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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.
Why testing is important with respect to software? A testing process focuses on logical internals of software ensuring that all statements have been tested and all are function
What are the various types of traceability in software engineering? i. Source traceability - These are basically the links from requirement to stakeholders who propose these
QUESTION (a) Explain why making some replica managers read-only may improve the performance of a gossip system. (b) In the gossip architecture, why does a replica manager ne
Problem: (a) Briefly explain the requirement capture methods. (c) Using examples, write short notes on the following: i) Aggregation ii) Composition iii) Generalisation
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
(1)The planned systematic activities essential to make sure that a component, module, or system conforms to established technical requirements. (2) All actions that are taken to
Overview You are a Systems Analyst working for Zeppelin Industries Inc. Many of the software projects your company attempts to deliver are failing or have already failed. The
Formal testing, usually conducted by the developer for the consumer, to demonstrate that the software meet its described requirements.
true/false small errors in syntax or spelling of a line of code will not affect the results
MICROCOMPUTER SOFTWARE PACKAGES: There are a number of possibilities for using microcomputers in libraries and centres. What the microcomputer can accomplish is limited by tw
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