WGU D426 OBJECTIVE ASSESSMENT/ WGU D426/
OBJECTIVE ASSESSMENT WGU D426 LATEST EXAM 2024-
2025 ACTUAL EXAM QUESTIONS AND CORRECT
DETAILED ANSWERS (100% CORRECT VERIFIED
ANSWERS) A NEW UPDATED VERSION 2024 |ALREADY
GRADED A+ (BRAND NEW!!)
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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