WGU D115 OBJECTIVE FINAL PAPER 2026
QUESTIONS WITH ANSWERS GRADED A+
◉ 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.
QUESTIONS WITH ANSWERS GRADED A+
◉ 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.
