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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.
Define black box testing strategy. Black box testing describes the functional requirements of the software. Test cases are determined on the basis of the requirements or specif
? A store is in the business of selling paints and hardware items. A number of reputed companies supply items to the store. New suppliers can also register with the store after pro
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Load testing is testing an application under heavy loads, like the testing of a web site under a range of loads to verify at what point the system response time will degrade or fai
Question: (a) Explain what is meant by Dimensional Modeling as used in Business Intelligence (BI) solutions. (b) There has been a request from the Managing Director of an In
I need help creating a DFD for an assignment. Is there anyway you could help?
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Question This question refers to the database Schema. Express the following queries in SQL: (a) List the First Name, Last Name and telephone number of all employees who wer
what is ethics frameworks
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