7/6/25, 12:41 PM WGU D426
WGU - D426: Objective Assessment CTUAL EXAM
QUESTIONS AND CORRECT DEATAILED ANSWERS WITH
RATIONALES (VERIFIED ANSWERS) |ALREADY GRADED
A+||BRAND NEW!!
A statement that creates a new table by specifying the table and
CREATE TABLE (Statement) column names. Each column is assigned a data type that indicates
the format of column values. Data types can be numeric, textual,
or complex.
INT stores integer values.
DECIMAL stores fractional numeric values. VARCHAR stores textual
Data Type values.
DATE stores year, month, and day.
Analysis Logical design Physical design
Database Design
Database Application Software that helps business users interact with database systems.
Responsible for securing the database system against
Database Administrator unauthorized users. A database administrator enforces
procedures for user access and database system
availability.
/ 1/15
, 7/6/25, 1:03 PM WGU - D426: Objective Assessment
Many database users should have limited access to
Authorization
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.
Interprets queries, creates a plan to modify the
Query Processor 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.
Translates the query processor instructions into low-
Storage Manager 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.
Ensures transactions are properly executed. The
Transaction Manager 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.
Data about the database, such as column names and the
Metadata
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 systems are ideal for databases that require
Relational Database
an accurate record of every transaction, such as
banking, airline reservation systems, and student
records.
The newer non-relational systems are called NoSQL, for
MongoDB (NoSQL)
'not only SQL', and are optimized for big data.
INSERT inserts rows into a
table. SELECT retrieves
SQL Statements
data from a table. UPDATE
modifies data in a table.
DELETE deletes rows from
2/1
5
WGU - D426: Objective Assessment CTUAL EXAM
QUESTIONS AND CORRECT DEATAILED ANSWERS WITH
RATIONALES (VERIFIED ANSWERS) |ALREADY GRADED
A+||BRAND NEW!!
A statement that creates a new table by specifying the table and
CREATE TABLE (Statement) column names. Each column is assigned a data type that indicates
the format of column values. Data types can be numeric, textual,
or complex.
INT stores integer values.
DECIMAL stores fractional numeric values. VARCHAR stores textual
Data Type values.
DATE stores year, month, and day.
Analysis Logical design Physical design
Database Design
Database Application Software that helps business users interact with database systems.
Responsible for securing the database system against
Database Administrator unauthorized users. A database administrator enforces
procedures for user access and database system
availability.
/ 1/15
, 7/6/25, 1:03 PM WGU - D426: Objective Assessment
Many database users should have limited access to
Authorization
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.
Interprets queries, creates a plan to modify the
Query Processor 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.
Translates the query processor instructions into low-
Storage Manager 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.
Ensures transactions are properly executed. The
Transaction Manager 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.
Data about the database, such as column names and the
Metadata
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 systems are ideal for databases that require
Relational Database
an accurate record of every transaction, such as
banking, airline reservation systems, and student
records.
The newer non-relational systems are called NoSQL, for
MongoDB (NoSQL)
'not only SQL', and are optimized for big data.
INSERT inserts rows into a
table. SELECT retrieves
SQL Statements
data from a table. UPDATE
modifies data in a table.
DELETE deletes rows from
2/1
5
