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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.
Describe the functional requirement for a Library management system ?
A selection method in which test data are chosen to lie along "boundaries" of the input domain [or output range] classes, data structures, procedure parameters, etc. Choices often
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Q. Disadvantage of lines of code? 1. Lack of Accountability: Lines of code measure suffers from some fundamental problems. A few think it isn't useful to measure the productivi
Distinguish between verification and validation. Verification is the set of activities that ensure that software properly implements a specific function. Validation is a differ
A newsagent shop employs several newspaper deliverers to hand-deliver the morning newspapers to customers' houses. The customers all live fairly close to the shop and the delivere
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) (i) What are the main components of the Network Switching Subsystem in GSM? (ii) What are the main functions of the Network Switching Subsystem? (b) What
Problem : (a) What does a UseCase Diagram represent? (b) Draw a UseCase Diagram for the above case study. (c) For any one use case give a detail use case specification.
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