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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.
NATURE AND TYPES OF SOFTARE PACKAGES: Software packages are commercially supplied products which typically provide solutions to a particular range of software development or a
role of srs
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Alpha testing and Beta testing Alpha testing is conducting acceptance testing in the environment where the application was formed. It is done by the customer. Beta testing is c
Distinguish between alpha and beta testing. Alpha and beta testing are the types of acceptance testing. Alpha test: The alpha testing is attesting in which the version o
QUESTION 1 (a) Suggest how the atomicity of EV1 "Request for estimate" could be improved (b) Document any five events listed above (Tip: state the actor, system agent, input
Determine the Software development models Software Engineering deals with development of software. Thus, understanding the basic characteristics of software is essential. Softw
The "user guide" is the similar as the user manual. The user guide is a document that shows information essential to employ a system or component to get the desired results. Typica
Q. Consider a program which computes the square root of an input integer between 0 and 5000. Determine the equivalence class test cases. Determine the test cases using boundary val
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