Database Data Modeling with ER Model Online Test Series 2024

Which of the following indicates the maximum number of entities that can be involved in a relationship?

Which type of entity cannot exist in the database unless another type of entity also exists in the database, but does not require that the identifier of that other entity be included as part of its own identifier?

In a one-to-many relationship, the entity that is on the one side of the relationship is called a(n) ________ entity.

Which type of entity represents an actual occurrence of an associated generalized entity?

A recursive relationship is a relationship between an entity and ________ .

Which of the following indicates the minimum number of entities that must be involved in a relationship?

Which of the following refers to something that can be identified in the users’ work environment, something that the users want to track?

In which of the following is a single-entity instance of one type related to many entity instances of another type?

Which of the following refers to an entity in which the identifier of one entity includes the identifier of another entity?

Which type of entity is related to two or more associated entities that each contain specialized attributes that apply to some but not all of the instances of the entity?

An attribute that names or identifies entity instances is a(n):

Properties that describe the characteristics of entities are called:

In which of the following can many entity instances of one type be related to many entity instances of another type?

Entities of a given type are grouped into a(n):

Which of the following is NOT a basic element of all versions of the E-R model?

In which of the following is a single-entity instance of one type of related to a single-entity instance of another type?

Entities can be associated with one another in which of the following?

Which type of entity has its relationship to another entity determined by an attribute in that other entity called a discriminator?

Which type of entity represents a logical generalization whose actual occurrence is represented by a second, associated entity?

In a one-to-many relationship, the entity that is on the many side of the relationship is called a(n) ________ entity.

An ID-dependent entity is an entity whose identifier is a composite identifier where no portion of the composite identifier is an identifier of another entity.

A ternary relationship is so called because in contains two entities and one association between them.

All instances of an entity class have the same attributes.

A minimum cardinality is the minimum number of entity instances that may participate in a relationship instance.

An attribute describes the entity’s characteristics.

The degree of a relationship refers to the number of entity classes in the relationship.

Entities use identifiers while tables use keys.

Composite identifiers consist of two or more attributes.

When designing a database, first identify the entities, then determine the attributes, and finally establish the relationships.

A subtype entity is a special case of another entity called a supertype entity.