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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.
A Software Requirements Specification (SRS) is a complete description of the behavior of the system to be developed. It includes a set of use cases, describing the interactions
What is Delphi model? In Delphi method, a number of parameters to be considered based on as experts estimates. The group estimate is taken as on an average of the weighted
Define about the erroneous data - Test data Abnormal/erroneous data - This is data outside the limits of validity/acceptability and must cause an error message to be g
It is possible to assign a local data object defined in a subroutine or function module to a field group. False.
What are the general activities in design process? i. System structuring - The system is separated into principle subsystems components and communications among these subsystem
State Lehman's First law. A program that is used in true world environment essentially must change or become progressively less useful in that environment.
Static testing and dynamic testing Static testing is checking the application without actually running the application while dynamic testing checks the application by running i
Question: (a) Describe fully the first five basic steps in software cost estimation. (b) What are the main differences between COCOMO1 and COCOMO2 cost estimation models?
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
Question 1 Discuss the Limitation of the linear sequential model in software engineering Question 2 What is Software reliability? Why reliability is more important than effic
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