Software Engineering

Dependability and Security

Question 1
Marks : +2 | -2
Pass Ratio : 100%
A weakness in a computer-based system that may be exploited to cause loss or harm is known as?
Vulnerability
Attack
Threat
Exposure
Explanation:
None.
Question 2
Marks : +2 | -2
Pass Ratio : 100%
An assessment of the worst possible damage that could result from a particular hazard is known as
Risk
Hazard probability
Hazard severity
Mishap
Explanation:
Hazard severity can range from catastrophic, where many people are killed, to minor, where only minor damage results. When an individual death is a possibility, a reasonable assessment of hazard severity is ‘very high’.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
A characteristic of a software system that can lead to a system error is known as?
Human error or mistake
System fault
System error
System failure
Explanation:
None.
Question 4
Marks : +2 | -2
Pass Ratio : 100%
which of the following terms is a measure of the probability that the system will cause an accident?
Risk
Hazard probability
Accident
Damage
Explanation:
The risk is assessed by considering the hazard probability, the hazard severity, and the probability that the hazard will lead to an accident.
Question 5
Marks : +2 | -2
Pass Ratio : 100%
A chemical plant system may detect excessive pressure and open a relief valve to reduce these pressures before an explosion occurs. What kind of dependability and security issue the example states?
Hazard avoidance
Damage limitation
Hazard detection
Hazard detection and removal
Explanation:
The system is designed so that hazards are detected and removed before they result in an accident.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
An erroneous system state that can lead to system behavior that is unexpected by system users is known as?
Human error or mistake
System fault
System error
System failure
Explanation:
None.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
A password checking system that disallows user passwords that are proper names or words that are normally included in a dictionary is an example of ___________ with respect to security systems.
risk
asset
attack
Explanation:
A control protective measure that reduces a system’s vulnerability.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
An aircraft engine normally includes automatic fire extinguishers.What kind of dependability and security issue the example states?
Hazard avoidance
Damage limitation
Hazard detection
Hazard detection and removal
Explanation:
The system may include protection features that minimize the damage that may result from an accident.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
An event that occurs at some point in time when the system does not deliver a service as expected by its users is called _____________
Human error or mistake
System fault
System error
System failure
Explanation:
None.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
The safety of a system is a system attribute that reflects the system’s ability to operate, normally or abnormally, without injury to people or damage to the environment.
True
False
Explanation:
None.