The attribute on the left-hand side of the arrow in a functional dependency is the:
primary key.
determinant.
foreign key.
candidate key.
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homonym
answer
An attribute that may have more than one meaning is called a(n):
alias.
synonym.
double defined attribute.
homonym.
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synonyms
answer
Two or more attributes having different names but the same meaning are called:
alternate attributes.
synonyms.
homonyms.
aliases.
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composite key
answer
A primary key that consists of more than one attribute is called a:
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transitive dependency
answer
A functional dependency between two or more nonkey attributes is called a:
partial transitive dependency.
transitive dependency.
partial functional dependency.
partial nonkey dependency.
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Strong entity/weak entity
answer
In the figure below, what type of relationship do the relations depict?
Strong entity/weak entity
Composite foreign key
One-to-many
Multivalued
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partial functional
answer
A functional dependency in which one or more nonkey attributes are functionally dependent on part, but not all, of the primary key is called a ________ dependency.
merged relation
cross key
partial functional
partial key-based
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no primary key attribute can be null.
answer
The entity integrity rule states that:
a primary key must have only one attribute.
each entity must have a primary key.
no primary key attribute can be null.
referential integrity must be maintained across all entities.
question
entity integrity rule
answer
The ________ states that no primary key attribute may be null.
range domain rule
referential integrity constraint
entity integrity rule
partial specialization rule
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One-to-many
answer
In the figure below, what type of relationship do the relations depict?
Ternary
Strong entity/weak entity
One-to-many
Many-to-many
question
Boyce-Codd normal form.
answer
The normal form which removes any remaining functional dependencies because there was more than one primary key for the same nonkeys is called:
Boyce-Codd normal form.
fourth normal form.
fifth normal form.
sixth normal form.
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Sam Hinz
answer
Which of the following violates the atomic property of relations?
Hinz
Sam
Atomic
Sam Hinz
question
fourth normal form
answer
The normal form which deals with multivalued dependencies is called:
fifth normal form.
fourth normal form.
sixth normal form.
Boyce-Codd normal form.
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Sample data can reverse database implementation errors.
answer
Which of the following is NOT a reason to create an instance of a relational schema with sample data?
Sample data provide a convenient way to check the accuracy of your design.
Sample data can be used for prototype generation.
Sample data can reverse database implementation errors.
Sample data can be used to improve user communications.
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one must be able to check the output of a CASE tool.
answer
Understanding the steps involved in transforming EER diagrams into relations is important because:
there are rarely legitimate alternatives from which to choose.
CASE tools can model any situation.
CASE tools model hypothetical business problems.
one must be able to check the output of a CASE tool.
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well-structured.
answer
A relation that contains minimal redundancy and allows easy use is considered to be:
complex.
well-structured.
clean.
simple.
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No two rows in a relation are identical.
answer
Which of the following are properties of relations?
No two rows in a relation are identical.
All columns are numeric.
Each attribute has the same name.
There are multivalued attributes in a relation.
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Composite
answer
In the figure below, Customer_ID in the CUSTOMER Table is which type of key?
Grouped
Candidate
Composite
Standard
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create table
answer
In the SQL language, the ________ statement is used to make table definitions.
create table
select
create index
create session
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Physical
answer
________ database specification indicates all the parameters for data storage that are then input to database implementation.
Conceptual
Physical
Schematic
Logical
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Second
answer
A relation that contains no multivalued attributes and has nonkey attributes solely dependent on the primary key but contains transitive dependencies is in which normal form?
First
Second
Third
Fourth
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A one-to-many relationship
answer
In the figure below, what is depicted?
A one-to-one relationship
A one-to-many relationship
A unary relationship
An associative entity
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primary key.
answer
An attribute (or attributes) that uniquely identifies each row in a relation is called a:
primary key.
duplicate key.
column.
foreign field.
question
Composite
answer
In the figure below, the primary key for "Order Line" is which type of key?
Standard
Foreign
Grouped
Composite
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relation
answer
A two-dimensional table of data sometimes is called a:
set.
declaration.
relation.
group.
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maximize storage space
answer
All of the following are the main goals of normalization EXCEPT:
simplify the enforcement of referential integrity.
maximize storage space.
minimize data redundancy.
make it easier to maintain data.
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Data integrity
answer
________ is a component of the relational data model included to specify business rules to maintain the integrity of data when they are manipulated.
Data integrity
Business integrity
Business rule constraint
Data structure
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the key must indicate the row's position in the table.
answer
A candidate key must satisfy all of the following conditions EXCEPT:
the key must uniquely identify the row.
the key must indicate the row's position in the table.
the key must be nonredundant.
each nonkey attribute is functionally dependent upon it.
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integrity constraints
answer
A domain definition consists of all of the following components EXCEPT:
domain name.
integrity constraints.
size.
data type.
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alias
answer
An alternative name for an attribute is called a(n):
synonym.
alias.
related characteristic.
alternate attribute.
question
foreign attribute.
answer
An attribute in a relation of a database that serves as the primary key of another relation in the same database is called a:
link key.
foreign attribute.
foreign key.
link attribute.
question
functional dependency.
answer
A constraint between two attributes is called a(n):
functional relation constraint.
functional dependency.
functional relation.
attribute dependency.
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Ternary
answer
The figure below is an example of mapping which type of relationship?
Second
Ternary
Unary
First
question
Deletion
answer
________ problems are encountered when removing data with transitive dependencies.
Modification
Insertion
Merging
Deletion
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referential integrity constraint
answer
A rule that states that each foreign key value must match a primary key value in the other relation is called the:
key match rule.
foreign/primary match rule.
entity key group rule.
referential integrity constraint.
question
Recursive foreign
answer
In the figure below, what type of key is depicted?
Primary
Composite
Recursive foreign
Recursive primary
question
merge
answer
The need to ________ relations commonly occurs when different views need to be integrated.
system
merge
drop
metadata
question
tables
answer
Data is represented in the form of:
data trees.
data notes.
tables.
chairs.
question
Modification
answer
________ are anomalies that can be caused by editing data in tables.
Deletion
Modification
Creation
Insertion
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logical specifications
answer
A form of database specification which maps conceptual requirements is called:
security specifications.
logical specifications.
physical specifications.
response specifications.
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create two new relations, one containing the multivalued attribute.
answer
When a regular entity type contains a multivalued attribute, one must:
create two new relations, one containing the multivalued attribute.
create two new relations, both containing the multivalued attribute.
create a single relation with multiple lines for each instance of the multivalued attribute.
delete the relation and start over.
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first normal form
answer
When all multivalued attributes have been removed from a relation, it is said to be in:
Boyce-Codd normal form.
second normal form.
third normal form.
first normal form.
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enterprise key
answer
A primary key whose value is unique across all relations is called a(n):
global primary key.
inter-table primary key.
foreign global key.
enterprise key.
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A component is always used in only one item.
answer
Referring to the figure below, which of the following is NOT true?
A component can be part of an item.
A component may be used in many items.
A component is always used in only one item.
A component is part of an item.
question
descriptor
answer
A nonkey attribute is also called a(n):
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