|//|\\| 1|P a g e |/|\|| |//|\\| ||//|\\|| |/|\\|| |/|\\||
D426 WGU EXAM 2025 - 2026 UPDATED ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
ACTUAL EXAM WITH CORRECT |//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
SOLUTIONS.
Software that helps business users interact with database systems. - correct ||//|\\|| |//|\\|| ||//|\\|| |//|\\|| |//|\\|| |//|\\|| |//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
answer- Database Application
||//|\\|| ||//|\\|| ||//|\\||
Responsible for securing the database system against unauthorized ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
users. A database administrator enforces procedures for user access and
||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| |//|\\|| |//|\\|| |//|\\|| |//|\\||
database system availability. - correct answer- Database Administrator
||//|\\|| ||//|\\|| |//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
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. - correct answer- ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
Authorization
Database systems ensure data is consistent with structural and business ||//|\\|| ||//|\\|| |//|\\|| |//|\\|| |//|\\|| |//|\\|| |//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
rules. - correct answer- Rules ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
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 efficient ||//|\\|| |//|\\|| |//|\\|| |//|\\|| |//|\\|| |//|\\|| |//|\\||
,|//|\\| 2|P a g e |/|\|| |//|\\| ||//|\\|| |/|\\|| |/|\\||
instructions are executed on the data. - correct answer- Query Processor ||//|\\|| |//|\\|| |//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| |//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
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. - correct answer- Storage Manager ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
Ensures transactions are properly executed. The transaction manager ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
prevents conflicts between concurrent transactions. The transaction ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
manager also restores the database to a consistent state in the event of ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
a transaction or system failure. - correct answer- Transaction Manager
||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
Data about the database, such as column names and the number of
||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| |//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| |//|\\|| |//|\\||
rows in each table. - correct answer- Metadata ||//|\\|| ||//|\\|| |//|\\|| ||//|\\|| |//|\\|| |//|\\|| |//|\\||
Stores data in tables, columns, and rows, similar to a spreadsheet. - correct
||//|\\|| |//|\\|| ||//|\\|| |//|\\|| ||//|\\|| |//|\\|| ||//|\\|| |//|\\|| |//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
answer- Relational Database
||//|\\|| ||//|\\|| ||//|\\||
All systems support the SQL query
||//|\\|| ||//|\\|| |//|\\|| |//|\\|| |//|\\|| ||//|\\||
language. - correct answer- Relational Database ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
, |//|\\| 3|P a g e |/|\|| |//|\\| ||//|\\|| |/|\\|| |/|\\||
Relational systems are ideal for databases that require an accurate ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| |//|\\||
record of every transaction, such as banking, airline reservation systems,
||//|\\|| ||//|\\|| |//|\\|| |//|\\|| |//|\\|| ||//|\\|| |//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
and student records. - correct answer- Relational Database
||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
The newer non-relational systems are called NoSQL, for 'not only SQL',
||//|\\|| |//|\\|| ||//|\\|| |//|\\|| |//|\\|| |//|\\|| |//|\\|| |//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
and are optimized for big data. - correct answer- MongoDB (NoSQL)
||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
INSERT inserts rows into a table. SELECT ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| |//|\\||
retrieves data from a table. UPDATE modifies ||//|\\|| |//|\\|| |//|\\|| |//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
data in a table. ||//|\\|| ||//|\\|| ||//|\\||
DELETE deletes rows from a table. - correct answer- SQL Statements ||//|\\|| ||//|\\|| ||//|\\|| |//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| |//|\\|| |//|\\|| ||//|\\||
A statement that creates a new table by specifying the table and
||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
column names. Each column is assigned a data type that indicates the ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
format of column values. Data types can be numeric, textual, or
||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| |//|\\|| |//|\\|| |//|\\||
complex. - correct answer- CREATE TABLE (Statement) ||//|\\|| |//|\\|| |//|\\|| |//|\\|| |//|\\|| ||//|\\||
INT stores integer values. ||//|\\|| |//|\\|| |//|\\||
D426 WGU EXAM 2025 - 2026 UPDATED ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
ACTUAL EXAM WITH CORRECT |//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
SOLUTIONS.
