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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 the Structured Requirements Definition Structured Requirements definition is an approach to perform study about complete system and its various sub-systems, external ou
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Q. Define Software testability? Software testability is the degree to which a software artifact (i.e. a software system, software module, requirements- or design document) su
which paradigm tend to correspond with top down and bottom up design
What is Relationship Entities are associated to each other by relationships. It denotes how two entities are associated. A diamond notation with name of relationship signifi
In well-run projects, the mission of the test team is not merely to perform testing, but to help decrease the risk of product failure. Testers look for manifest problems in the pro
Describe the prototyping methods in software process. Two methods i. Evolutionary prototyping - In this approach of system development, the early prototype is prepared and i
Fan in/Fan-out :- Fan-in is a measure of the number of process or functions that call some other function or process (say X). Fan-out is the number of functions that are known
What is the purpose of timeline chart? The purpose of the timeline chart is to highlight the scope of the individual task. Hence set of tasks are given as input to the timeline
Explain the Instruction pipelines Instruction pipelines: - An instructin pipeline reads consecutive instructions from memory whereas previous instructions are being implemented
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