WGU C175/D426 DATA MANAGEMENT
FOUNDATIONS OA 2026 UPDATED EXAM|LATEST
VERSION QUESTIONS AND CORRECT VERIFIED
ANSWERS A+ GRADED ASSURED
database system - ANSWER✔️The term refers to an organization of components that define and
regulate the collection, storage, management and use of data within a database environment.
islands of information - ANSWER✔️The term refers to scattered locations storing the same basic
data.
In-memory databases - ANSWER✔️Refer to a type of database that stores most of its data in
RAM rather than in hard disks.
Data independence - ANSWER✔️Exists when it is possible to make changes in the data storage
characteristics without affecting an application program's ability to access data.
hierarchical - ANSWER✔️One of the limitations of the model is that there is a lack of standards.
entity - ANSWER✔️A(n) represents a particular type of object in the real world.
,method - ANSWER✔️In object oriented terms, a(n) defines an object's behavior.
entity relationship - ANSWER✔️The model was developed to allow designers to use a graphical
tool to examine structures rather than describing them with text.
Constraints - ANSWER✔️Are normally expressed in the form of rules.
Name node - ANSWER✔️Which of the following types of HDFS nodes stores all the metadata
about a file system?
relational data model - ANSWER✔️MySQL is an example of the.
object-oriented - ANSWER✔️The data model is said to be a semantic data model.
data model - ANSWER✔️A(n) is a relatively simple representation of more complex real-world
data structures.
file system data model - ANSWER✔️VMS/VSAM is an example of the.
network - ANSWER✔️In the model, the user perceives the database as a collection of records in
1:M relationships, where each record can have more than one parent.
data manipulation language (DML) - ANSWER✔️A(n) defines the environment in which data
can be managed and is used to work with the data in the database.
They are not based on the relational model. - ANSWER✔️Which of the following is true of
NoSQL databases?
Which design type specifies database requirements without regard to a specific database system?
Physical design
Conceptual design
Logical design
Abstract design - ANSWER✔️Conceptual design
Which requirement within large, complex databases ensures users have limited access to the
database?
Recovery
Performance
Authorization
Confidentiality - ANSWER✔️Authorization
3. What characterizes the rules of relational databases?
,-They are logical constraints that ensure the data is valid.
-They are based on business policy and specific databases.
-They represent data volumes and rapidly changing data structures.
-They embody the theoretical foundation of the SQL language. - ANSWER✔️They are logical
constraints that ensure the data is valid.
4. Which event will result in an error code and error description when using MySQL Server?
When the server or updates are incorrectly installed
When an SQL statement is entered to locate errors in the database
When an SQL statement is syntactically incorrect
When a Mac OS shortcut code is used on a Windows OS - ANSWER✔️When an SQL statement
is syntactically incorrect
5. Which data type should be used to store whole integer values, such as age?
NUM
VARCHAR
DATE
INT - ANSWER✔️INT
6. Which text-based interface is included in the MySQL Server Download?
MySQL Command-Line Client
MySQL Workbench
MySQL Enterprise
MySQL Community - ANSWER✔️MySQL Command-Line Client
7. Which database system includes the World database during its installation?
MySQL
MongoDB
Oracle
PostgreSQL - ANSWER✔️MySQL
8. What is the standardized language of relational database systems?
Contextual Query Language
Structured Query Language
Select Query Language
Object Query Language - ANSWER✔️Structured Query Language
38. Which primary key characteristic means it includes information that is easy to type and
store?
, Non-null
Meaningless
Stable
Simple - ANSWER✔️Simple
39. Which part of a junction table in a relational database establishes a many-to-many
relationship between two tables?
Primary key
Foreign key
Composite key
Candidate key - ANSWER✔️Foreign key
40. Which type of relationship is established by a foreign key in a relational database?
Aggregation
Composition
One-to-many
Many-to-many - ANSWER✔️One-to-many
41. Which statements may be rejected when a foreign key constraint is specified?
INSERT
CHECK
SELECT
ORDER BY - ANSWER✔️INSERT
42. Which key describes the unique columns in a table that do not contain a primary key?
Foreign key
Simple key
Candidate key
Composite key - ANSWER✔️Candidate key
43. Which index stores column values and row pointers in a hierarchy?
Dense index
Sparse index
Multi-level index
Secondary index - ANSWER✔️Multi-level index
44. Which type of index refers to entries that are assigned to buckets?
Bitmap index
Logical index
Hash index
FOUNDATIONS OA 2026 UPDATED EXAM|LATEST
VERSION QUESTIONS AND CORRECT VERIFIED
ANSWERS A+ GRADED ASSURED
database system - ANSWER✔️The term refers to an organization of components that define and
regulate the collection, storage, management and use of data within a database environment.
islands of information - ANSWER✔️The term refers to scattered locations storing the same basic
data.
