WGU - D426: Objective Assessment
ACTUAL EXAM COMPLETE
QUESTIONS AND VERIFIED ANSWERS
UPDATED GRADED A+
Database Application - ANS✔✔-Software that helps business users interact with
database systems.
Database Administrator - ANS✔✔-Responsible for securing the database system
against unauthorized users. A database administrator enforces procedures for user
access and database system availability.
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.
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.
Relational Database - ANS✔✔-All _________ ________ systems support the SQL
query language.
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.
, WGU - D426: Objective Assessment
ACTUAL EXAM COMPLETE
QUESTIONS AND VERIFIED ANSWERS
UPDATED GRADED A+
CREATE TABLE (Statement) - ANS✔✔-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 - ANS✔✔-INT stores integer values.
DECIMAL stores fractional numeric values.
VARCHAR stores textual values.
DATE stores year, month, and day.
Database Design - ANS✔✔-Analysis
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 storage media. Affects
query processing speed but never affects the query result.
Data Independence - ANS✔✔-Allows database designers to tune query performance
without changes to application programs.
Application Programming Interface (API) - ANS✔✔-To simplify the use of SQL with a
general-purpose language, database programs typically use an ____________
_____________ _______________.
MySQL Command-Line Client - ANS✔✔-A text interface included in the MySQL Server
download.
MySQL - ANS✔✔-'World' database, a database that is usually installed with ______.
Error Code - ANS✔✔-MySQL Server returns an _____ ____ and description when an
SQL statement is syntactically incorrect or the database cannot execute the statement.
Database Model - ANS✔✔-Data structures that prescribe how data is organized.
Operations that manipulate data structures.
Rules that govern valid data.
Tuple - ANS✔✔-An ORDERED collection of elements enclosed in parentheses.
Table - ANS✔✔-A _____ has a name, a fixed tuple of columns, and a varying set of
rows.
ACTUAL EXAM COMPLETE
QUESTIONS AND VERIFIED ANSWERS
UPDATED GRADED A+
Database Application - ANS✔✔-Software that helps business users interact with
database systems.
Database Administrator - ANS✔✔-Responsible for securing the database system
against unauthorized users. A database administrator enforces procedures for user
access and database system availability.
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.
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.
Relational Database - ANS✔✔-All _________ ________ systems support the SQL
query language.
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.
, WGU - D426: Objective Assessment
ACTUAL EXAM COMPLETE
QUESTIONS AND VERIFIED ANSWERS
UPDATED GRADED A+
CREATE TABLE (Statement) - ANS✔✔-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 - ANS✔✔-INT stores integer values.
DECIMAL stores fractional numeric values.
VARCHAR stores textual values.
DATE stores year, month, and day.
Database Design - ANS✔✔-Analysis
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 storage media. Affects
query processing speed but never affects the query result.
Data Independence - ANS✔✔-Allows database designers to tune query performance
without changes to application programs.
Application Programming Interface (API) - ANS✔✔-To simplify the use of SQL with a
general-purpose language, database programs typically use an ____________
_____________ _______________.
MySQL Command-Line Client - ANS✔✔-A text interface included in the MySQL Server
download.
MySQL - ANS✔✔-'World' database, a database that is usually installed with ______.
Error Code - ANS✔✔-MySQL Server returns an _____ ____ and description when an
SQL statement is syntactically incorrect or the database cannot execute the statement.
Database Model - ANS✔✔-Data structures that prescribe how data is organized.
Operations that manipulate data structures.
Rules that govern valid data.
Tuple - ANS✔✔-An ORDERED collection of elements enclosed in parentheses.
Table - ANS✔✔-A _____ has a name, a fixed tuple of columns, and a varying set of
rows.
