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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.
Class A class is a template that states the properties of objects. Classes have an interface which having of the operation, a body which executes the operations and instance va
Software Engineering A high technology system encompasses a number of elements like people, hardware, software, database, documentation, and process. System engineering
Explain various Object Oriented concepts used in Software Engineering. The concepts of Object Oriented concepts used in Softwar Engineering: Object Class:- Enc
What is a user interface Ans) "User interface" is the interface among a human user and a computer system. It access the passage of information among a human user and hardware or
In well-run projects, the mission of the test team is not merely to perform testing, but to help decrease the risk of product failure. Testers look for manifest problems in the pro
Q. A supermarket requires to develop software to encourage regular customers. For this the customer requires to supply his name address telephone number and driving license number.
1. Perform a requirements analysis for the Case Study. Express the results using the following artefacts: a. A use case diagram for the functional requirements of the entire
What is the benefit of modular design? Changes made during testing and maintenance becomes manageable and they do not influence other modules.
What does Data abstraction contains? A Data abstraction is a named collection of data that defines a data object Eg: door Attributes: door type, Opening mechanism, Swing di
Key process areas of Capability Maturity model (CMM) Effectiveness, Predictability and control of an organization's software processes are believed to get better as the organiz
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