In-memory databases - ANSWER✔️Refer to a type of database that stores most of its data in
RAM rather than in hard disks.
Data independence - ANSWER✔️Exists when it is possible to make changes in the data storage
characteristics without affecting an application program's ability to access data.
hierarchical - ANSWER✔️One of the limitations of the model is that there is a lack of standards.
entity - ANSWER✔️A(n) represents a particular type of object in the real world.
,method - ANSWER✔️In object oriented terms, a(n) defines an object's behavior.
entity relationship - ANSWER✔️The model was developed to allow designers to use a graphical
tool to examine structures rather than describing them with text.
Constraints - ANSWER✔️Are normally expressed in the form of rules.
Name node - ANSWER✔️Which of the following types of HDFS nodes stores all the metadata
about a file system?
relational data model - ANSWER✔️MySQL is an example of the.
object-oriented - ANSWER✔️The data model is said to be a semantic data model.
data model - ANSWER✔️A(n) is a relatively simple representation of more complex real-world
data structures.
file system data model - ANSWER✔️VMS/VSAM is an example of the.
network - ANSWER✔️In the model, the user perceives the database as a collection of records in
1:M relationships, where each record can have more than one parent.
data manipulation language (DML) - ANSWER✔️A(n) defines the environment in which data
can be managed and is used to work with the data in the database.
They are not based on the relational model. - ANSWER✔️Which of the following is true of
NoSQL databases?
Which design type specifies database requirements without regard to a specific database system?
Physical design
Conceptual design
Logical design
Abstract design - ANSWER✔️Conceptual design
Which requirement within large, complex databases ensures users have limited access to the
database?
Recovery
Performance
Authorization
Confidentiality - ANSWER✔️Authorization
3. What characterizes the rules of relational databases?
,-They are logical constraints that ensure the data is valid.
-They are based on business policy and specific databases.
-They represent data volumes and rapidly changing data structures.
-They embody the theoretical foundation of the SQL language. - ANSWER✔️They are logical
constraints that ensure the data is valid.
4. Which event will result in an error code and error description when using MySQL Server?
When the server or updates are incorrectly installed
When an SQL statement is entered to locate errors in the database
When an SQL statement is syntactically incorrect
When a Mac OS shortcut code is used on a Windows OS - ANSWER✔️When an SQL statement
is syntactically incorrect
5. Which data type should be used to store whole integer values, such as age?
NUM
VARCHAR
DATE
INT - ANSWER✔️INT
6. Which text-based interface is included in the MySQL Server Download?
MySQL Command-Line Client
MySQL Workbench
MySQL Enterprise
MySQL Community - ANSWER✔️MySQL Command-Line Client
7. Which database system includes the World database during its installation?
MySQL
MongoDB
Oracle
PostgreSQL - ANSWER✔️MySQL
8. What is the standardized language of relational database systems?
Contextual Query Language
Structured Query Language
Select Query Language
Object Query Language - ANSWER✔️Structured Query Language
38. Which primary key characteristic means it includes information that is easy to type and
store?
, Non-null
Meaningless
Stable
Simple - ANSWER✔️Simple
39. Which part of a junction table in a relational database establishes a many-to-many
relationship between two tables?
Primary key
Foreign key
Composite key
Candidate key - ANSWER✔️Foreign key
40. Which type of relationship is established by a foreign key in a relational database?
Aggregation
Composition
One-to-many
Many-to-many - ANSWER✔️One-to-many
41. Which statements may be rejected when a foreign key constraint is specified?
INSERT
CHECK
SELECT
ORDER BY - ANSWER✔️INSERT
42. Which key describes the unique columns in a table that do not contain a primary key?
Foreign key
Simple key
Candidate key
Composite key - ANSWER✔️Candidate key
43. Which index stores column values and row pointers in a hierarchy?
Dense index
Sparse index
Multi-level index
Secondary index - ANSWER✔️Multi-level index
44. Which type of index refers to entries that are assigned to buckets?
Bitmap index
Logical index
Hash index
