WGU - D426: Objective Assessment | Exam
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2027 (Rated A+)
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Practice questions for this set
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Any join that selects unmatched rows, including left, right, and full joins.
Choose an answer
1 OUTER JOIN 2 Database Application
3 SQL Statements 4 Query Processor
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Terms in this set (151)
Database Application Software that helps business users interact with
database systems.
, Database Administrator Responsible for securing the database system
against unauthorized users. A database
administrator enforces procedures for user
access and database system availability.
Authorization 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.
Rules Database systems ensure data is consistent with
structural and business rules.
Query Processor 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
instructions are executed on the data.
Storage Manager 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.
Transaction 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.
Metadata Data about the database, such as column names
and the number of rows in each table.
Questions& Expertly Verified Answers | 2026 |
2027 (Rated A+)
Save
Practice questions for this set
Learn 1 /7 Study with Learn
Any join that selects unmatched rows, including left, right, and full joins.
Choose an answer
1 OUTER JOIN 2 Database Application
3 SQL Statements 4 Query Processor
Don't know?
Terms in this set (151)
Database Application Software that helps business users interact with
database systems.
, Database Administrator Responsible for securing the database system
against unauthorized users. A database
administrator enforces procedures for user
access and database system availability.
Authorization 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.
Rules Database systems ensure data is consistent with
structural and business rules.
Query Processor 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
instructions are executed on the data.
Storage Manager 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.
Transaction 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.
Metadata Data about the database, such as column names
and the number of rows in each table.
