Western Governors University D 322
WGU - D426: Objective
Assessment EXAM
QUESTIONS AND
VERIFIED CORRECT
ANSWERS JUST
RELEASED.
,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.
Relational Database Stores data in tables, columns, and rows, similar to a
spreadsheet.
Relational Database All_____________systems support the SQL query language.
Relational Database Relational systems are ideal for databases that
require an accurate record of every transaction, such
as banking, airline reservation systems, and student
records.
MongoDB (NoSQL) The newer non-relational systems are called NoSQL,
for 'not only SQL', and are optimized for big data.
, SQL Statements INSERT inserts rows into a table.
SELECT retrieves data from a table.
UPDATE modifies data in a table.
DELETE deletes rows from a table.
WGU - D426: Objective
Assessment EXAM
QUESTIONS AND
VERIFIED CORRECT
ANSWERS JUST
RELEASED.
,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.
Relational Database Stores data in tables, columns, and rows, similar to a
spreadsheet.
Relational Database All_____________systems support the SQL query language.
Relational Database Relational systems are ideal for databases that
require an accurate record of every transaction, such
as banking, airline reservation systems, and student
records.
MongoDB (NoSQL) The newer non-relational systems are called NoSQL,
for 'not only SQL', and are optimized for big data.
, SQL Statements INSERT inserts rows into a table.
SELECT retrieves data from a table.
UPDATE modifies data in a table.
DELETE deletes rows from a table.
