COMPUTER SCIENCE AND ENGINEERING
CLOUD COMPUTING
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Entities, Attributes, Relationships
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Entities, Process, Connection
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Entities, Attributes, Process
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None of the above
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Detailed explanation-1: -What are the components of an entity-relationship diagram? ER diagrams or ERD’s are composed of three main elements: entities, attributes, and relationships. Entities-typically displayed in a rectangle, entities can be represented by objects, persons, concepts, or events that contain data.
Detailed explanation-2: -Entity Relationship Diagram (ERD) Symbols and Notations. There are three basic elements in an ER Diagram: entity, attribute, relationship.
Detailed explanation-3: -An entity set is a group of similar entities and these entities can have attributes. In terms of DBMS, an entity is a table or attribute of a table in database, so by showing relationship among tables and their attributes, ER diagram shows the complete logical structure of a database.
Detailed explanation-4: -Attributes are represented by ellipses. Ellipses are name with attribute name and connected with rectangle (entity). Simple and Single valued attributes are represented by ellipse. Multi valued attributes are represented by double-lined ellipse.