WGU D426 - DATA MANAGEMENT FOUNDATIONS EXAM
2025|170 QUESTIONS WITH ACCURATE SOLUTIONS
1. In a scenario where a database designer is tasked with creating a new
database for a retail company, what should they prioritize before defining
supertype and subtype entities?
Implementing security measures.
Identifying entities.
Designing the user interface.
Choosing the database management system.
2. When a database stores the majority of data in RAM rather than in hard
disks, it is referred to as a(n) database.
Big Data database
In-memory database
Very large database
Cloud database
3. Which of the following describes database design?
collecting the large volume of data produced by digital processes
and devices
converting the data in a database to a format indecipherable to
normal programs
creating the entities, attributes, and relationships between
tables of data
creating a file used to store data about a single entity
,4. What SQL command is used to select specific columns from a table?
UPDATE
, INSERT
SELECT
DELETE
5. What SQL function is used to retrieve the minimum value from a dataset?
MIN()
SUM()
AVG()
MAX()
6. Relational databases have several special joins, a ________ join compares
columns of two table with an operator other than =, such as < and >.
non-equijoin
self-join
equijoin
cross-join
7. The WITH CHECK OPTION is used to ______ _.
make sure there is space within the table
make sure the view is syntactically correct.
make sure rows inserted or updated via the view qualify to
appear in the view.
is not an option with view
8. What is an operand?
Another name for integer.
Another name for number.
, A value that is acted upon by an operator.
One of the arithmetic symbols like *, +, -, and /.
9. If a database table violates the fourth normal form due to multivalued
dependencies, what would be a recommended approach to resolve this
issue?
Redesign the table to ensure that multivalued dependencies are
only on the key.
Remove all attributes that are not part of the key.
Add more foreign keys to the table.
Merge the table with another table to reduce redundancy.
10. Describe the role of a query in the context of database operations.
A query manages the physical storage of data on disk.
A query is used to perform operations such as inserting,
retrieving, updating, or deleting data within a database.
A query is a tool for monitoring database performance.
A query is primarily used for database design and schema
creation.
11. What does the WITH CHECK OPTION do in a database view?
It rejects inserts and updates that do not satisfy the view query
WHERE clause.
It allows all inserts and updates regardless of the view query.
It creates a temporary view for data manipulation.
It automatically updates the view when the underlying table
changes.
12. What is the definition of a database according to the provided text?
2025|170 QUESTIONS WITH ACCURATE SOLUTIONS
1. In a scenario where a database designer is tasked with creating a new
database for a retail company, what should they prioritize before defining
supertype and subtype entities?
Implementing security measures.
Identifying entities.
Designing the user interface.
Choosing the database management system.
2. When a database stores the majority of data in RAM rather than in hard
disks, it is referred to as a(n) database.
Big Data database
In-memory database
Very large database
Cloud database
3. Which of the following describes database design?
collecting the large volume of data produced by digital processes
and devices
converting the data in a database to a format indecipherable to
normal programs
creating the entities, attributes, and relationships between
tables of data
creating a file used to store data about a single entity
,4. What SQL command is used to select specific columns from a table?
UPDATE
, INSERT
SELECT
DELETE
5. What SQL function is used to retrieve the minimum value from a dataset?
MIN()
SUM()
AVG()
MAX()
6. Relational databases have several special joins, a ________ join compares
columns of two table with an operator other than =, such as < and >.
non-equijoin
self-join
equijoin
cross-join
7. The WITH CHECK OPTION is used to ______ _.
make sure there is space within the table
make sure the view is syntactically correct.
make sure rows inserted or updated via the view qualify to
appear in the view.
is not an option with view
8. What is an operand?
Another name for integer.
Another name for number.
, A value that is acted upon by an operator.
One of the arithmetic symbols like *, +, -, and /.
9. If a database table violates the fourth normal form due to multivalued
dependencies, what would be a recommended approach to resolve this
issue?
Redesign the table to ensure that multivalued dependencies are
only on the key.
Remove all attributes that are not part of the key.
Add more foreign keys to the table.
Merge the table with another table to reduce redundancy.
10. Describe the role of a query in the context of database operations.
A query manages the physical storage of data on disk.
A query is used to perform operations such as inserting,
retrieving, updating, or deleting data within a database.
A query is a tool for monitoring database performance.
A query is primarily used for database design and schema
creation.
11. What does the WITH CHECK OPTION do in a database view?
It rejects inserts and updates that do not satisfy the view query
WHERE clause.
It allows all inserts and updates regardless of the view query.
It creates a temporary view for data manipulation.
It automatically updates the view when the underlying table
changes.
12. What is the definition of a database according to the provided text?
