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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.
Test Case A test case is a unit level document describing the inputs, steps of implementation and the expected result of each test condition for each requirement from the BRD.
What is Quality assurance and standards? Standards are the key to efficient quality management. They may be international, national, and organizational or project standards.
What does Level0 DFD represent? Level0 DFD is known as 'fundamental system model' or 'context model'. In the context model the entire software system is shown by a single bubb
Objectives of Data dictionaries:- 1) A standard definition of all terms in a system, that is every item of data is uniquely identified and described. 2) Easy cross-referen
Evolutionary prototyping Objective: The principal objective of this model is to deliver the working system to the end-user. Example-AI systems. Advantages
How do we zero down on automation tools for regression testing? Below criteria are used when zeroing down on automation tools for regression testing: - Risk analysis such as
Explain CASE ?
Define Verification ?
What is the purpose of timeline chart? The purpose of the timeline chart is to highlight the scope of the individual task. Hence set of tasks are given as input to the timeline
1) An environment that having the integral hardware, instrumentation, simulators, software tools, and other support elements required to conduct a test of a logically or physically
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