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Q.1
An attribute describes the entity's characteristics.
True
False
Q.2
When designing a database, first identify the entities, then determine the attributes, and finally establish the relationships.
True
False
Q.3
In which of the following is a single-entity instance of one type of related to a single-entity instance of another type?
One-to-One Relationship
One-to-Many Relationship
Many-to-Many Relationship
Composite Relationship
Q.4
Entities can be associated with one another in which of the following?
Entities
Attributes
Identifiers
Relationships
Q.5
Which type of entity has its relationship to another entity determined by an attribute in that other entity called a discriminator?
Supertype entity
Subtype entity
Archetype entity
Instance entity
Q.6
A subtype entity is a special case of another entity called a supertype entity.
True
False
Q.7
Which type of entity represents a logical generalization whose actual occurrence is represented by a second, associated entity?
Supertype entity
Subtype entity
Archetype entity
Instance entity
Q.8
In a one-to-many relationship, the entity that is on the many side of the relationship is called a(n) ________ entity.
parent
child
instance
subtype
Q.9
An attribute that names or identifies entity instances is a(n):
entity.
attribute.
identifier.
relationship.
Q.10
Properties that describe the characteristics of entities are called:
entities.
attributes.
identifiers.
relationships.
Q.11
In which of the following can many entity instances of one type be related to many entity instances of another type?
One-to-One Relationship
One-to-Many Relationship
Many-to-Many Relationship
Composite Relationship
Q.12
Which of the following refers to something that can be identified in the user's work environment, something that the users want to track?
Entity
Attribute
Identifier
Relationship
Q.13
In which of the following is a single-entity instance of one type related to many entity instances of another type?
One-to-One Relationship
One-to-Many Relationship
Many-to-Many Relationship
Composite Relationship
Q.14
Which of the following refers to an entity in which the identifier of one entity includes the identifier of another entity?
Weak entity
Strong entity
ID-dependent entity
ID-independent entity
Q.15
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?
Supertype entity
Subtype entity
Archetype entity
Instance entity
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