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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.
Discuss some of the problems that are faced during maintenance of software. The problems are: - Often another person or group of persons working over the years in isolat
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.
Software project planning entails what activities?
Document interchange standards Interchange standards permit electronic documents to be exchanged mailed, etc. Documents are produced using dissimilar systems and on differe
What are the types of static testing tools? There are three types of static testing tools. Code based testing tools - These tools utilize source code as input and generate t
What is quality? Quality, simplistically, means that a product should meet its requirement. This is problematical for software systems. There is a tension among custom
A consistent measure of software size based on user needs.
What is a document version? Ans) A document version is a first release (or complete re-release) of a document, as opposed to a revision resulting from issuing change pages to a
Q. Explain Static multivariable model? They relies on several variables representing various aspects of the software development environment for example methods used and user p
assignment
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