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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.
When is RTM (Requirement traceability matrix) prepared - after or before test case designing? - RTM is prepared before test case designing. - Requirements must be traceable
Explain Evolutionary prototyping Objective: The principal objective of this model is to deliver the working system to the end-user. Example-AI systems. Advant
A discrepancy among a computed, observed, or calculated value or condition and the true, specified, or theoretically correct value or condition; and
(a) What is a view? (b) What is the implication of creating a view with the select * statement in the view definition? (c) Make reference to the relational schema given in
Problem 1 . What is the purpose of Symbol Table? Write a brief note on various Data structures used in implementing Symbol Tables Stating Purpose Writing note on various D
Write down the Data dictionary for the data item "Telephone Number". Names: Telephone number Aliases: none Where to use /How to use: assess against set-up Explanation
assignment
A measure of the severity and probability of undesired effects. Often taken as the easy product of probability and consequence.
Test Configuration Managers handles test environments, scripts, software and test data. Depending on the project, single person may wear more than single hat. For example, Test Eng
Explain the process of Software Testing Testing is the process of running the software on manually created inputs with intention to find errors. In process of testing, an atte
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