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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.
Describe how to perform Risk Analysis during software testing. Whereas a test plan is being formed, risks involved in testing the product are to be taken into consideration al
Define the computer based system. The computer based system can be explained as "a set or an arrangement of elements that are organized to accomplish some predefined goal by pr
Define about the erroneous data - Test data Abnormal/erroneous data - This is data outside the limits of validity/acceptability and must cause an error message to be g
risks and types of software risks
Define the meaning of Code Inspection - A formal testing technique where programmer reviews source code with a group who ask questions analyzing program logic, analyzing code
Define the Level 1 of maturity model At this maturitylevel,software is developed an ad hoc basis and nonstrategic technique is used for its development. Success of developed s
How will an engineer assess the safety? The risks linked to a project or product must be identified. The purposes of the project or product must be identified and ranked in im
Functional testing is black-box type of testing geared to functional needs of an application. Test engineers *should* do functional testing.
This is a explanation of whether or not certain processing conditions use many storage [memory] than estimated.
State about the Software Requirements Specification This document is produced as output of requirement analysis. Requirement analysis involves obtaining a clear and thorough
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