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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 are the Tools of environmental model (i) Statement of purpose: It indicates basic objectives of system. (ii) Event list: It describes different events of system
Explain in detail about the software process. It is explained as the structured set of activities that are required to develop the software system. Fundamental activ
Q. Explain about Function count? Function count:- It measures the functionality from the user point of view that is on the basis of what the user requests and receives in ret
Describe about the Environmental model It indicates environment in which system exists. Any small or big system is a sub-system of a larger system. For illustration, if softw
Comparison testing is testing that evaluate software weaknesses and strengths to those of competitors' products.
1. "Variable trace" is a (computer) record of the names and the values of variables accessed and/or changed during the implementation of a computer program. 2. "Value trace" is
Discuss spiral model for software life cycle SPIRAL MODEL The spiral model is classified into number of frame works. These frameworks are represented by task regions.
Ask question what is abstraction ?#Minimum 100 words accepted#
Q. Differentiate between failures and faults? Ans. Failure: -Failure is the disappearance of external results of program operation from requirements. Consequently failure is
QUESTION (a) Compare and contrast between Project logic evaluation (PLE), Networking and Scheduling (b) Discuss how the true cost of defects can often be higher than the ini
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