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QUESTION - Fault Tolerance
(a) Three computers together provide a replicated service. The manufacturers claim that each computer has a mean time between failure of five days; a failure typically takes four hours to fix. What is the availability of the replicated service?
(b) In the gossip architecture, why does a replica manager need to keep both a ‘replica' timestamp and a ‘value' timestamp?
(c) Explain the difference between linearizability and sequential consistency, and why the latter is more practical to implement, in general.
(d) Explain why allowing backups to process read operations leads to sequentially consistent rather than linearizable executions in a passive replication system.
What are the advantages of Software maintenance Software maintenance is a very broad activity which includes error correction, deletion of obsolete capabilities, enhancement of
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Different characteristics of software measures Different characteristics of software measures identified by Basili (1989) are given below: • Objects of measurement: They i
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Why decision tables are used in many cases instead of boundary value and equivalence partitioning analysis? - A decision table is an efficient way to deal with combinations of
After users are authenticated, what measures can be employed in order to maintain security when users are away from their computers? 2. Discuss ways in which the use of strong au
QUESTION (a) Draw a use case diagram (UCD) for the given case study. For any one use case give a detail use case specification (b) Describe the different phases and workflow
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what is software process model and waterfall model?
What is Procedure? Ans) The step-by-step method followed to make sure that standards are met.
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