5) Which of the following is/are the most common organizational business information system(s)?

A. decision support systems

B. transaction processing systems

C. electronic commerce systems

D. management information systems

E. None of the above.

6) Which of the following statement is/are FALSE?

A. The events of breaking the security mechanism of a computer network are called hacking. The person who hacks is called a hacker.

B. Besides hacking, we also use the term "routing" to describe those activities that may cause damages to computers and networks, or cause some kinds of loss to a user.

C. Spyware is a software which can collect users information (e.g. internet surfing habits, personal information, bank account, etc.), and send to another entity without their consent.

D. Denial of Service (DoS) is an attempt to make an online service unavailable by overwhelming it with traffic from multiple sources, so that the server cannot handle normal users requests.

E. None of the above.

7) To prevent malware attacks, what type of software should be installed on a personal computer?

A. printer driver

B. communication software

C. antivirus software

D. operating system

E. None of the above.