1
WGU - D426: Objective Assessment|
most recent |COMPLETE MOST TESTED
QUESTIONS AND VERIFIED ANSWERS |
(100% correct solutions)|GET IT A+
RIGHT!!
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.
,2
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.
, 3
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
WGU - D426: Objective Assessment|
most recent |COMPLETE MOST TESTED
QUESTIONS AND VERIFIED ANSWERS |
(100% correct solutions)|GET IT A+
RIGHT!!
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.
,2
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.
, 3
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
