WGU - D426 Objective Assessment Exam
Question & Answers ( LATEST Verified
solution )
Database Application - CORRECT ANSWERS ✔✔Software that helps
business users interact with database systems.
Database Administrator - CORRECT ANSWERS ✔✔Responsible for
securing the database system against unauthorized users. A database
administrator enforces procedures for user access and database system
availability.
Authorization - CORRECT ANSWERS ✔✔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 - CORRECT ANSWERS ✔✔Database systems ensure data is
consistent with structural and business rules.
Query Processor - CORRECT ANSWERS ✔✔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 - CORRECT ANSWERS ✔✔Translates the query
processor instructions into low-level file-system commands that modify
,WGU - D426 Objective Assessment Exam
Question & Answers ( LATEST Verified
solution )
or retrieve data. Database sizes range from megabytes to many
terabytes, so the storage manager uses indexes to quickly locate data.
Transaction Manager - CORRECT ANSWERS ✔✔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 - CORRECT ANSWERS ✔✔Data about the database, such
as column names and the number of rows in each table.
Relational Database - CORRECT ANSWERS ✔✔Stores data in tables,
columns, and rows, similar to a spreadsheet.
Relational Database - CORRECT ANSWERS ✔✔All _________
________ systems support the SQL query language.
Relational Database - CORRECT ANSWERS ✔✔Relational systems
are ideal for databases that require an accurate record of every
transaction, such as banking, airline reservation systems, and student
records.
, WGU - D426 Objective Assessment Exam
Question & Answers ( LATEST Verified
solution )
MongoDB (NoSQL) - CORRECT ANSWERS ✔✔The newer non-
relational systems are called NoSQL, for 'not only SQL', and are
optimized for big data.
SQL Statements - CORRECT ANSWERS ✔✔INSERT inserts rows into
a table.
SELECT retrieves data from a table.
UPDATE modifies data in a table.
DELETE deletes rows from a table.
CREATE TABLE (Statement) - CORRECT ANSWERS ✔✔A statement
that creates a new table by specifying the table and column names.
Each column is assigned a data type that indicates the format of column
values. Data types can be numeric, textual, or complex.
Data Type - CORRECT ANSWERS ✔✔INT stores integer values.
DECIMAL stores fractional numeric values.
VARCHAR stores textual values.
DATE stores year, month, and day.
Database Design - CORRECT ANSWERS ✔✔Analysis
Question & Answers ( LATEST Verified
solution )
Database Application - CORRECT ANSWERS ✔✔Software that helps
business users interact with database systems.
Database Administrator - CORRECT ANSWERS ✔✔Responsible for
securing the database system against unauthorized users. A database
administrator enforces procedures for user access and database system
availability.
Authorization - CORRECT ANSWERS ✔✔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 - CORRECT ANSWERS ✔✔Database systems ensure data is
consistent with structural and business rules.
Query Processor - CORRECT ANSWERS ✔✔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 - CORRECT ANSWERS ✔✔Translates the query
processor instructions into low-level file-system commands that modify
,WGU - D426 Objective Assessment Exam
Question & Answers ( LATEST Verified
solution )
or retrieve data. Database sizes range from megabytes to many
terabytes, so the storage manager uses indexes to quickly locate data.
Transaction Manager - CORRECT ANSWERS ✔✔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 - CORRECT ANSWERS ✔✔Data about the database, such
as column names and the number of rows in each table.
Relational Database - CORRECT ANSWERS ✔✔Stores data in tables,
columns, and rows, similar to a spreadsheet.
Relational Database - CORRECT ANSWERS ✔✔All _________
________ systems support the SQL query language.
Relational Database - CORRECT ANSWERS ✔✔Relational systems
are ideal for databases that require an accurate record of every
transaction, such as banking, airline reservation systems, and student
records.
, WGU - D426 Objective Assessment Exam
Question & Answers ( LATEST Verified
solution )
MongoDB (NoSQL) - CORRECT ANSWERS ✔✔The newer non-
relational systems are called NoSQL, for 'not only SQL', and are
optimized for big data.
SQL Statements - CORRECT ANSWERS ✔✔INSERT inserts rows into
a table.
SELECT retrieves data from a table.
UPDATE modifies data in a table.
DELETE deletes rows from a table.
CREATE TABLE (Statement) - CORRECT ANSWERS ✔✔A statement
that creates a new table by specifying the table and column names.
Each column is assigned a data type that indicates the format of column
values. Data types can be numeric, textual, or complex.
Data Type - CORRECT ANSWERS ✔✔INT stores integer values.
DECIMAL stores fractional numeric values.
VARCHAR stores textual values.
DATE stores year, month, and day.
Database Design - CORRECT ANSWERS ✔✔Analysis
