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In an ER model, what does a circle represent?

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Question: In an ER model, what does a circle represent?

Options:

  1. An entity
  2. An attribute
  3. A relationship
  4. A weak entity

Correct Answer: An attribute

Solution: 

A circle in an ER model represents an attribute of an entity.

In an ER model, what does a circle represent?

Practice Questions

Q1
In an ER model, what does a circle represent?
  1. An entity
  2. An attribute
  3. A relationship
  4. A weak entity

Questions & Step-by-Step Solutions

In an ER model, what does a circle represent?
Correct Answer: A circle represents an attribute of an entity.
  • Step 1: Understand what an ER model is. It stands for Entity-Relationship model, which is used to represent data and its relationships.
  • Step 2: Identify the components of an ER model. The main components are entities, attributes, and relationships.
  • Step 3: Know what an entity is. An entity is a thing or object in the real world that can be identified.
  • Step 4: Learn about attributes. Attributes are characteristics or properties of an entity.
  • Step 5: Recognize the shape used for attributes in an ER model. A circle is used to represent an attribute.
  • Step 6: Conclude that when you see a circle in an ER model, it means it is showing an attribute of an entity.
  • Entity-Relationship Model – A conceptual framework used to describe the data and relationships in a database.
  • Attributes – Properties or characteristics of an entity represented in an ER model.
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