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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.
Ask quewhat is code restructuringstion #Minimum 100 words accepted#
box diagram with example
Q. Describe the various types of restructuring techniques? Ans. Software restructuring modifies source code as well as data an effort to make it amenable to future changes
Case Study: LHM is a London based privately owned hospital which provides healthcare to its patients. The hospital uses in-house software to manage and service its patients whi
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
What are the testing principles the software engineer must apply while performing the software testing? i. All tests should be traceable according to customer requirements.
Checks the interfaces among program elements for consistency and adherence to predefined axioms or rules.
What are the common approaches in debugging? Brute force method: The memory dumps and run-time tracks are explained and program with write statements is loaded to get clues to
What is the meaning of System Engineering? System Engineering means designing, deploying, implementing and operating systems which include hardware, software and user.
Comparison testing is testing that evaluate software weaknesses and strengths to those of competitors' products.
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