WGU C175-D426 DATA MANAGEMENT OA EXAM 2025
ACTUAL EXAM 2 LATEST VERSIONS 400 MOST TESTED
QUESTIONS AND CORRECT DETAILED ANSWERS
WITH RATIONALES CORRECT AND VERIFIED ANSWERS)
ALREADY GRADED A+ | ASSURED SUCCESS !!
Data Integrity Management - ANSWER-Functions performed
by the DBMS to
guarantee integrity and consistency of the data
in a database
Data Storage Management - ANSWER-Functions performed
by the DBMS to
guarantee integrity and consistency of the data
in a database
Documentation - ANSWER-not only helps database designers
to stay on track
during the design process, it also enables them to pick up
the design thread
when the time comes to modify the
design.
,participation - ANSWER-Failure to understand the distinction
between mandatory
and optional _ _ in relationships might yield designs in which
awkward (and
unnecessary) temporary rows (entity instances) must be
created just to
accommodate the creation of
required entities.
rectangle - ANSWER-The Chen notation identifies a weak
entity by using a
double-walled
entity.
optional - ANSWER-Participation is if one entity occurrence
does not require a
corresponding entity occurrence in a particular
relationship.
existence - ANSWER-A weak entity must be dependent.
recursive - ANSWER-If an employee within an EMPLOYEE
entity has a
,relationship with itself, that relationship is known as
a relationship.
ternary - ANSWER-A relationship exists when three entities are
associated.
minimum - ANSWER-When indicating cardinality, the first value
represents the
number of associated
entities.
primary key - ANSWER-The concept of relationship strength is
based on how the
of a related entity is
defined.
single-valued - ANSWER-A person's Social Security
number would be an
example of a(n)
attribute.
dashed line - ANSWER-A derived attribute is indicated in the
Chen notation by a
that connects the attribute and
an entity.
, composite - ANSWER-A attribute can be further subdivided to
yield additional
attributes.
anomalies - ANSWER-A table that displays data redundancies
yields .
4NF (fourth normal form) - ANSWER-In the , no row may
contain two or more
multivalued facts about an
entity.
diagram - ANSWER-Dependencies can be identified with
the help of a
dependency
.
DKNF - ANSWER-Of the following normal forms, is mostly of
theoretical interest.
primary - ANSWER-Because a partial dependency can exist only
when a table's primary key is composed of several attributes, a
table whose key consists of only a single attribute is
automatically in 2NF once it is in 1NF.
ACTUAL EXAM 2 LATEST VERSIONS 400 MOST TESTED
QUESTIONS AND CORRECT DETAILED ANSWERS
WITH RATIONALES CORRECT AND VERIFIED ANSWERS)
ALREADY GRADED A+ | ASSURED SUCCESS !!
Data Integrity Management - ANSWER-Functions performed
by the DBMS to
guarantee integrity and consistency of the data
in a database
Data Storage Management - ANSWER-Functions performed
by the DBMS to
guarantee integrity and consistency of the data
in a database
Documentation - ANSWER-not only helps database designers
to stay on track
during the design process, it also enables them to pick up
the design thread
when the time comes to modify the
design.
,participation - ANSWER-Failure to understand the distinction
between mandatory
and optional _ _ in relationships might yield designs in which
awkward (and
unnecessary) temporary rows (entity instances) must be
created just to
accommodate the creation of
required entities.
rectangle - ANSWER-The Chen notation identifies a weak
entity by using a
double-walled
entity.
optional - ANSWER-Participation is if one entity occurrence
does not require a
corresponding entity occurrence in a particular
relationship.
existence - ANSWER-A weak entity must be dependent.
recursive - ANSWER-If an employee within an EMPLOYEE
entity has a
,relationship with itself, that relationship is known as
a relationship.
ternary - ANSWER-A relationship exists when three entities are
associated.
minimum - ANSWER-When indicating cardinality, the first value
represents the
number of associated
entities.
primary key - ANSWER-The concept of relationship strength is
based on how the
of a related entity is
defined.
single-valued - ANSWER-A person's Social Security
number would be an
example of a(n)
attribute.
dashed line - ANSWER-A derived attribute is indicated in the
Chen notation by a
that connects the attribute and
an entity.
, composite - ANSWER-A attribute can be further subdivided to
yield additional
attributes.
anomalies - ANSWER-A table that displays data redundancies
yields .
4NF (fourth normal form) - ANSWER-In the , no row may
contain two or more
multivalued facts about an
entity.
diagram - ANSWER-Dependencies can be identified with
the help of a
dependency
.
DKNF - ANSWER-Of the following normal forms, is mostly of
theoretical interest.
primary - ANSWER-Because a partial dependency can exist only
when a table's primary key is composed of several attributes, a
table whose key consists of only a single attribute is
automatically in 2NF once it is in 1NF.
