WGU - D426: Objective Assessment | 151 Actual Questions And Answers
2026|2027
1. Database Appli- Software that helps business users interact with database systems.
cation
2. Database Admin- Responsible for securing the database system against unauthorized users. A
istrator database administrator enforces procedures for user access and database system
availability.
3. Authorization Many database users should have limited access to specific tables, columns, or
rows of a database. Database systems authorize individual users to access specific
data.
4. Rules Database systems ensure data is consistent with structural and business rules.
5. Query Processor Interprets queries, creates a plan to modify the database or retrieve data, and
returns query results to the application. Performs query optimization to ensure
the most eflcient instructions are executed on the data.
6. Storage Manager Translates the query processor instructions into low-level file-system commands
that modify or retrieve data. Database sizes range from megabytes to many
terabytes, so the storage manager uses indexes to quickly locate data.
7. Transaction Man- Ensures transactions are properly executed. The transaction manager prevents
ager conflicts between concurrent transactions. The transaction manager also restores
the database to a consistent state in the event of a transaction or system failure.
8. Metadata Data about the database, such as column names and the number of rows in each
table.
9. Relational Data- Stores data in tables, columns, and rows, similar to a spreadsheet.
base
10. Relational Data- All systems support the SQL query language.
base
, WGU - D426: Objective Assessment | 151 Actual Questions And Answers
2026|2027
11. Relational Data- Relational systems are ideal for databases that require an accurate record of every
base transaction, such as banking, airline reservation systems, and student records.
12. MongoDB The newer non-relational systems are called NoSQL, for 'not only SQL', and are
(NoSQL) optimized for big data.
13. SQL Statements INSERT inserts rows into a table.
SELECT retrieves data from a table.
UPDATE modifies data in a table.
DELETE deletes rows from a table.
14. CREATE TABLE A statement that creates a new table by specifying the table and column names.
(Statement) Each column is assigned a data type that indicates the format of column values.
Data types can be numeric, textual, or complex.
15. Data Type INT stores integer values.
DECIMAL stores fractional numeric values.
VARCHAR stores textual values.
DATE stores year, month, and day.
16. Database Design Analysis
Logical design
Physical design
17. Analysis Phase, This phase specifies database requirements without regard to a specific database
Conceptual De- system. Requirements are represented as entities, relationships, and attributes.
sign, Entity-Re- An entity is a person, place, activity, or thing. A relationship is a link between
lationship Mod- entities, and an attribute is a descriptive property of an entity.
eling (Database
Design)
18.
2026|2027
1. Database Appli- Software that helps business users interact with database systems.
cation
2. Database Admin- Responsible for securing the database system against unauthorized users. A
istrator database administrator enforces procedures for user access and database system
availability.
3. Authorization Many database users should have limited access to specific tables, columns, or
rows of a database. Database systems authorize individual users to access specific
data.
4. Rules Database systems ensure data is consistent with structural and business rules.
5. Query Processor Interprets queries, creates a plan to modify the database or retrieve data, and
returns query results to the application. Performs query optimization to ensure
the most eflcient instructions are executed on the data.
6. Storage Manager Translates the query processor instructions into low-level file-system commands
that modify or retrieve data. Database sizes range from megabytes to many
terabytes, so the storage manager uses indexes to quickly locate data.
7. Transaction Man- Ensures transactions are properly executed. The transaction manager prevents
ager conflicts between concurrent transactions. The transaction manager also restores
the database to a consistent state in the event of a transaction or system failure.
8. Metadata Data about the database, such as column names and the number of rows in each
table.
9. Relational Data- Stores data in tables, columns, and rows, similar to a spreadsheet.
base
10. Relational Data- All systems support the SQL query language.
base
, WGU - D426: Objective Assessment | 151 Actual Questions And Answers
2026|2027
11. Relational Data- Relational systems are ideal for databases that require an accurate record of every
base transaction, such as banking, airline reservation systems, and student records.
12. MongoDB The newer non-relational systems are called NoSQL, for 'not only SQL', and are
(NoSQL) optimized for big data.
13. SQL Statements INSERT inserts rows into a table.
SELECT retrieves data from a table.
UPDATE modifies data in a table.
DELETE deletes rows from a table.
14. CREATE TABLE A statement that creates a new table by specifying the table and column names.
(Statement) Each column is assigned a data type that indicates the format of column values.
Data types can be numeric, textual, or complex.
15. Data Type INT stores integer values.
DECIMAL stores fractional numeric values.
VARCHAR stores textual values.
DATE stores year, month, and day.
16. Database Design Analysis
Logical design
Physical design
17. Analysis Phase, This phase specifies database requirements without regard to a specific database
Conceptual De- system. Requirements are represented as entities, relationships, and attributes.
sign, Entity-Re- An entity is a person, place, activity, or thing. A relationship is a link between
lationship Mod- entities, and an attribute is a descriptive property of an entity.
eling (Database
Design)
18.
