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WGU D426 OBJECTIVE ASSESSMENT ACTUAL EXAM GUIDE 2024|BRAND NEW EXAM QUESTIONS AND CORRECT ANSWERS ALL GRADED A+|GUARANTEED SUCCESS|LATEST UPDATE $10.49
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WGU D426 OBJECTIVE ASSESSMENT ACTUAL EXAM GUIDE 2024|BRAND NEW EXAM QUESTIONS AND CORRECT ANSWERS ALL GRADED A+|GUARANTEED SUCCESS|LATEST UPDATE
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WGU D426 OBJECTIVE ASSESSMENT
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WGU D426 OBJECTIVE ASSESSMENT
WGU D426 OBJECTIVE ASSESSMENT ACTUAL EXAM GUIDE 2024|BRAND NEW EXAM QUESTIONS AND CORRECT ANSWERS ALL GRADED A+|GUARANTEED SUCCESS|LATEST UPDATE
Database Application - ANSWER-Software that helps business users interact with database systems.
Database Administrator - ANSWER-Responsible...
WGU D426 OBJECTIVE ASSESSMENT ACTUAL
EXAM GUIDE 2024|BRAND NEW EXAM
QUESTIONS AND CORRECT ANSWERS ALL
GRADED A+|GUARANTEED SUCCESS|LATEST
UPDATE 2024-2025
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.
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.
Data Independence - ANSWER-✔Allows database designers to tune query
performance without changes to application programs.
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