EMILLECT 2024/2025 ACADEMIC YEAR ©2024 EMILLECT. ALL RIGHTS RESERVED. FIRST PUBLISH OCTOBER 2024.
Data Management - Foundations - D426
WGU Exam Study Guide
Data - Answer✔✔-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 - Answer✔✔-Most common before computers. Audio was recorded as vibrations
impressed on vinyl disks.
Digital Data - Answer✔✔-Most common today. Encoded as 0s and 1s on electronic magnetic
data.
Database - Answer✔✔-A collection of data in structured format. In principle, can be stored on
paper or even clay tablets.
Database System (DBMS) - Answer✔✔-Software that reads and writes in a database.
Query - Answer✔✔-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 - Answer✔✔-Specialized programming language designed specifically for
database systems. Reads and writes data efficiently.
Database Application - Answer✔✔-Software that HELPS business users interact with database
systems.
Page 1/21
,EMILLECT 2024/2025 ACADEMIC YEAR ©2024 EMILLECT. ALL RIGHTS RESERVED. FIRST PUBLISH OCTOBER 2024.
Database Administrator - Answer✔✔-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 - Answer✔✔-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 - Answer✔✔-What role am I?
Develop programs that utilize a database and write applications that combine query languages
and general purpose programming language.
Database User - Answer✔✔-What role am I?
A consumer of data in a database. They request, update, or use stored data to generate reports
or information.
Transaction - Answer✔✔-A group of queries that MUST be completed or rejected as a whole.
Page 2/21
, EMILLECT 2024/2025 ACADEMIC YEAR ©2024 EMILLECT. ALL RIGHTS RESERVED. FIRST PUBLISH OCTOBER 2024.
Architecture - Answer✔✔-Describes the internal components AND the relationships between
components.
Query Processor - Answer✔✔-Interprets queries, creates a plan to modify the database or
retrieve the data, and returns query results to the application. Performs query optimization.
Query Optimization - Answer✔✔-Ensures efficient instructions are executed on the data from
the Query Processor.
Storage Manager - Answer✔✔-Translates the query processor instructions into low-level file-
system commands that modify OR retrieve data. Uses indexes to quickly locate data.
Transaction Manager - Answer✔✔-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 - Answer✔✔-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 - Answer✔✔-A directory of tables, columns, indexes, and
other database objects.
Relational Database - Answer✔✔-Stores data in tables, columns, and rows, SIMILAR to a
spreadsheet. It also supports SQL. Made up of relations.
NoSQL - Answer✔✔-A new generation of DBMS that is NOT based on the traditional relational
database model.
Page 3/21
Data Management - Foundations - D426
WGU Exam Study Guide
Data - Answer✔✔-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 - Answer✔✔-Most common before computers. Audio was recorded as vibrations
impressed on vinyl disks.
Digital Data - Answer✔✔-Most common today. Encoded as 0s and 1s on electronic magnetic
data.
Database - Answer✔✔-A collection of data in structured format. In principle, can be stored on
paper or even clay tablets.
Database System (DBMS) - Answer✔✔-Software that reads and writes in a database.
Query - Answer✔✔-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 - Answer✔✔-Specialized programming language designed specifically for
database systems. Reads and writes data efficiently.
Database Application - Answer✔✔-Software that HELPS business users interact with database
systems.
Page 1/21
,EMILLECT 2024/2025 ACADEMIC YEAR ©2024 EMILLECT. ALL RIGHTS RESERVED. FIRST PUBLISH OCTOBER 2024.
Database Administrator - Answer✔✔-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 - Answer✔✔-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 - Answer✔✔-What role am I?
Develop programs that utilize a database and write applications that combine query languages
and general purpose programming language.
Database User - Answer✔✔-What role am I?
A consumer of data in a database. They request, update, or use stored data to generate reports
or information.
Transaction - Answer✔✔-A group of queries that MUST be completed or rejected as a whole.
Page 2/21
, EMILLECT 2024/2025 ACADEMIC YEAR ©2024 EMILLECT. ALL RIGHTS RESERVED. FIRST PUBLISH OCTOBER 2024.
Architecture - Answer✔✔-Describes the internal components AND the relationships between
components.
Query Processor - Answer✔✔-Interprets queries, creates a plan to modify the database or
retrieve the data, and returns query results to the application. Performs query optimization.
Query Optimization - Answer✔✔-Ensures efficient instructions are executed on the data from
the Query Processor.
Storage Manager - Answer✔✔-Translates the query processor instructions into low-level file-
system commands that modify OR retrieve data. Uses indexes to quickly locate data.
Transaction Manager - Answer✔✔-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 - Answer✔✔-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 - Answer✔✔-A directory of tables, columns, indexes, and
other database objects.
Relational Database - Answer✔✔-Stores data in tables, columns, and rows, SIMILAR to a
spreadsheet. It also supports SQL. Made up of relations.
NoSQL - Answer✔✔-A new generation of DBMS that is NOT based on the traditional relational
database model.
Page 3/21
