C175 PRACTISE TEST ASSESSMENT PRACTISE TEST

C175 PRACTISE TEST ASSESSMENT PRACTISE TEST
C175 Practice

Multiple Choice

1. The Entity-Relationship (E-R) model is .
a. a diagramming technique that describes record structures (i.e. the fields that make
up the records of a file)
b. an alternative to indexing and hashing as a means for providing direct access
in files
c. a diagramming technique that describes entities, their attributes, and the
relationships between them
d. an alternative to file design in which attributes are used instead of fields
e. a diagramming technique that relates entities to each other, attributes to
each other, and relationships to each other


2. An association between entities is a(n) .
a. entity type
b. entity occurence
c. record
d. attribute
e. relationship


3. A binary relationship is a relationship between two .
a. entity types
b. attribute types
c. associations
d. files
e. cardinalities


4. The term “binary” in binary relationship indicates that the relationship is between
a. two halves of an entity type
b. two entity types
c. two divisions of an entity’s attributes
d. two attributes
e. two relationships


5. The cardinality of a relationship is .
a. The minimum number of entities that can be involved in the relationship.
b. The maximum number of entities that can be involved in the relationship.
c. The minimum number of attributes that can be in the entity types in a relationship.
d. The maximum number of attributes that can be in the entity types in
a relationship.

, e. The minimum number of associations that can be involved in the relationship.


6. The modality of a relationship is .
a. The minimum number of entities that can be involved in the relationship.
b. The maximum number of entities that can be involved in the relationship.
c. The minimum number of attributes that can be in the entity types in a relationship.
d. The maximum number of attributes that can be in the entity types in
a relationship.
e. The minimum number of associations that can be involved in the relationship.


7. A one-to-one binary relationship .
a. involves a single entity type
b. involves two entity types
c. allows an occurrence of one entity type to be associated with several
occurrences of another entity type
d. allows an occurrence of one entity type to be associated with several
occurrences of another entity type and vice versa
e. restricts the number of attributes that an entity has


8. A one-to-many binary relationship allows an occurrence of the entity type on the “one
side” of the relationship to be associated with .
a. a single occurrence of the same entity type
b. multiple occurrences of the same entity type
c. a single occurrence of the entity type on the “many side” of the relationship
d. multiple occurrences of the entity type on the “many side” of the relationship
e. multiple occurrences of the entity type on the “one side” of the relationship


9. A many-to-many binary relationship allows an occurrence of one entity type to be
associated with .
a. a single occurrence of the same entity type
b. multiple occurrences of the same entity type
c. a single occurrence of another entity type
d. multiple occurrences of another entity type
e. multiple occurrences of three entity types


10. A business school’s faculty parking lot has assigned parking spaces. Each professor
is entitled to one parking space. This is an example of a relationship.
a. one-to-one binary
b. one-to-many binary
c. many-to-many binary
d. one-to-one unary