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Implementing software control
To implement software control designer must redesign strategy of state event model which is present in dynamic model.
There are three basic approaches to implement dynamic model. These approaches are as given:
i) Storing the state of the program as location within a program, i.e. as a procedure driven system
ii) Direct implementation of the state machine mechanism i.e. event driver
iii) With the help of concurrent tasks.
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
Describe Parameteric end users? Parametric end users might be given update access, but are commonly not permitted to change the structure of data.
What is DAG? The class-subclass relationship is shown by a directed acyclic graph.eg: employees can be temporary or permanent. We might be create subclasses temporary \and perm
what should be included in this???
What are the two types of indices? The two types of indices are:- A) Dense index B) Sparse index
What is difference between TRUNCATE and DELETE? - Truncate can't be rolled back whereas Delete can be. - Truncate keeps the lock on table whereas Delete keeps the lock on ea
Critically evaluate the bulleted list of information-related items in this case study. How are each contradictory to the notion of being an information-literate knowledge worker?
why shadow copy technique is used?
Self-Join: In a self join a table is joined with itself. Let consider the following sample partial data of EMP table EMPNO ENAME MGRID
Explain degree of relation? Degree of a Relation - The degree or arity of a relation is the number of attributes n of its relation schema.
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