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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.
Construct an E-R diagram for a department store database. This database contains information about customers, items they order, departments in the store, employees, and suppliers o
How can you create a file named -i? Which techniques do not work, and why do they not work? How can you remove the file named -i?
What is software testing?
What does modality in data modeling indicates? Modality shows whether or not a particular data object must participate in the relationship.
Write short note on black box testing. The black box testing is also known as behavioural testing. This method fully focuses on the functional needs of the software. Tests are
Software Engineering 1. Discuss the Limitation of linear sequential model in software engineering. 2. Explain Software reliability? Why reliability is more important than ef
What is verification? Verification is the process of determining whether the output of single phase of software development conforms to that of its last phase, whereas vali
Testing conducted to evaluate whether systems or components pass data and control correctly to one another. Contrast with testing, unit; testing, system. Normal 0
What are the proper testing strategy It is necessary to develop a proper testing strategy to ensure all possible scenarios are covered and that all error trapping techniques ar
Q. What is stepwise refinement? Stepwise Refinement:-Stepwise Refinement is a top-down design strategy initially proposed by Niklaus Wirth. A program is developed by consecutiv
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