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What are the factors to be taken into account when choosing a RAID level?
A) Monetary cost of extra disk storage requirements.
B) Performance requirements in terms of number of I/O operations
C) Performance when a disk has failed.
D) Performances during rebuild.
what is view?explain
Serialisable Schedules: If the processes of two transactions conflict with each other, how to verify that no concurrency related problems have happened? For this, serialisability t
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Question: (a) Can a set of data requirements be correctly modelled by two or more different ER diagrams? Explain your answer. You may use a small example, if you think it will
why shadow copy technique is used?
Define the Wait for graph Ans: The wait-for-graph is a directed graph and consist of nodes and directed arcs; the nodes of the graph are active transactions. An arc of the grap
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Create 1 experiment to demonstrate an aspect of query optimisation by using access-path structures (indexes), decomposition, or denormalisation. Once satisfied with your experiment
Many-to-many : Entities in A and B are related with any number of entities from each other. Example: Taught_by Relationship among course and faculty. One faculty member ca
what characterizes the levels in RAID technology
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