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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.
Explain different recording modes. There are two type of recording modes: context sensitive and analog. - Context Sensitive - identifies GUI objects and records operations
The following program will display an integral solution to the quadratic equation ax2+bx+c for integral values of a,b, and c, where a,c fall between 0 and 10, while b falls between
Define Software Lifecycle. Software Lifecycle is the time period beginning with the idea for a Software product ending whenever the Software is unavailable for use. SLC = SL
What are the types of Software system requirements ? Functional requirements: Services the system should be required. Non-functional requirements: Constraints on the servi
A University has asked you to design and implement a simple database to store student and module details (including details of which school students belong to and which schools run
What are the Related data items Related data items captures details of related attributes. Range of values store total possible values of that data. Data structure definition c
Determine the aspects of prototyping model. Figure below portrays prototyping model. Prototype model has the below aspects: (i) It helps in determining user requirements
Q. Illustrate the Features of function count? Features:- Function point goes forward is independent of the language tools or methodologies used for implementation.
Explain in brief the concept of Functional independence ?
What is Dynamic and static metrics? Dynamic metrics are closely related to software quality attributes It is relatively easy to measure the response time of a system (per
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