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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.
Define the Behavioural Model It defines operational behaviour of the system. In this model, numerous operations of the system are represented in pictorial form. Tools used to
What is the difference between module coupling and module collection? Cohesion is the property of a one module and can be defined as glue that keeps the data elements within a
Q. What is Test data generators? This is a difficult one as well as at least for the present is one for which no general solution exists. One of the practical problems with te
Q. Explain Span and average span size of a program? Span dimension indicates the number of statements that pass between successive uses of a variable. For illustration in the f
Explain Error guessing? Ans) Test data selection method. The selection criterion is to pick values that seem likely to reason errors.
design constraints in an electronic voting system
Question 1 Explain the origin of the defect distribution in a typical software development life cycle Question 2 Explain the concept of quality Question 3 Explain the contents
The term "performance testing" is usually used synonymously with stress testing, load testing, reliability testing, and volume testing. It is a part of system testing, but it's als
What is Review? Ans) A method or meeting during which a work product or set of work products, is shown to project personnel, managers, users, customers, or other interested part
Explain about the software testing strategies. A method approach to software testing. Verification and Validation. Verification refers to the set of activities that ma
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