What is a piece of malicious software that gets passed from computer to computer by attaching itself to a program?

If there were a red X in the area indicated by the line in the accompanying figure, it would mean that the ____________________ is inactive.

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

Give a brief answer to each of the following questions:

a) Why does this text discuss structured programming in addition to object-oriented programming? b) What kinds of messages do people send to one another? c) Objects send messages to one another across well-defined interfaces. What interfaces does a car radio (object) present to its user (a person object)?