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Question:
(a) What are the challenges in the development of Large Scale Distributed Real Systems?
(b) What is backward engineering and forward engineering in a design package? Give one disadvantage of backward engineering.
(c) Describe in what two situations data replication may be applied.
(d) What is the implication of data replication?
(e) Will data replication be used in a large scale system?
Explain Alternate key? Alternate Key - All the candidate keys except primary key are known as alternate keys.
What is object identity? An object retains its identity even if some or all the values of variables or explanations of methods change overtime.
About Attribute inheritance
Consistency error : These errors happen due to the inconsistent state of database caused may be due to wrong implementation of commands or in case of a transaction abort. To overc
There are many simple and complex approaches to implement. These reports are based on some views or certain query. The following number of reports can be built. 1. The averag
Association as a cache This association must be updated when any new element is added to it, but testing for overlap using association is more efficient. Figure:
Which is another name for weak entity? Child is another name of weak entity.
why three level architecture had been developed/
Give short note on the following terms:Dirty pages and ETL a.) Dirty pages. These are buffer pages which comprise modifications which haven't been written to disk. b.
Desirable Properties Of Decomposition Decomposition is a process of dividing a relation into its projections that will not be disjoint. Please remind the Relational projection
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