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Home » Basics of Computer Science Questions and Answers » The Entity-Relationship Model Questions and Answers

The Entity-Relationship Model Questions and Answers:

	What is E-R data model?
	What is E-R diagram?
	Define entity.
	Define attribute.
	What is entity class and entity set?
	What is entity instance?
	Differentiate between simple attribute and composite attribute.
	What are derived and stored attributes?
	What is Domain?
	Define foreign key.
	What is meant by cardinality of a relationship and degree of a relationship?
	What is difference between Mandatory and Mandatory One Cardinality?
	Define weak and strong entities.
	What is existence dependency?
	What is referential dependency?
	Define aggregation.
	Define Generalization.
	Define specialization?
	What is relationship between supertype and subtype?

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