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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.
Write down the concept of Functional independence. a. Functional independence is gained by developing modules with "single minded" function and an "aversion" to extreme intera
What are the aims of Analysis modelling? i. To make apparent what the customer wants. ii. To set up a basis for the creation of software design. iii. To devise a set of v
risks and types of software risks
Q. How does the risk factor affect the spiral model of software development? Ans: Risk Analysis phase is the most vital part of Spiral Model. In this phase all probable (and
Problem 1 (i) Define the terms Language Grammar Terminal symbols Non-Terminal symbols Alphabets >>Define sub parts (ii) Identify and write what these
Q. Write short notes on Quick-fix Model? Quick-fix Model: This is the simplest model utilized for the maintenance of the software. In this model modification at the code level
What is software engineering? Software engineering is a regulation in which theories, methods and tools are applied to make professional software.
A test method satisfying coverage criteria that needs each decision point at every possible branch to be implemented at least once.
What are the phases of Problem solving Loop? Problem definition shows the problem to be solved. Technical developmentSolve the Problem by some Technology. Solution Integr
what are the PEAS of E-mail agent
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