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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.
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effects of nativity in requirements specification
A Software Requirements Specification (SRS) is a complete description of the behavior of the system to be developed. It includes a set of use cases, describing the interactions
You are preparing a bid for a refinery control system for Australian Petroleum Ltd (APL) using the CoCoMo 81 estimation model. You are familiar with industrial control system softw
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What is a user friendly document? Ans) A document is user friendly, when it is designed and written with simple of use, as single of the primary objectives of its design.
Explain the persistent class maps to one relational table In most of cases, persistent class maps to one relational table (keeping aside inheritance issue, for the moment). In
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