________ are used to signal errors or unexpected events that occur while a program is running.

You cannot connect a hub to another hub unless it has an uplink port.

Answer the following statement true (T) or false (F)

Constructors:

a. Initialize instance variables. b. When overloaded, can have identical argument lists. c. When overloaded, are selected by number, types and order of types of parameters. d. Both (a) and (c).