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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.
Explain Software Bug? Ans) A fault in a program which origins the program to perform in an unintended or unanticipated manner.
algorithums
A testing technique using input values at, just below, and just above, the definite limits of an input domain; and with input values causing outputs to be at, just below, and just
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Q. For the structural chart given in fig.1 calculate the Information Flow index of individual modules as well as whole software. Total information flow = IF (main) + IF (A
What are the various types of traceability in software engineering? i. Source traceability - These are basically the links from requirement to stakeholders who propose these
Behavioral Analysis Model The Behavioral analysis is an operational technique for all requirement analysis techniques. When a sensor event is recognized the software invokes
Problem: (a) Draw an Entity Relationship Diagram for the given case study. Show entities and relationships on the diagram (attributes should not be shown). Cardinality and op
Illustrate the method of User documentation This usually comprises: - How to load/run the software - How to do a search - How to save files - How to do pri
Differentiate between functional testing and structural testing. Functional testing also known as behavioural testing or Black box testing. In this methods, tester design te
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