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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.
Demonstrate the symbol used in data dictionary A number of the symbols used in data dictionary are as following: X= [a/b] x comprises eithe
how many people work in your hotel?
Q. Explain Logarithmic Poisson Execution Time Model? This model is as well developed by Musa et Al (MUSA79). The breakdown intensity function is different here as compared to B
Explain about the incremental model. Have same phases as the waterfall model. Phases are Analysis. Design. Code. Test. Incremental model deliver
What is prototyping approaches in software process? i. Evolutionary prototyping - In this approach of system development, the initial prototype is prepared and it is then refin
What are the approaches of integration testing? The integration testing can be carried out using two approaches. 1. The non-incremental testing. 2. Incremental testing.
notation of requirement of specification
explain the goal oriented requirement elicitation process with a neat sketch
What is architectural transformation? This is a more radical approach to software change then maintenance as it involves making significant changes to the architecture of the s
What are the elements of Analysis model? i. Data Dictionary ii. Data Flow Diagram iii. Entity Relationship Diagram iv. State Transition Diagram v. Process specifica
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