Software that helps business users interact with database systems. - correct ||//|\\|| |//|\\|| ||//|\\|| |//|\\|| |//|\\|| |//|\\|| |//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
answer- Database Application
||//|\\|| ||//|\\|| ||//|\\||
Responsible for securing the database system against unauthorized ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
users. A database administrator enforces procedures for user access and
||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| |//|\\|| |//|\\|| |//|\\|| |//|\\||
database system availability. - correct answer- Database Administrator
||//|\\|| ||//|\\|| |//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
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. - correct answer- ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
Authorization
Database systems ensure data is consistent with structural and business ||//|\\|| ||//|\\|| |//|\\|| |//|\\|| |//|\\|| |//|\\|| |//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
rules. - correct answer- Rules ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
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 efficient ||//|\\|| |//|\\|| |//|\\|| |//|\\|| |//|\\|| |//|\\|| |//|\\||
,|//|\\| 2|P a g e |/|\|| |//|\\| ||//|\\|| |/|\\|| |/|\\||
instructions are executed on the data. - correct answer- Query Processor ||//|\\|| |//|\\|| |//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| |//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
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. - correct answer- Storage Manager ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
Ensures transactions are properly executed. The transaction manager ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
prevents conflicts between concurrent transactions. The transaction ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
manager also restores the database to a consistent state in the event of ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
a transaction or system failure. - correct answer- Transaction Manager
||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
Data about the database, such as column names and the number of
||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| |//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| |//|\\|| |//|\\||
rows in each table. - correct answer- Metadata ||//|\\|| ||//|\\|| |//|\\|| ||//|\\|| |//|\\|| |//|\\|| |//|\\||
Stores data in tables, columns, and rows, similar to a spreadsheet. - correct
||//|\\|| |//|\\|| ||//|\\|| |//|\\|| ||//|\\|| |//|\\|| ||//|\\|| |//|\\|| |//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
answer- Relational Database
||//|\\|| ||//|\\|| ||//|\\||
All systems support the SQL query
||//|\\|| ||//|\\|| |//|\\|| |//|\\|| |//|\\|| ||//|\\||
language. - correct answer- Relational Database ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
, |//|\\| 3|P a g e |/|\|| |//|\\| ||//|\\|| |/|\\|| |/|\\||
Relational systems are ideal for databases that require an accurate ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| |//|\\||
record of every transaction, such as banking, airline reservation systems,
||//|\\|| ||//|\\|| |//|\\|| |//|\\|| |//|\\|| ||//|\\|| |//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
and student records. - correct answer- Relational Database
||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
The newer non-relational systems are called NoSQL, for 'not only SQL',
||//|\\|| |//|\\|| ||//|\\|| |//|\\|| |//|\\|| |//|\\|| |//|\\|| |//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
and are optimized for big data. - correct answer- MongoDB (NoSQL)
||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
INSERT inserts rows into a table. SELECT ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| |//|\\||
retrieves data from a table. UPDATE modifies ||//|\\|| |//|\\|| |//|\\|| |//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
data in a table. ||//|\\|| ||//|\\|| ||//|\\||
DELETE deletes rows from a table. - correct answer- SQL Statements ||//|\\|| ||//|\\|| ||//|\\|| |//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| |//|\\|| |//|\\|| ||//|\\||
A statement that creates a new table by specifying the table and
||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
column names. Each column is assigned a data type that indicates the ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\||
format of column values. Data types can be numeric, textual, or
||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| ||//|\\|| |//|\\|| |//|\\|| |//|\\||
complex. - correct answer- CREATE TABLE (Statement) ||//|\\|| |//|\\|| |//|\\|| |//|\\|| |//|\\|| ||//|\\||
INT stores integer values. ||//|\\|| |//|\\|| |//|\\||
