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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 architectural transformation? This is a more radical approach to software change then maintenance as it involves making significant changes to the architecture of the s
Q. Consider the program given below void main() { int i,j,k; readln (i,j,k); if( (i k) ) { writeln("then part"); if (j writeln ("j
Q. Explain about Software Risks - Dependencies? Dependencies: -Many risks arise because of dependencies of project on outside agencies or factors. It isn't easy to control thes
The important issues that a SRS must address are: (a) System goals and requirements are different (b) Request Definition (c) Request Specification (d) Software Specif
schema tools
What is Path Coverage Testing? Ans) A test process satisfying coverage criteria that every logical path by the program is tested. Paths through the program often are grouped int
structured analysis
To develop software of lasting quality you have to lay down a solid architectural foundation that is resilient to change. Modelling is at the heart of the development of good quali
Define coupling and Discuss various types of coupling? Define coupling. Discuss various types of coupling. Ans: A Coupling is the measure of the degree of interdepende
Testing to satisfy the criterion that every statement in a program be implemented at least once during program testing.
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