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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.
Define Requirement Engineering. Requirement Engineering is a process that includes all of the activities needed to create and maintain a system requirements document. The fo
What are the various types of coupling? i. Data coupling - The data coupling is likely by parameter passing or data interaction. ii. Control coupling - The modules share c
How the CASE tools are classified? CASE tools can be classified by A. By function or use B. By user type(e.g. manager,tester),or C. By stage in software engineering pr
What are the benefits of prototyping? i. Prototype uses as a basis for deriving system specification. ii. Design quality can be better. iii. System can be handled efficie
What does Data abstraction contains? A Data abstraction is a named collection of data that defines a data object Eg: door Attributes: door type, Opening mechanism, Swing di
Q. Explain about non-functional requirement for a software ? Ans) Nonfunctional requirements are the basic characteristics of the system which will not be expressed as function
Errors from previous stage Errors passed through Amplified errors Newly generated errors Errors passed to next stage Testing phase of project-A 35 35 0 5 20 Testing phase of Projec
Functions that dynamic testing tools supports: 1: Input setting: selecting of the test data that the test object reads when called. 2: Stub processing : handling output
Define software measurement. A software measurement is a procedure or way that applies software measures to a class of software engineering objects to achieve a predefined goa
Bottom-up testing is a method of integration testing. A test engineer makes and uses test drivers for components that have not yet been developed, because, with bottom-up testing,
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