Dependability properties

There are five principal dimensions to dependability, which are availability, reliability, safety, and security

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Views #: 52
Questions #: 9
Time: 10 minutes
Pass Score: 80.0%
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The dependability of a computer system is a property of the system that reflects its _________

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Explanation

Match the properties of dependability to their definitions

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Description
×A judgment of how likely it is that the system will cause damage to people or its environment
×A judgment of how likely it is that the system can resist accidental or deliberate intrusions
×The probability, over a given period of time, that the system will correctly deliver services as expected by the user
×The probability that it will be up and running and able to deliver useful services to users at any given time
×A judgment of how well that system can maintain the continuity of its critical services in the presence of disruptive events
Availability
Reliability
Safety
Security
Resilience

There are five principal dimesions to dependability (availability, reliability, safety, security, and resilience). Match them to their definitions

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Explanation

Choose the right sub-properties

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A security property can be further broken down into sub-properties.  Choose the ones that can feed-in the security property.

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Explanation

Choose the right sub-properties

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A reliability property can be further broken down into sub-properties.  Choose the ones that can feed-in the reliability property.

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In an insulin pump system, what are the most critical dependable properties?

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What are the most critical dependablity properties in a wilderness weather system?

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For example, a weather system installed in a jungle 
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Explanation

Match the properties to their definitions

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Property

Repairability
Maintainability
Error tolerance

Definition

It is how quick a system can be restored to its normal execution after failure
It is the ability of the system to detect all possible errors and either fix them or ask use to fix them
It is the software that can be adopted economically to cope with new requirements where there is a low probability of introducing new errors

There are three properties which are closely related to the dependability properties (repairability, maintainability, and error tolerance).  Match these properties to their defintions:

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Explanation

Developing a dependable software

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To develop dependable software, you therefore need to ensure that:

  1. You avoid the introduction of (1) into the system during software specification and development.
  2. You design (2) that are effective in discovering residual errors that affect the dependability of the system.
  3. You design the system to be (3) so that it can continue working when things go wrong.
  4. You design (4) that guard against external attacks that can compromise the availability or security of the system.
  5. You (5) the deployed system and its supporting software for its operating environment.
  6. You include system capabilities to recognize (6) and to resist these attacks.
  7. You design systems so that they can quickly (7) from system failures and cyberattacks without the loss of critical data.
Please drag and drop the selected option in the right place or type it instead
recover
fault tolerant
correctly configure
external cyberattacks
accidental errors
protection mechanisms
verification and validation processes
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Explanation

Building dependable systems is expensive

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Explanation

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Keywords
Undergraduate Year 11 Year 12