WGU - D426: OBJECTIVE ASSESSMENT | NEW 2026
UPDATE | QUESTIONS AND ANSWERS | PASSED ON
FIRST ATTEMPT | WITH COMPLETE SOLUTION!!
Database Application Answer - Software that helps business users interact with
database systems.
Database Administrator Answer - Responsible for securing the database
system against unauthorized users. A database administrator enforces
procedures for user access and database system availability.
Authorization Answer - 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 Answer - Database systems ensure data is consistent with structural and
business rules.
Query Processor Answer - 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 Answer - 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 Answer - 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 Answer - Data about the database, such as column names and the
number of rows in each table.
Relational Database Answer - Stores data in tables, columns, and rows, similar
to a spreadsheet.
Relational Database Answer - All _________ ________ systems support the
SQL query language.
Relational Database Answer - 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) Answer - The newer non-relational systems are called
NoSQL, for 'not only SQL', and are optimized for big data.
SQL Statements Answer - 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) Answer - 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 Answer - INT stores integer values.
DECIMAL stores fractional numeric values.
VARCHAR stores textual values.
DATE stores year, month, and day.
Database Design Answer - Analysis
Logical design
Physical design
Analysis Phase, Conceptual Design, Entity-Relationship Modeling (Database
Design) Answer - 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) Answer - 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 Answer - Specifies indexes, table structures, and partitions.
This phase adds indexes and specifies how tables are organized on storage
media. Affects query processing speed but never affects the query result.
UPDATE | QUESTIONS AND ANSWERS | PASSED ON
FIRST ATTEMPT | WITH COMPLETE SOLUTION!!
Database Application Answer - Software that helps business users interact with
database systems.
Database Administrator Answer - Responsible for securing the database
system against unauthorized users. A database administrator enforces
procedures for user access and database system availability.
Authorization Answer - 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 Answer - Database systems ensure data is consistent with structural and
business rules.
Query Processor Answer - 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 Answer - 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 Answer - 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 Answer - Data about the database, such as column names and the
number of rows in each table.
Relational Database Answer - Stores data in tables, columns, and rows, similar
to a spreadsheet.
Relational Database Answer - All _________ ________ systems support the
SQL query language.
Relational Database Answer - 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) Answer - The newer non-relational systems are called
NoSQL, for 'not only SQL', and are optimized for big data.
SQL Statements Answer - 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) Answer - 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 Answer - INT stores integer values.
DECIMAL stores fractional numeric values.
VARCHAR stores textual values.
DATE stores year, month, and day.
Database Design Answer - Analysis
Logical design
Physical design
Analysis Phase, Conceptual Design, Entity-Relationship Modeling (Database
Design) Answer - 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) Answer - 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 Answer - Specifies indexes, table structures, and partitions.
This phase adds indexes and specifies how tables are organized on storage
media. Affects query processing speed but never affects the query result.
