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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.
Q. What are dynamic testing tools? Explain the functions that they must support. Ans. Dynamic testing tools: 1: coverage analyzers (execution verifiers): A coverage anal
identification need
Illustrate parameterization in QTP. - Parameterization - Passing values from external source into script. - The number of values passed can be single or multiple. - It he
1) Case Analysis (maximum of 6 pages per case, double spaced) The following format may be used as a guideline for Case Analysis: Key Issues Identified in Case Sta
What are the advantages and disadvantages of big-bang? Advantages: This approach is simple. Disadvantages: It is hard to debug. It is difficult to isolate errors while testi
What is Heuristics Testing? Ans) Heuristics Testing is the failure-directed testing.
Explain Respiratory quotient? Ans) Respiratory quotient is the ratio among the carbon-dioxide used in photosynthesis to the quantity of oxygen liberated in respiration.
finds the c++ of resistance in series and parallel
Q. Explain the concept of Top down design? Top down design: A top down design approach begins by identifying the major modules of the system decomposing them into their lower
Q. Explain Equivalence Class Partitioning ? Equivalence Class Partitioning : It is a method in black box testing. It is designed to reduce the number of test cases by dividing
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