A type of array in which different rows can have different number of columns is called a/an:

Instance variables declared final do not or cannot:

a. Cause syntax errors if used as a left-hand value. b. Be initialized. c. Be modified after they are initialized. d. None of the above.

The four layers of the TCP/IP protocol stack, in order from highest to lowest, are __________, __________, __________ and __________.

a) application, transport, network, link b) application, network, transport, link c) network, link, application, transport d) link, transport, application, network