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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.
Why is SRS also known as the blackbox specification of system ? Ans: SRS document is a contract among the development team and the customer. Once the SRS document is accepted
The restructuring helps in maintaining a program in the following ways: (a) Programs have higher quality, good documentation, less complexity, and conformance to modern
What is Upward compression? Ans) In software design, "upward compression" means a type of demodularization in which a subordinate module is copied into the body of a better modu
Distinguish software faults and software failures Ans: In case of a failure, the software does not do what the user expects. A fault is a programming error that may or may not
After studying the module you should understand the principles and techniques associated with modular software development. After studying the module you should understand the c
Explain the types of software testing. Unit testing Integration testing System testing User-acceptance testing End-to-End testing Exception testing
Q 1 Define a software process. How do software myths affect a software process? Ans: A Software process is a Coherent set of activities for designing, specifying, implementin
The spiral model of software development Contains project risks evaluation during every iteration
design steps
Testing designed to challenge a system's capability to handle the maximum amount of data over a period of time. This type of testing also classify a system's ability to handle over
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