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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.
A storage tank has a container to keep a certain amount of fuel and it also has an indicator to inform about the level of fuel inside the container. The container cannot exceed
Define Brooks law. Software was delivered late, was defective, cost several times the original estimates and often showed poor performance characteristics.
Q. Explain Span and average span size of a program? Span dimension indicates the number of statements that pass between successive uses of a variable. For illustration in the f
Word Processing Software: Word processing is one of the most wide spread applications software types in use today. Developed as a successor to primitive text-editors that re o
1. Perform a requirements analysis for the Case Study. Express the results using the following artefacts: a. A use case diagram for the functional requirements of the entire
"User documentation" is a document that explains the way a software product or system should be used to get the desired results.
What is security testing? Security testing attempts to determine that protection mechanism built into a system will protect it from improper penetration.
Explain the term - Code Complete - Phase of development where functionality is implemented completely with only bug fixes remaining. - All functions from functional specific
Software
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
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