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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 critical design review The purpose of critical design review is to make sure that the detailed design satisfies the specifications laid down during system design. The
Define process maturity. In recent years there has been a important emphasis on process maturity. The Software Engineering Institute. (SEI) has developed a comprehensive model
Q. Explain Equivalence Class Partitioning ? Equivalence Class Partitioning : It is a method in black box testing. It is designed to reduce the number of test cases by dividing
Explain the Test Specification and Test Suite: - This is a document verifying the test approach for a software feature or combination or features and the inputs, predicted resu
State Lehman's First law. A program that is used in true world environment essentially must change or become progressively less useful in that environment.
A strategy for software testing integrates software test case design methods into a well - planned series of steps that result in the successful construction of software. Common
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Text Retrieval Packages: Text retrieval comprises storage and subsequent retrieval of rat girds, essentially textual rather than numerical, tabular or graphical. Although, eac
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What is Integration testing: - This test is performed to determine the interfaces among system components, interactions between the application and the hardware, file system, a
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