WGU - D426: Objective Assessment || All Answers are Flawless.
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 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.
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
Logical design
, Physical design
Analysis Phase, Conceptual Design, Entity-Relationship Modeling (Database Design) correct
answers 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) correct answers 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 correct answers 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 correct answers Allows database designers to tune query performance
without changes to application programs.
Application Programming Interface (API) correct answers To simplify the use of SQL with a
general-purpose language, database programs typically use an ____________ _____________
_______________.
MySQL Command-Line Client correct answers A text interface included in the MySQL Server
download.
MySQL correct answers 'World' database, a database that is usually installed with ______.
Error Code correct answers MySQL Server returns an _____ ____ and description when an SQL
statement is syntactically incorrect or the database cannot execute the statement.
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 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.
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
Logical design
, Physical design
Analysis Phase, Conceptual Design, Entity-Relationship Modeling (Database Design) correct
answers 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) correct answers 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 correct answers 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 correct answers Allows database designers to tune query performance
without changes to application programs.
Application Programming Interface (API) correct answers To simplify the use of SQL with a
general-purpose language, database programs typically use an ____________ _____________
_______________.
MySQL Command-Line Client correct answers A text interface included in the MySQL Server
download.
MySQL correct answers 'World' database, a database that is usually installed with ______.
Error Code correct answers MySQL Server returns an _____ ____ and description when an SQL
statement is syntactically incorrect or the database cannot execute the statement.
