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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.
What is meant by software change? Software change is termed as the change in nature of software as the requirements of software changes.
Well establish garment factory (large scale- one of country biggest) received order of 40,000 fabric to complete within 12 weeks. (This is well profitable order which cannot be ign
Explain incremental model? The incremental model is proposed by D.L PARNAS. It is basically executed by combining elements of linear sequential model and iterative prototyping
What is a state transition diagram? State transition diagram is basically a collection of states and events. The events cause the system to change its state. It also show what
vi curve
how was transform mapping like?
What are the types of Software system requirements? Functional requirements: Services the system should give. Non-functional requirements: Constraints on the services.
data dictionary on library management system
What is Software? Software is nothing but a collection of computer programs that are related documents that are indented to give desired features, functionalities and improved
What is Non-intrusive Testing? Testing that is transparent to the software under test; i.e., testing that does not alter the timing or processing characteristics of the software
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