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Pregunta 1
Pregunta
1. The ERD represents the ____ database as viewed by the end user.
Respuesta
-
A) condensed
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B) physical
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C) logical
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D) conceptual
Pregunta 2
Pregunta
2. Some ____ database modeling concepts can be expressed only using the Chen notation.
Respuesta
-
A) developmental
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B) conceptual
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C) actual
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D) specific
Pregunta 3
Pregunta
3. Attributes may share a ____.
Respuesta
-
A) name
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B) domain
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C) location
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D) table
Pregunta 4
Pregunta
4. The set of possible values for an attribute is a ____.
Respuesta
-
A) domain
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B) range
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C) set
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D) key
Pregunta 5
Pregunta
5. In an ER diagram, primary keys are indicated by ____.
Respuesta
-
A) bolding
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B) italics
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C) underlining
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D) a special font
Pregunta 6
Pregunta
6. Ideally, an entity identifier is composed of ____ attribute(s).
Respuesta
-
A) zero
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B) one
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C) two
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D) six
Pregunta 7
Pregunta
7. A ____ identifier is composed of more than one attribute.
Respuesta
-
A) primary
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B) foreign
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C) composite
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D) domain
Pregunta 8
Pregunta
8. The ____ attribute(s) make up the primary key in the table definition: CLASS (CRS_CODE, CLASS_SECTION, CLASS_TIME, CLASS_ROOM, PROF_NUM)
Respuesta
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A) CRS_CODE
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B) CLASS_SECTION
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C) CRS_CODE and CLASS_SECTION
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D) There is no primary key
Pregunta 9
Pregunta
9. A ____ attribute can be further subdivided to yield additional attributes.
Respuesta
-
A) composite
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B) simple
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C) single-valued
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D) multivalued
Pregunta 10
Pregunta
10. A ____ attribute is one that cannot be subdivided.
Respuesta
-
A) composite
-
B) simple
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C) single-valued
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D) multivalued
Pregunta 11
Pregunta
11. A ____ attribute can have only one value.
Respuesta
-
A) composite
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B) simple
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C) single-valued
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D) multivalued
Pregunta 12
Pregunta
12. ____ attributes can have many values.
Respuesta
-
A) composite
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B) simple
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C) single-valued
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D) multivalued
Pregunta 13
Pregunta
13. Some attributes are classified as ____.
Respuesta
-
A) simple
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B) complex
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C) defined
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D) grouped
Pregunta 14
Pregunta
14. The ____ type of attribute cannot be created in a DBMS.
Respuesta
-
A) derived
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B) multivalued
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C) simple
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D) composite
Pregunta 15
Pregunta
15. A ____ should be a derived attribute.
Respuesta
-
A) person's name
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B) person's age
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C) person's social security number
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D) person's phone number
Pregunta 16
Pregunta
16. A derived attribute ____.
Respuesta
-
A) must be stored physically within the database
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B) need not be physically stored within the database
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C) has many values
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D) must be based on the value of three or more attributes
Pregunta 17
Pregunta
17. A derived attribute is indicated in the Chen model by a ____.
Respuesta
-
A) single line
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B) dashed line
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C) circle
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D) double line
Pregunta 18
Pregunta
18. A relationship is an association between ____.
Respuesta
-
A) objects
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B) entities
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C) databases
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D) fields
Pregunta 19
Pregunta
19. Knowing the ____ number of entity occurrences is very helpful at the application software level.
Respuesta
-
A) maximum
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B) minimum
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C) approximate
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D) maximum and minimum
Pregunta 20
Pregunta
20. In the ERD, cardinality is indicated using the ____ notation.
Respuesta
-
A) (max,min)
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B) (min, max)
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C) [min ... max]
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D) {min\max}
Pregunta 21
Pregunta
21. Another word for existence-independent is ____.
Respuesta
-
A) weak
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B) alone
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C) unary
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D) strong
Pregunta 22
Pregunta
22. An entity is said to be ____-dependent if it can exist in the database only when it is associated with another related entity occurrence.
