29. Why is it better to use a biometric control along with an access key?
a. It provides a preventive control.
b. It provides a detective control.
c. It provides a corrective control.
d. It provides a two-factor control.
29. d. Biometrics and access keys are two separate controls, providing a two-factor authentication. When they are combined in a session, they provide a synergistic or combination control. The total effect is greater than the single control alone.
30. Which of the following is ineffective in extinguishing Class A and B fires in a building?
a. Carbon dioxide
b. Water fog
c. Dry powder
d. Dry chemical
30. c. Dry powder is effective against Class D fires and ineffective against Class A and B fires. The other three choices are effective against Class A and B fires. Water fog is created by a special nozzle on the water hose.
31. Which one of the following power problems is unlike the others?
a. Sags
b. Spikes
c. Blackouts
d. Surges
31. c. A blackout is a total loss of power, lasting several minutes to several hours, caused by damage to power lines and equipment, commonly due to weather conditions. Sags create under-voltage conditions. Spikes and surges create over-voltage conditions.
32. In a fire-extinguishing environment, what is a dry pipe?
a. A sprinkler system in which the water does not enter the pipes until the automatic sensor indicates that there is a fire in the area
b. A sprinkler system in which the water is in the pipe, but the outside of the pipe is dry
c. A Halon gas system that contains a dry pipe
d. A carbon dioxide (CO2) gas system that has a dry chemical to extinguish a fire
32. a. The sequence of dry-pipe actions is (i) a heat or smoke sensor is activated first, (ii) water fills the previously empty pipes leading to the sprinklers, (iii) the alarm is sounded, and (iv) the electrical power supply is disconnected automatically. The choice “A sprinkler system in which the water is in the pipe, but the outside of the pipe is dry” is incorrect because water is not in the pipe until the heat or smoke sensor is activated. The choice “A Halon gas system that contains a dry pipe” and the choice “A carbon dioxide (CO2) gas system that has a dry chemical to extinguish a fire” are incorrect because the descriptions are meaningless.
33. In most cases, what can take the heat off the fire safely?
a. Water
b. Carbon dioxide
c. Soda ash
d. Halon gas
33. a. Water takes the heat off the fire, and it is safe compared to the other choices. Carbon dioxide, soda ash, and Halon can be injurious.
34. What is an under-voltage in electric power called?
a. Brownout
b. Blackout
c. Burnout
d. Dropout
34. a. A brownout is a condition in which electrical power dips below normal for more than a few seconds and is caused by under-voltage. Brownouts are a result of a load near to or equaling generating capacity. A blackout is a complete loss of electrical power (that is, actual failure). Blackouts can result from windstorms, floods, failures of electronic system equipment, or human error. A dropout is an area on a disk or tape that cannot effectively record data. Persistent brownouts can cause data corruption and loss and can also cause computer power supplies to overheat and burn out.
35. Which of the following fire types is most common?
a. Furniture fires
b. Electrical fires
c. Paper fires
d. Gasoline fires
35. b. Statistics indicate that most fires are electrical in origin. Furniture fires and paper fires are Class A fires, whereas gasoline fires are Class B fires.
36. Electronic surveillance and wiretapping has increased due to which of the following?
a. Telephone lines
b. Bugging techniques
c. Microchip technology
d. Surveillance equipment
36. c. Miniaturization has greatly aided spying. With advances in microchip technology, transmitters can be so small as to be enmeshed in wallpaper, inserted under a stamp, or placed on the head of a nail.
37. The failure of a sprinkler system most often is due to which of the following reasons?
a. Equipment error
b. Computer error
c. Human error
d. Design error
37. c. The failure of a sprinkler system most often is due to human error—the water supply was turned off at the time of the fire.
38. When freezing temperatures and broken pipes are a problem, which of the following should be used?
a. Wet-pipe system
b. Dry-pipe system
c. Carbon-dioxide system
d. Halon system
38. b. When freezing temperatures and broken pipes are a problem, the dry-pipe system is useful. Air pressure is maintained in the pipes until a sprinkler head ruptures. Then, the air escapes, and water enters the pipes and exits through the opened sprinklers. With the wet-pipe system, water is in the pipes at all times and is released when heat ruptures the seal in the sprinkler head.
39. Which of the following cannot defend the computing environment?
a. Operating systems
b. Biometrics
c. Cryptographic key recovery
d. Hardware tokens
39. c. Operating systems, biometrics, and hardware tokens, either alone or together, can defend the computing environment. The cryptographic key recovery is a part of key management infrastructure/public key infrastructure (KMI/PKI), which is a supporting infrastructure for information assurance. The cryptographic key recovery by itself cannot defend the computing environment.
40. Information leakage occurs due to which of the following physical and environmental hazards?
a. Flooding
b. Electromagnetic radiation
c. Vandalism
d. Electrical interference
40. b. An organization should protect the information system from information leakage due to electromagnetic signal emanations. All the other choices are examples of hazards but not related to an information leakage problem.
41. Which of the following is a direct physical measure used to protect the integrity and confidentiality of transmitted information?