Data Management - Foundations - D426 WGU Questions and Correct Answers the Latest Update
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Course
Data Management
Institution
Data Management
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...
✓ 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.
✓ 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
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