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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.
Write definition of state transition diagram? State transition diagram is mainly a collection of states and events. Due to the events the system has to change its state. It als
Question: (a) Name two agent-oriented programming languages. (b) Distinguish between communication protocols and interaction protocols for agent systems. Give two example
When to Re-Engineer? When the system alter are mostly confined to part of the system then re-engineer that part. When hardware or software support becomes obsolete.
How many types of software organization? Explain each organization style with a suitable example? What are the factors that influence the group? Write short notes on the stak
Distinguish software faults and software failures Ans: In case of a failure, the software does not do what the user expects. A fault is a programming error that may or may not
Define Data objects, attributes & relationship. Data object: Representation of any collective information that must be understood by software. It can be any external entity.
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Hybrid design: Pure top-down or pure bottom up approaches are often not practical thus hybrid approach which combines the above two approaches is often used.
Level 3 (Defined) The organisation satisfies all the requirements of level-2. Atthis maturity level, the softwaredevelopmentprocesses arewell defined, managed and documented
Q. Explain the cost drivers and EAF of the intermediate COCOMO model? Ans. There are 15 different attributes described as cost drivers' attributes that determine the multiply
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