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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.
Describe the method of Technical documentation This usually comprises: - Program listing/coding - Programming language(s) used - Algorithm/Flowchart - Purpose o
A test method satisfying coverage criteria that needs each decision point at every possible branch to be implemented at least once.
You have been commissioned to design and run the usability testing for an upcoming e-commerce website that will sell computing hardware and software. In this first part of the
What is architectural evolution? Architectural evolution is the method of changing a system from a centralized architecture to a distributed architecture as client server.
What is software engineering? Software engineering is a discipline in which theories, process and tools are applied to develop professional software.
Define Data Flow Diagram. A Data flow diagram is a graphical representation that depicts information flow & the transforms that are applied as data move from input to output.
Problem: a) Assume a washing machine. List all possible states of the washing machine. Draw a state diagram showing also the events triggering the change of states where poss
A program is to be developed to simulate the operations of a scientific calculator. List the facilities to be provided by this calculator. Analyze this using a DFD 0 - level and 1
How to interpret software metrics(any metrics)...i need an example
Q. Explain about Software Risks - Dependencies? Dependencies: -Many risks arise because of dependencies of project on outside agencies or factors. It isn't easy to control thes
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