An entity is represented by set of –

Answer: Attributes (एट्रिब्यूट्स)

Definition: An entity is a real-world object or concept in a database. It is represented by a set of attributes, where each attribute is a property that describes some aspect of the entity.

Attributes explained:

• Attributes are data fields that characterize an entity (for example, for a Student: name, roll number, date of birth, address).

• Together these attributes form the representation of the entity and distinguish one instance from another (one or more attributes can act as a key).

Why the other choices are incorrect:

• A relationship links entities and describes how they are associated; it is not the set of properties that represent a single entity.

• A model is a broader abstraction (such as a data model) used to design or describe systems; it is not the direct set of properties for one entity.

• 'None' is incorrect because entities are always described by attributes in database design.