Question 1 of 25
Hints left: 3
Q1
Properties that describe the characteristics of entities are called:
Q2
A primary key is a composite key that was selected to be the main identifier for the relation.
Q3
A primary key is a composite key that was selected to be the main identifier for the relation.
Q4
Which type of entity has its relationship to another entity determined by an attribute in that other entity called a discriminator?
Q5
In which of the following can many entity instances of one type be related to many entity instances of another type?
Q6
Which of the following refers to an entity in which the identifier of one entity includes the identifier of another entity?
Q7
Which of the following is NOT a basic element of all versions of the E-R model?
Q8
Which of the following indicates the maximum number of entities that can be involved in a relationship?
Q9
Which type of entity represents an actual occurrence of an associated generalized entity?
Q10
Entities can be associated with one another in which of the following?
Q11
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?
Q12
Which of the following indicates the minimum number of entities that must be involved in a relationship?
Q13
In which of the following is a single-entity instance of one type of related to a single-entity instance of another type?
Q14
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?
Q15
In which of the following is a single-entity instance of one type related to many entity instances of another type?
Q16
In a relation, the rows are sometimes called "fields".
Q17
Entities of a given type are grouped into a(n):
Q18
A recursive relationship is a relationship between an entity and ________ .
Q19
Which of the following refers to something that can be identified in the user's work environment, something that the users want to track?
Q20
An attribute that names or identifies entity instances is a(n):
Q21
A functional dependency is always an equation.
Q22
A relation has cells that hold multi-value entries.
Q23
In a one-to-many relationship, the entity that is on the one side of the relationship is called a(n) ________ entity.
Q24
A primary key is a composite key that was selected to be the main identifier for the relation.
Q25
A primary key is a composite key that was selected to be the main identifier for the relation.