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ISACA Certified Information Systems Auditor Sample Questions (Q318-Q323):
NEW QUESTION # 318
Which of the following physical access controls effectively reduces the risk of piggybacking?
- A. Biometric door locks
- B. Combination door locks
- C. Deadman doors
- D. Bolting door locks
Answer: C
Explanation:
Deadman doors use a pair of doors. For the second door to operate, the first entry door must close and lock with only one person permitted in the holding areA . This effectively reduces the risk of piggybacking. An individual’s unique body features such as voice, retina, fingerprint or signature activate biometric door locks; however, they do not prevent or reduce the risk of piggybacking. Combination door locks, also known as cipher locks, use a numeric key pad or dial to gain entry. They do notprevent or reduce the risk of piggybacking since unauthorized individuals may still gain access to the processing center. Bolting door locks require the traditional metal key to gain entry. Unauthorized individuals could still gain access to the processing center along with an authorized individual.
NEW QUESTION # 319
Applying a digital signature to data traveling in a network provides:
- A. security andnonrepudiation.
- B. integrity andnonrepudiation.
- C. confidentiality and integrity.
- D. confidentiality andnonrepudiation.
Answer: B
Explanation:
The process of applying a mathematical algorithm to the data that travel in the network and placing the results of this operation with the hash data is used for controlling data integrity, since any unauthorized modification to this data would result in a different hash. The application of a digital signature would accomplish the non repudiation of the delivery of the message. The term security is a broad concept and not a specific one. In addition to a hash and a digital signature, confidentiality is applied when an encryption process exists.
NEW QUESTION # 320
A digital signature contains a message digest to:
- A. define the encryption algorithm.
- B. enable message transmission in a digital format.
- C. show if the message has been altered after transmission.
- D. confirm the identity of the originator.
Answer: C
Explanation:
Explanation/Reference:
Explanation:
The message digest is calculated and included in a digital signature to prove that the message has not been altered. It should be the same value as a recalculation performed upon receipt. It does not define the algorithm or enable the transmission in digital format and has no effect on the identity of the user; it is there to ensure integrity rather than identity.
NEW QUESTION # 321
A malicious code that changes itself with each file it infects is called a:
- A. stealth virus.
- B. trojan horse.
- C. polymorphic virus.
- D. logic bomb.
Answer: C
Explanation:
A polymorphic virus has the capability of changing its own code, enabling it to have many different
variants. Since they have no consistent binary pattern, such viruses are hard to identify.
Incorrect answers:
A. A logic bomb is code that is hidden in a program or system which will cause something to happen when the user performs a certain action or when certain conditions are met. A logic bomb, which can be downloaded along with a corrupted shareware or freeware program, may destroy data, violate system security, or erase the hard drive.
B. A stealth virus is a virus that hides itself by intercepting disk access requests. When an antivirus program tries to read files or boot sectors to find the virus, the stealth virus feeds the antivirus program a clean image of the file or boot sector.
C. A trojan horse is a virus program that appears to be useful and harmless but which has harmful side effects such as destroying data or breaking the security of the system on which it is run.
NEW QUESTION # 322
Web and e-mail filtering tools are PRIMARILY valuable to an organization because they:
- A. assist the organization in preventing legal issues
- B. maximize employee performance.
- C. protect the organization from viruses andnonbusiness materials.
- D. safeguard the organization’s image.
Answer: C
Explanation:
The main reason for investing in web and e-mail filtering tools is that they significantly reduce risks related to viruses, spam, mail chains, recreational surfing and recreational e-mail. Choice B could be true in some circumstances (i.e., it wouldneed to be implemented along with an awareness program, so that employee performance can be significantly improved). However, in such cases, it would not be as relevant as choice A.
Choices C and D are secondary or indirect benefits.
NEW QUESTION # 323
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