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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 is V- Diagram (model)? Ans) A diagram that imagine the order of testing activities and their corresponding phases of growth
What is Walkthrough? Ans) Usually, a step-by-step simulation of the implementation of a procedure, as when walking by code, line by line, with an imagined set of inputs. The wor
Why software change occurs? Software change happens because of the following reasons. New needs emerge when the software is used. The business environment changes. Errors need
1. An orderly development of testing in which software elements, hardware elements, or both are joined and tested, to check out their interactions, unless the entire system has bee
What is Failure-directed Testing Ans) Testing based on the information of the types of errors made in the earlier period that are likely for the system under test.
Write definition of ERD? Entity Relationship Diagram shows the graphical presentation of the object relationship pair. It is above all used in database applications.
Class diagram: A class diagram in the Unified Modelling Language (UML) is a type of static structure diagram that defines the structure of a system by showing the system's classes
WHAT IS TRANSFORM FLOW
What is Exception? Ans) An event that causes suspension of normal program implementation. Types contain addressing exception, operation exception, data exception, overflow excep
Q. Compute the McCobes cyclomatic complexity? (i) compute the McCobe's cyclomatic complexity (ii) Find out independent path Ans (i) Cyclomate complexity V (
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