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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.
Writing a report explaining all the work in detail in a professional manner and the report should include all the steps below: 1. Draw up a final Entity-Relationship model compr
What does Validation represent? Validation shows the set of activities that ensure that the software that has been built is satisfying the customer needs.
What happens when GUI maps are loaded? When a GUI map is loaded following things take place: - All object logical names, window information and physical descriptions gets lo
Top down design: A top down design approach begins by identifying the main modules of the system, decomposing them into their lower level modules and iterating unless the desired
Question 1: a) Describe the various activities and or processes related to the development of Information systems. b) Using a diagram, show the several development processes
Functional testing is black-box type of testing geared to functional needs of an application. Test engineers *should* do functional testing.
Question: You work with Mr Akshay Kapoor, Human Resource Manager of an IT Company called LTZ. Mr Kapoor is the Chairperson of the Human Resource Policy Committee. Other members
What is reverse engineering? It is a process of examining software with a view to understanding its design and specification. - In reverse engineering, source code and i
Open box testing is similar as white box testing. It's a testing approach that consider the application's program structure, and derives test cases from the application's program l
what is meant by phosphate conditiong
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