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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.
Q. What are the Debugging programs? Debugging programs:-A program which runs simultaneously with the program under test and provides commands to examine memory and registers st
Define Traceability Traceability is the overall property of requirements specification which reflects the easiness of finding related requirements. Three different parts
Differentiate between structured analysis and structured design. The aim of structured analysis is to transform the textual explanation of a problem into a graphic model. Duri
ISO 9001 and CMM: 1: Management responsibility 2: Document control 3: Purchasing 4: Training 5: Internal quality audit
Describe the method of Technical documentation This usually comprises: - Program listing/coding - Programming language(s) used - Algorithm/Flowchart - Purpose o
Testing a new or an changed data processing system with the similar source data that is used in another system. The other system is taken as the standard of comparison.
Explain the term- System Maintenance update hardware as new items come on market or company changes in any way which requires new devices to be updated/added Update sof
Explain in detail structure with diagram
Give the example of the mechanics of structured analysis
What are the testing principles the software engineer must apply whereas performing the software testing? i. All tests should be traceable to customer requirements. ii. Test
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