Respuesta
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A) existence
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B) relationship
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C) business
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D) weak
Pregunta 23
Pregunta
23. If an entity can exist apart from one or more related entities, it is said to be ____-independent.
Respuesta
-
A) existence
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B) relationship
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C) business
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D) weak
Pregunta 24
Pregunta
24. When the PK of one entity does not contain the PK of a related entity, the relationship is ____.
Respuesta
-
A) missing
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B) weak
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C) strong
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D) Neutral
Pregunta 25
Pregunta
25. A ____ entity has a primary key that is partially or totally derived from the parent entity in the relationship.
Respuesta
-
A) strong
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B) weak
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C) business
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D) relationship
Pregunta 26
Pregunta
26. The term “____”is used to label any condition in which one or more optional relationships exist.
Respuesta
-
A) participation
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B) optionality
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C) cardinality
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D connectivity
Pregunta 27
Pregunta
27. The existence of a(n) ____ relationship indicates that the minimum cardinality is at least 1 for the mandatory entity
Respuesta
-
A) mandatory
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B) optional
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C) multivalued
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D) single-valued
Pregunta 28
Pregunta
28. The Crow’s foot symbol with two parallel lines indicates ____ cardinality.
Respuesta
-
A) (0,N)
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B) (1,N)
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C) (1,1)
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D) (0,1)
Pregunta 29
Pregunta
29. A ____ relationship exists when an association is maintained within a single entity.
Respuesta
-
A) unary
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B) ternary
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C) binary
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D) weak
Pregunta 30
Pregunta
30. A ____ relationship exists when two entities are associated.
Respuesta
-
A) unary
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B) binary
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C) ternary
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D) weak
Pregunta 31
Pregunta
31. A ____ relationship exists when three entities are associated.
Respuesta
-
A) unary
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B) binary
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C) ternary
-
D) weak
Pregunta 32
Pregunta
32. ____ relationships are most common.
Respuesta
-
A) unary
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B) binary
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C) ternary
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D) higher-degree
Pregunta 33
Pregunta
33. If an employee within an EMPLOYEE entity has a relationship with itself, that relationship is known as a ____ relationship.
Respuesta
-
A) self
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B) self-referring
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C) looping
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D) recursive
Pregunta 34
Pregunta
34. A(n) ____ entity is composed of the primary keys of each of the entities to be connected.
Respuesta
-
A) associative
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B) recursive
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C) unary
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D) binary
Pregunta 35
Pregunta
35. The associative entity is also known as a ____ entity.
Respuesta
-
A) unary
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B) weak
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C) strong
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D) composite
Pregunta 36
Pregunta
36. The following step occurs first in the process of building an ERD: ____.
Respuesta
-
A) Develop the initial ERD
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B) Create a detailed narrative of the organization's description of operations
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C) Identify the attributes and primary keys that adequately describe the entities.
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D) Identify the business rules based on the description of operations.
Pregunta 37
Pregunta
37. If Tiny College had some departments that were classified as “research only,” they would not offer courses; therefore, the COURSE entity would be ____ to the DEPARTMENT entity
Respuesta
-
A) existence-dependent
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B) independent
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C) weak
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D) optional
Pregunta 38
Pregunta
38. The M:N relationship between STUDENT and CLASS must be divided into two 1:M relationships through the use of the ENROLL entity; the ENROLL entity is ____.
Respuesta
-
A) weak
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B) strong
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C) optional
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D) mandatory
Pregunta 39
Pregunta
39. If the focus is on data-retrieval speed, you might also be forced to include ____ attributes in the design, which would not ordinarily be done.
Respuesta
-
A) multivalued
-
B) composite
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C) weak
-
D) derived
Pregunta 40
Pregunta
40. Complex ____ requirements may dictate data transformations, and they may
expand the number of entities and attributes within the design.
Respuesta
-
A) information
-
B) entity
-
C) design
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D) processing
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