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Diagrammi ER

Quiz by prof. Maurizio Conti

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Q 1/4
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What is the purpose of an ER diagram?
29
To visually represent the relationships between entities in a database
To design a web page layout
To write computer program code
To perform calculations in a spreadsheet

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4 questions

Show answers

Q1
What is the purpose of an ER diagram?
To visually represent the relationships between entities in a database
To design a web page layout
To write computer program code
To perform calculations in a spreadsheet
30s
Q2
What is an entity in an ER diagram?
A line connecting two entities
A database table
A property or characteristic of an entity
A distinct object or concept in the real world that is represented in a database
30s
Q3
What is cardinality in an ER diagram?
The size of the diagram
The shape of an entity in the diagram
The color used for relationships
The number of instances an entity can be associated with in a relationship
30s
Q4
What does a diamond shape represent in an ER diagram?
An attribute of an entity
A relationship between entities
A database table
A constraint in the diagram
30s

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