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WGU C175 OBJECTIVE ASSESSMENT PRACTICE TEST ANSWERS| IT CIS111 TEST BANK 1

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WGU C175 OBJECTIVE ASSESSMENT PRACTICE TEST ANSWER 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 fi...

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Información del documento

  • 31 de octubre de 2020
  • 15
  • 2024/2025
  • Examen
  • Preguntas y respuestas

Temas

  • the term “binary”
  • wgu c175 objective assessment
  • the entity relationship e r model is
  • an association between entities is an
  • a binary relationship is a relationship between two

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Chapter 2 Data Modeling


WGU C175 OBJECTIVE ASSESSMENT PRACTICE ANSWERS
Chapter 2: Data Modeling


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

Ans: c
Response: See page 20


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

Ans: e
Response: See page 20


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

Ans: a
Response: See page 20


4. The term “binary” in binary relationship indicates that the relationship is between
a. two halves of an entity type

, Chapter 2 Data Modeling


b. two entity types
c. two divisions of an entity’s attributes
d. two attributes
e. two relationships

Ans: b
Response: See page 20


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.

Ans: b
Response: See page 23


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.

Ans: a
Response: See page 24


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

Ans: b
Response: See page 23

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