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WGU - D426: Objective Assessment Questions
and Answers (100% Correct Answers) Already
Graded A+
Database Application Ans: Software that helps business users interact
with database systems.
Database Administrator Ans: Responsible for securing the database
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system against unauthorized users. A database administrator enforces
procedures for user access and database system availability.
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Authorization Ans: 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 Ans: Database systems ensure data is consistent with structural
and business rules.
Query Processor Ans: 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 Ans: 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.
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Transaction Manager Ans: 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 Ans: Data about the database, such as column names and
the number of rows in each table.
Relational Database Ans: Stores data in tables, columns, and rows,
similar to a spreadsheet.
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Relational Database Ans: All _________ ________ systems support the SQL
query language.
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Relational Database Ans: 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) Ans: The newer non-relational systems are called
NoSQL, for 'not only SQL', and are optimized for big data.
SQL Statements Ans: 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) Ans: A statement that creates a new table
by specifying the table and column names. Each column is assigned a
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data type that indicates the format of column values. Data types can
be numeric, textual, or complex.
Data Type Ans: INT stores integer values.
DECIMAL stores fractional numeric values.
VARCHAR stores textual values.
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DATE stores year, month, and day.
Database Design Ans: Analysis
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Logical design
Physical design
Analysis Phase, Conceptual Design, Entity-Relationship Modeling
(Database Design) Ans: This phase specifies database requirements
without regard to a specific database system. Requirements are
represented as entities, relationships, and attributes. An entity is a person,
place, activity, or thing. A relationship is a link between entities, and an
attribute is a descriptive property of an entity.
Logical Design (Database Design) Ans: This phase implements database
requirements in a specific database system. For relational database
systems, _________ design converts entities, relationships, and attributes
into tables, keys, and columns.
Physical Design Ans: Specifies indexes, table structures, and partitions.
This phase adds indexes and specifies how tables are organized on
1
WGU - D426: Objective Assessment Questions
and Answers (100% Correct Answers) Already
Graded A+
Database Application Ans: Software that helps business users interact
with database systems.
Database Administrator Ans: Responsible for securing the database
© 2026 Assignment Expert
system against unauthorized users. A database administrator enforces
procedures for user access and database system availability.
Guru01 - Stuvia
Authorization Ans: 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 Ans: Database systems ensure data is consistent with structural
and business rules.
Query Processor Ans: 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 Ans: 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.
,For Expert help and assignment handling,
2
Transaction Manager Ans: 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 Ans: Data about the database, such as column names and
the number of rows in each table.
Relational Database Ans: Stores data in tables, columns, and rows,
similar to a spreadsheet.
© 2026 Assignment Expert
Relational Database Ans: All _________ ________ systems support the SQL
query language.
Guru01 - Stuvia
Relational Database Ans: 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) Ans: The newer non-relational systems are called
NoSQL, for 'not only SQL', and are optimized for big data.
SQL Statements Ans: 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) Ans: A statement that creates a new table
by specifying the table and column names. Each column is assigned a
, For Expert help and assignment handling,
3
data type that indicates the format of column values. Data types can
be numeric, textual, or complex.
Data Type Ans: INT stores integer values.
DECIMAL stores fractional numeric values.
VARCHAR stores textual values.
© 2026 Assignment Expert
DATE stores year, month, and day.
Database Design Ans: Analysis
Guru01 - Stuvia
Logical design
Physical design
Analysis Phase, Conceptual Design, Entity-Relationship Modeling
(Database Design) Ans: This phase specifies database requirements
without regard to a specific database system. Requirements are
represented as entities, relationships, and attributes. An entity is a person,
place, activity, or thing. A relationship is a link between entities, and an
attribute is a descriptive property of an entity.
Logical Design (Database Design) Ans: This phase implements database
requirements in a specific database system. For relational database
systems, _________ design converts entities, relationships, and attributes
into tables, keys, and columns.
Physical Design Ans: Specifies indexes, table structures, and partitions.
This phase adds indexes and specifies how tables are organized on
