Which of the following malware types may require user interaction, does not hide itself, and is commonly
identified by marketing pop-ups based on browsing habits?

A.
Botnet

B.
Rootkit

C.
Adware

D.
Virus

Explanation:
Adware is free software that is supported by advertisements. Common adware programs are toolbars,
games and utilities. They are free to use, but require you to watch advertisements as long as the
programs are open. Adware typically requires an active Internet connection to run.
Incorrect Answers:
A: A botnet is a collection of Internet-connected programs communicating with other similar programs in
order to perform tasks. This can be as mundane as keeping control of an Internet Relay Chat (IRC)
channel, or it could be used to send spam email or participate in distributed denial-of-service attacks. A
botnet does hide itself, but is not commonly identified by marketing popups.
B: A rootkit is a stealthy type of software, typically malicious, designed to hide the existence of certain
processes or programs from normal methods of detection and enable continued privileged access to a
computer. A rootkit does hide itself, but is not commonly identified by marketing popups.D: A computer virus is a program or piece of code that is loaded onto your computer without your
knowledge and runs against your wishes. Viruses can also replicate themselves. All computer viruses are
man-made. A simple virus that can make a copy of itself over and over again is relatively easy to produce.
Even such a simple virus is dangerous because it will quickly use all available memory and bring the
system to a halt. An even more dangerous type of virus is one capable of transmitting itself across
networks and bypassing security systems. A virus does hide itself, but is not commonly identified by
marketing popups.

http://techterms.com/definition/adware
http://en.wikipedia.org/wiki/Botnet
http://www.webopedia.com/TERM/V/virus.html