actual character with an echo character. b. Class JTextField extends JTextComponent; Class JPasswordField extends JTextField. c. Both JTextFields and JPasswordFields are single-line areas in which the user can enter text via the keyboard. d. JPasswordFields generate events; JTextFields do not.