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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.
What are the various testing activities? i. Test planning ii. Test execution iii. Test case design iv. Data collection v. Effective evaluation
Question: (a) ‘Information Strategy involves the encompassing of an organisation's information requirements and information systems planning with its long-term objectives.' T
Describe software measure ?
Static testing tools: 1. Static analysers 2. Code inspectors 3. Standard Dynamic testing tools 1. Coverage analyzers (execution verifiers) 2. Output co
What is Transform mapping? The transform mapping is a set of design steps applied on the DFD in order to map the transformed flow characteristics into exact architectural style
Q. What is Function points? Function points : Function point calculates the functionality from the user opinion that is on the basis of what the user request and receives in r
Please name some of the best (most successful) encryption models for use in the business community. I need to know the benefits and disadvantages of each, as well as the cost effec
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Function testing of OO software is no dissimilar than validation testing of procedural software. Client involvement is generally part of this testing stage. In OO environment use c
What is configuration Management? Software Configuration management (SCM) is the task of tracking and controlling alters in the software. Configuration management practices con
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