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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.
an isolated metal sphere has a radius r. when charged to a potential v, the charge on sphere is q. 1- state an expression, in terms of r and q, for potential v of sphere.
Important factors related to library storage operation: It is essential to consider some important factors related to library and information storage and retrieval operations
What does data object means? Data object is a group of attributes that behave as an aspect, quality, characteristic or descriptor of the object.
Function points: Function point calculates the functionality from the user point of view, that is, on the basis of what the user request and receives in return. Thus, it deals wit
TECHLIB Plus microcomputer based software package: This is yet another comprehensive package based on BASIS plus, one of the world's leading Document DBMS and Text Retrieval S
a simple text processing program with all essential functions (open and save text documents, insert and delete text, search for words). We assume that text read from a file is stor
schema tools
Q. Explain Test harness systems and Test archiving systems? Test harness systems: This is one that is bound around the test object and that permits the easy modification a
Question: a) Discuss which communication method/s you would use in the following situations. Justify your answer. i. Congratulating an employee on obtaining a promotion.
What does Modularity concept mean? Software architecture embodies modularity; ie, Software is named in to addressable components called as modules that are integrated finally.
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