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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.
Q. Define Aggregation among objects? Aggregation between objects represents a relationship. It is a whole/part relationship. Aggregation may perhaps imply containment.
Explain the Length of identifiers Length of identifiers :- This is a measure of the average length of separate identifiers in a program. The longer the identifiers, the more
role of srs
What is meant by software change? Software change is explained as the change in nature of software as the needs of software changes.
What are functional and non-functional requirements?
Evolutionary Prototype In this, prototype is constructed to learn about software problems and their solutions in successive steps. Prototype is initially developed to satisf
Question: You work with Mr Akshay Kapoor, Human Resource Manager of an IT Company called LTZ. Mr Kapoor is the Chairperson of the Human Resource Policy Committee. Other members
What is the value of a testing group? How do you justify your work and budget? Testing is a method used for revealing defects in s/w and for establishing that the s/w has attai
Define Fan-in & Fan-out. Fan-out - A measure of the number of modules that are directly controlled by another module. Fan-in- Shows how many modules directly control a give
What is the difference in writing the test cases for Integration testing and system testing? Integration testing is done at module level when lots of modules are integrated wit
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