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Explain Candidate key? Candidate Key - A candidate key is a minimal superkey, that can be used to uniquely identify a tuple in the relation.
How many levels can be viewed in Architecture of the database ? Architecture of the database can be viewed as three levels.
In an E-R diagram an entity set is represent by? In an E-R digram entity set is represted by rectangle.
What Command You Use What Day of the week were you born
What are multiple inheritances? Multiple inheritances allow a class to inherit variables and methods from many super classes.
Sequences Sequences: Automatically produce unique numbers Are sharable Are typically used to make a primary key value Replace application code Speed up t
What is advantage of two-way association? Two-way association advantages are following: a) Independent of the classes. b) Useful for existing predefined classes that are
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
Data Mining 1. What is data mining? Write Data Mining applications. 2. Explain OLAP? Write the benefits of OLAP. 3. What are the key features of a Data Warehouse? 4. W
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