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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.
a) An ER diagram for the system. Show all entities, relationships, cardinalities and optionalities. Also, include all intersection entities. You must use the Finkelstein method
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What is statement coverage? Statement coverage is the testing to test each statement in the code has been executed at least once.
how to draw decosion table? questions based on decision table.
Q. What are the advantages of using testing tools? Ans: The merits of testing tools are They improve the productivity and quality of software development. Help in
State Entity and relationship diagram. ERD depicts linkage between data objects. The ERD is the notation that is used to execute the data modelling activity. The primary
Q. What is Equivalence Partitioning? Equivalence Partitioning:-Equivalence partitioning is black box testing method that divides the input domain of a program into classes of d
Different characteristics of software measures Different characteristics of software measures identified by Basili (1989) are given below: • Objects of measurement: They i
Problem : (a) What does a UseCase Diagram represent? (b) Draw a UseCase Diagram for the above case study. (c) For any one use case give a detail use case specification.
what is module coupling
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