In an ER diagram, a diamond represents:

Question

BlackTom AI · Accepted Answer

In ER diagrams, different symbols represent different concepts, so identifying what a diamond stands for is a key part of interpretation.
Option 1: 'Relationship' — This is the correct interpretation for a diamond in an ER diagram. Diamonds denote relationships between entities, capturing how entities are connected and interact with one another.
Option 2: 'Foreign Key' — Foreign keys are attributes that reference primary keys in another entity. They are typically drawn as ovals (attributes) attached to an entity rectangle, not as diamonds, so this option mislabels the symbol.
Option 3: 'Primary Key' — Primary keys are specific attributes that uniquely identify records within an entity. Like foreign keys, they are represented as attributes (ovals) or underlined identifiers, not diamonds, so this is inaccurate for the symbol in question.
Option 4: 'Attribute' — Attributes are the basic data properties of an entity and are drawn as ovals connected to the entity rectangle. The diamond shape is not used for attributes, making this option incorrect for the symbol described.
Overall, the diamond shape in an ER diagram is used to represent the relationship between entities, illustrating how they are associated or interact with one another rather than describing data properties or keys.

ISYS2120 (ND) Practice Quiz EFT-S2 2025

In an ER diagram, a diamond represents:

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ISYS2120 (ND) Practice Quiz EFT-S2 2025

In an ER diagram, a diamond represents:

View Explanation

Log in for full answers

Similar Questions

In an ER diagram, the weak entity is typically depicted with a _________ ___________, and the relationship between the weak entity and the strong entity is shown with a __________ ___________.

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Question at position 49 In an ERD, cardinality specifiesThe range of allowable values for an attributeThe unique identifier for an entityThe minimum and maximum number of instances of one entity that can be associated with instances of another entityThe number of attributes within an entity

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In an ER diagram, the weak entity is typically depicted with a ___ _, and the relationship between the weak entity and the strong entity is shown with a _____.