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Explain how the associations are implemented as classes.
A general approach in this case is to transform an association class into a simple class linked to two original classes with the two new associations, as shown in Figure.
Figure: Transforming the association into a class
How does the system cope up with a record crash when recovery is going on after the first crash? Ans: In a system the undo and redo operations are needed to be idempotent to c
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Types of Data fragmentation
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A student entity type has the following attributes,name..
what is query processing?
What is nested relational model? The nested relational model is an extension of relational model in which domains might be either atomic or relation valued.
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