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BCIS 4610 Question and answer already passed 2024 BCIS 4610, Exam 2, CH 8-14, Dr. Koh, Spring . Class Quizzes & PPTX Conservation of inputs and outputs to a data flow diagram process when that process is decomposed to a lower level is referred to as _______. Balancing Which of the followin...

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  • September 3, 2024
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BCIS 4610, Exam 2, CH 8-14, Dr. Koh,
Spring . Class Quizzes & PPTX
Conservation of inputs and outputs to a data flow diagram process when that
process is decomposed to a lower level is referred to as _______.
Balancing




Which of the following is not proper rule that governs DFD?


A No process can have only outputs.
B Data cannot move in two opposite directions between two processes.
C Data cannot move directly from one data store to another data store.
D Data cannot move directly from an outside source to a data store.
D Data cannot move directly from an outside source to a data store.




In the ER model, a person, place, object, event or concept in the user
environment about which data is to be maintained is called a(n) _______.
Entity




In the ER model, a named property or characteristic of an entity that is of
interest to the
organization is referred to as a(n) _______.
Attribute

,The number of entity types that participate in a relationship is referred to as
the _______.


A cardinality
B attribute
C degree
D multiplicity
C. Degree




In a data model for a hospital, a patient is described either as an outpatient or
a resident patient. In this model the patient represents a _______.


A super-type
B sub-type
C hierarchical type
D relational type
B. Sub-type




The _______ is the set of all data types and values that an attribute can
assume.


A attribute type
B cardinality
C variable

,D domain
D. Domains




Which of the following is NOT a property of relations in the relational database
model?


A. Entities in cells are simple.
B. Entries in columns are from the same set of values.
C. Each row is unique.
D. The sequence of the rows cannot be changed.
D. The sequence of the rows cannot be changed.




__________ is the process of converting complex data structures into simple,
stable data structures.
A. Decomposition
B. Normalization
C. Rationalization
D. Simplification
B. Normalization




A relation is in ______ when there are no partical and transitive functional
dependencies.
A. zero normal form (0NF)
B. first normal form (1NF)

, C. second normal form (2NF)
D. third normal form (3NF)
D. third normal form (3NF)




A _____ is an attribute that appears as a nonprimary key attribute in one
relation and as the primary key attribute in another relation.
A. candidate key
B. foreign key
C. secondary key
D. relational key
B. foreign key




____ is an integrity constraint specifying that the value of an attribute in one
relation depends on the value of the same attribute in another relation.
A. Referential integrity
B. Cascade integrity
C. Normal integrity
D. Transfer integrity
A. Referential integrity




The primary key in a relation must satisfy that ______.
A. the value of the key must uniquely identify every row in the relation
B. it must be made of a single attribute

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