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What types of adjustments are required to increase chances of inheritance.
a) Some attributes can be added or ignored in the base class operation
b) Some changes can be made in derived class from abstract class.
c) If an operation is not required by few classes in a group, then could it be
declared as no-operation.
d) Similar attributes can be combined in the abstract base class.
Q.1 Briefly discuss the different layers of ANSI SPARC architecture. Ans: The three layers of ANSI SPARC architecture are like this: 1. Internal view is at the lowest leve
Increased overheads on update : On the drawbacks side, it will need the system to ensure that all replicas of a relation are consistent. This shows that all the replicas of the rel
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With the help of a suitable diagram gives module wise explanation of system architecture of DBMS.on..
Differentiate between Key and superkey? Key and superkey - A key a single attribute or a combination of two or more attributes of an entity set in which is used to identify o
Submission Requirements All answers must be computer generated (including text and diagrams). The hand-in version must include a header page (or with sufficient space)
Dependency Preservation It is obvious that the decomposition must be lossless so that we do not lose any information from the relation that is decomposed. Dependency preservati
Example: //REVOKE ALL ON EMP FROM MCA12; (All permissions will be cancelled) You can also cancel only some of the permissions. Drop: A user-
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