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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.
Mention some of the Design principles. The design process should not vary from tunnel vision. The design should not reinvent the wheel. The Design should exhibit unifo
How to compute the cyclomatic complexity? The cyclomatic complexity can be calculated by any one of the following ways. 1. The numbers of regions of the flow graph correspon
What are the demerits of spiral model? i. It is depends on customer communication. If the communication is not suitable then the software product that gets developed will not r
IMPORTANT ISSUES SRS MUST ADRESS
Mention some of the drawbacks of RAD model. Unuseful for a large-scale projects. Interest of developers & customers are necessary. Not useful and perfect when technica
Define the concept of SRS An SRS clearly defines following: • External Interfaces of the system: They identify information which is to flow 'from and to' to the system.
What is meant by System Requirements? Place the system services and constraints in detail. Serves as a link between the system purchaser & the system developer.
Black Box Testing :-Black Box Testing is also known as behavioural testing, focuses on the functional requirements of the software. It allows the software engineer to derive sets o
What are the benefits of modular design? Changes made during testing and maintenance becomes manageable and they do not affect other modules.
Q. Differentiate between iterative Enhancement Model and Evolutionary Development model. Ans. Iterative Enhancement Model: This model has the similar phases as the waterfall
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