Data Management - Foundations - D426 WGU
Questions and Correct Answers
Data
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
Most common before computers. Audio was recorded as vibrations impressed on vinyl disks.
Digital Data
Most common today. Encoded as 0s and 1s on electronic magnetic data.
Database
A collection of data in structured format. In principle, can be stored on paper or even clay tablets.
Database System (DBMS)
Software that reads and writes in a database.
Query
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
Specialized programming language designed specifically for database systems. Reads and writes
data efficiently.
,Database Application
Software that HELPS business users interact with database systems.
Database Administrator
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
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
What role am I?
Develop programs that utilize a database and write applications that combine query languages
and general purpose programming language.
Database User
What role am I?
, A consumer of data in a database. They request, update, or use stored data to generate reports or
information.
Transaction
A group of queries that MUST be completed or rejected as a whole.
Architecture
Describes the internal components AND the relationships between components.
Query Processor
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
Ensures efficient instructions are executed on the data from the Query Processor.
Storage Manager
Translates the query processor instructions into low-level file-system commands that modify OR
retrieve data. Uses indexes to quickly locate data.
Transaction Manager
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
Questions and Correct Answers
Data
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
Most common before computers. Audio was recorded as vibrations impressed on vinyl disks.
Digital Data
Most common today. Encoded as 0s and 1s on electronic magnetic data.
Database
A collection of data in structured format. In principle, can be stored on paper or even clay tablets.
Database System (DBMS)
Software that reads and writes in a database.
Query
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
Specialized programming language designed specifically for database systems. Reads and writes
data efficiently.
,Database Application
Software that HELPS business users interact with database systems.
Database Administrator
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
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
What role am I?
Develop programs that utilize a database and write applications that combine query languages
and general purpose programming language.
Database User
What role am I?
, A consumer of data in a database. They request, update, or use stored data to generate reports or
information.
Transaction
A group of queries that MUST be completed or rejected as a whole.
Architecture
Describes the internal components AND the relationships between components.
Query Processor
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
Ensures efficient instructions are executed on the data from the Query Processor.
Storage Manager
Translates the query processor instructions into low-level file-system commands that modify OR
retrieve data. Uses indexes to quickly locate data.
Transaction Manager
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
