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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.
Create a compound data type called Post to store messages posted on Google+. Post should include: Name / Data Type / Description date / char [9] / date fields for
explain levels of transparency
What are the advantages and disadvantages of big-bang? Advantages: This approach is easy. Disadvantages: It is hard to debug. It is not simple to isolate errors while testin
Explain the types of software testing. Unit testing Integration testing System testing User-acceptance testing End-to-End testing Exception testing
What is cyclomatic complexity? Cyclomatic complexity is software metric that gives the quantitative measure of logical complexity of the program. The Cyclomatic complexity e
Explain the process of Software Testing Testing is the process of running the software on manually created inputs with intention to find errors. In process of testing, an atte
Repeated inheritance If a class inherits more than once from the same class then it is referred to as repeated inheritance.
"State how you would type arguments h, o, w, n, o, w to the macro cat, define(cat, $1$2$3$4$5$6$7$8$9) so that the printed result was how now Describe exactly what happens when
developer
QUESTION - Time Synchronization (a) Why is computer clock synchronization of paramount importance? Give 2 business scenarios whereby time accuracy is critical? (b) Computers
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