DATA MANAGEMENT - FOUNDATIONS -
D426 WGU EXAM QUESTIONS AND
ANSWERS | 2026 UPDATE | 100%
CORRECT.
Data - ANS Numeric, textual, visual, or audio information that describes real-world systems. It
is collected and processed to aid in a variety of tasks.
Analog Data - ANS Most common before computers. Audio was recorded as vibrations
impressed on vinyl disks.
Digital Data - ANS Most common today. Encoded as 0s and 1s on electronic magnetic data.
Database - ANS A collection of data in structured format. In principle, can be stored on paper
or even clay tablets.
Database System (DBMS) - ANS Software that reads and writes in a database.
Query - ANS A request to retrieve or change data in a database. Typically inserts new data,
retrieves data, updates, data, or deletes data from a database.
Query Language - ANS Specialized programming language designed specifically for database
systems. Reads and writes data efficiently.
@COPYRIGHT ALL RIGHTS RESERVED PAGE 1 OF 19
,Database Application - ANS Software that HELPS business users interact with database
systems.
Database Administrator - ANS What role am I?
Responsible for securing the database system against unauthorized users. They enforce
procedures for user access and database system availability.
Database Designer - ANS What role am I?
Determines the format of each data element AND the overall database STRUCTURE. Must
balance priorities like including storage, response time, and support for rules that govern the
data.
Database Programmer - ANS What role am I?
Develop programs that utilize a database and write applications that combine query languages
and general purpose programming language.
Database User - ANS What role am I?
A consumer of data in a database. They request, update, or use stored data to generate reports
or information.
Transaction - ANS A group of queries that MUST be completed or rejected as a whole.
Architecture - ANS Describes the internal components AND the relationships between
components.
Query Processor - ANS Interprets queries, creates a plan to modify the database or retrieve
the data, and returns query results to the application. Performs query optimization.
@COPYRIGHT ALL RIGHTS RESERVED PAGE 2 OF 19
, Query Optimization - ANS Ensures efficient instructions are executed on the data from the
Query Processor.
Storage Manager - ANS Translates the query processor instructions into low-level file-system
commands that modify OR retrieve data. Uses indexes to quickly locate data.
Transaction Manager - ANS Ensures transactions are properly executed. Prevents conflicts
between concurrent transactions. Also restores the database to a consistent state in the event
of a failure.
Log - ANS A file containing a complete record of ALL inserts, updates, and deletes processed
by the database. The records can be used to restore a database.
Catalog/Data Dictionary/Repository - ANS A directory of tables, columns, indexes, and other
database objects.
Relational Database - ANS Stores data in tables, columns, and rows, SIMILAR to a
spreadsheet. It also supports SQL. Made up of relations.
NoSQL - ANS A new generation of DBMS that is NOT based on the traditional relational
database model.
CRUD - ANS Acronym for actions that can be performed by a query.
SQL Statement - ANS A database command such as a query that inserts, retrieves, updates,
or deletes data. Composed of one or more clauses.
INSERT - ANS Inserts rows into a table.
SELECT - ANS Retrieves data from a table.
@COPYRIGHT ALL RIGHTS RESERVED PAGE 3 OF 19
D426 WGU EXAM QUESTIONS AND
ANSWERS | 2026 UPDATE | 100%
CORRECT.
Data - ANS Numeric, textual, visual, or audio information that describes real-world systems. It
is collected and processed to aid in a variety of tasks.
Analog Data - ANS Most common before computers. Audio was recorded as vibrations
impressed on vinyl disks.
Digital Data - ANS Most common today. Encoded as 0s and 1s on electronic magnetic data.
Database - ANS A collection of data in structured format. In principle, can be stored on paper
or even clay tablets.
Database System (DBMS) - ANS Software that reads and writes in a database.
Query - ANS A request to retrieve or change data in a database. Typically inserts new data,
retrieves data, updates, data, or deletes data from a database.
Query Language - ANS Specialized programming language designed specifically for database
systems. Reads and writes data efficiently.
@COPYRIGHT ALL RIGHTS RESERVED PAGE 1 OF 19
,Database Application - ANS Software that HELPS business users interact with database
systems.
Database Administrator - ANS What role am I?
Responsible for securing the database system against unauthorized users. They enforce
procedures for user access and database system availability.
Database Designer - ANS What role am I?
Determines the format of each data element AND the overall database STRUCTURE. Must
balance priorities like including storage, response time, and support for rules that govern the
data.
Database Programmer - ANS What role am I?
Develop programs that utilize a database and write applications that combine query languages
and general purpose programming language.
Database User - ANS What role am I?
A consumer of data in a database. They request, update, or use stored data to generate reports
or information.
Transaction - ANS A group of queries that MUST be completed or rejected as a whole.
Architecture - ANS Describes the internal components AND the relationships between
components.
Query Processor - ANS Interprets queries, creates a plan to modify the database or retrieve
the data, and returns query results to the application. Performs query optimization.
@COPYRIGHT ALL RIGHTS RESERVED PAGE 2 OF 19
, Query Optimization - ANS Ensures efficient instructions are executed on the data from the
Query Processor.
Storage Manager - ANS Translates the query processor instructions into low-level file-system
commands that modify OR retrieve data. Uses indexes to quickly locate data.
Transaction Manager - ANS Ensures transactions are properly executed. Prevents conflicts
between concurrent transactions. Also restores the database to a consistent state in the event
of a failure.
Log - ANS A file containing a complete record of ALL inserts, updates, and deletes processed
by the database. The records can be used to restore a database.
Catalog/Data Dictionary/Repository - ANS A directory of tables, columns, indexes, and other
database objects.
Relational Database - ANS Stores data in tables, columns, and rows, SIMILAR to a
spreadsheet. It also supports SQL. Made up of relations.
NoSQL - ANS A new generation of DBMS that is NOT based on the traditional relational
database model.
CRUD - ANS Acronym for actions that can be performed by a query.
SQL Statement - ANS A database command such as a query that inserts, retrieves, updates,
or deletes data. Composed of one or more clauses.
INSERT - ANS Inserts rows into a table.
SELECT - ANS Retrieves data from a table.
@COPYRIGHT ALL RIGHTS RESERVED PAGE 3 OF 19
