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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.
Distinguish between verification and validation. Verification refers to the set of activities that make sure that software correctly executes a specific function. Validation re
m2+m3+m5+m7+m12+m8+m9 simplify using k-map
What is Software metric? Any type of measurement which relate to a software system, process or related documentation Lines of code in a program, the Fog index, number of
Asynchronous control
benefits and limitations mysql
Mention some of the factors to be considered during System Modeling. Simplifications Assumptions Constraints
Iterative Enhancement Model Iterative Enhancement Model: This model has the similar phases as the waterfall model, but with fewer restrictions. Normally the phases happen in th
What is Constant? In software or software testing, a constant is a meaningful name that shown a number, or string, that does not alter. Constants are variables that remain the s
Question: (a) What is a piconet in a Bluetooth context? (b) Discuss the concept of Master, slave, stand-by and parked devices with respect to a Bluetooth piconet. (c)
Define software scope. The first software project management activity is the determination of software scope. Scope is defined answering the following questions. Context: Wh
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