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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.
Question: (a) Differentiate between circuit switching and packet switching. (b) Using an example, explain the main parts that form a URL (Uniform Resource Locator). (c)
Define Requirement Engineering . Requirement Engineering is a process in which all of the activities required to maintain and create a system requirements document. The four
CAPABILITY MATURITY MODEL (CMM): CMM is a strategy for recovering the software process, irrespective of the actual life cycle model used.
Question 1 Give the classification of computers and explain them briefly Question 2 Give the overview of application software Question 3 Explain the three main types of
OO system testing is actually identical to its counterpart in the procedural environment.
What is the Key Process Areas SEI has associated key process areas(KPAs) with every maturity level. KPA is an indicative measurement of goodness of software engineering functi
What are the benefits of automation testing? Following are the benefits of automation testing: 1) Enables Quick Release - With automatically run regression tests, you can
Provide an abstract superclass called EnergyRecord and subclasses called Contract and Transaction with default constructors (no-arg) and full-arg, overloaded constructors. Collect
system development life cycle security
Define Brooks law. Software was delivered late, was not reliable, cost various times the original estimates and often exhibited poor performance characteristics.
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