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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 does Validation represent? Validation shows the set of activities that ensure that the software that has been built is satisfying the customer needs.
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INMAGIC Plus: INMAGIC Plus is a microcomputer- based software package designed to build, maintain and use textual databases including bibliographic databases. As a generalised
What is Coupling? Coupling is the measure of interconnection among modules in a program structure. It depends on the interface complexity among modules.
Explain the reuse maintenance model with the help of a diagram. Reuse maintenance model: This model is based on the principal that maintenance could be viewed as an activity i
Define metrics. Metrics is explained as the degree to which a system component, or process possesses a given attribute.
Ask question what is abstraction ?#Minimum 100 words accepted#
What is Benchmark? Ans) A Benchmark is a standard to calculate against.
What is Upward compression? Ans) In software design, "upward compression" means a type of demodularization in which a subordinate module is copied into the body of a better modu
Define maintenance. Maintenance is defined as the procedure in which changes are executed by either modifying the existing system's architecture or by adding new mechanism to t
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