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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.
Write short note on black box testing. The black box testing is also known as behavioural testing. This method fully focuses on the functional needs of the software. Tests are
Question: (a) State and explain the essential API concepts associated with J2ME. (b) Connected Limited Device Configuration provides two types of application security; stat
Database Management Systems: These are essentially programming frameworks, and can offer good storage and retrieval systems. They are mainly intended for programmers to intera
How many types of traceability in software engineering? i. Source traceability - These are generally the links between requirement to stakeholders who suggests these requiremen
Distinguish between alpha testing and beta testing. Alpha test and Beta test The alpha test is prepared at the developer site. The software is used in a natural setting wi
Problem: (a) Define measurement and briefly summarize the representation condition for measurement. (b) Software metrics is a term that embraces many activities, all of whi
Testing conducted to classify a system or component at or beyond the limits of its described requirements.
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Name the techniques used in behavioural model In conventional approach of modeling, analyst collects great deal of comparatively unstructured data through data gathering tools
What is data dictionary entry explain
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