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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.
explain levels of transparency
Q. Explain Logarithmic Poisson Execution Time Model? This model is as well developed by Musa et Al (MUSA79). The breakdown intensity function is different here as compared to B
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Provide an abstract superclass called EnergyRecord and subclasses called Contract and Transaction with default constructors (no-arg) and full-arg, overloaded constructors. Collect
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Q. Design black box test suits for a function that checks whether a character or string upto ten characters in a palindrome? Ans Following may be the test cases: - Try wit
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