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WGU D426 | WGU D426 OBJECTIVE ASSESSMENT FINAL EXAM 150 QUESTIONS AND CORRECT DETAILED ANSWERS NEWEST VERSION | ALREADY A GRADED | NEW AND REVISED$21.49
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WGU D426 | WGU D426 OBJECTIVE
ASSESSMENT FINAL EXAM 150 QUESTIONS
AND CORRECT DETAILED ANSWERS NEWEST
2024-2025 VERSION | ALREADY A GRADED | NEW
AND REVISED
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. - ANSWER- Analysis Phase, Conceptual Design,
Entity-Relationship Modeling (Database Design)
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. -
ANSWER- Logical Design (Database Design)
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. - ANSWER-
Physical Design
Allows database designers to tune query performance without changes to
application programs. - ANSWER- Data Independence
,To simplify the use of SQL with a general-purpose language, database
programs typically use an ____________ _____________
_______________. - ANSWER- Application Programming Interface
(API)
A text interface included in the MySQL Server download. - ANSWER-
MySQL Command-Line Client
'World' database, a database that is usually installed with ______. -
ANSWER- MySQL
MySQL Server returns an _____ ____ and description when an SQL
statement is syntactically incorrect or the database cannot execute the
statement. - ANSWER- Error Code
Data structures that prescribe how data is organized.
Operations that manipulate data structures.
Rules that govern valid data. - ANSWER- Database Model
An ORDERED collection of elements enclosed in parentheses. -
ANSWER- Tuple
A _____ has a name, a fixed tuple of columns, and a varying set of rows.
- ANSWER- Table
A ______ has a name and a data type. - ANSWER- Column
, Is an unnamed tuple of values. Each value corresponds to a column and
belongs to the column's data type. - ANSWER- Row
A ____ _____ is a named set of values, from which column values are
drawn. - ANSWER- Data Type
Selects all rows of two tables. - ANSWER- Union
Computes functions over multiple table rows, such as sum and count. -
ANSWER- Aggregate
Rules that are logical constraints and ensure data is valid. - ANSWER-
Relational Rules
SQL is the standard language for relational databases, and is commonly
supported in non-relational databases. - ANSWER- The standard
language for Relational Databases...
Explicit values that are string, numeric, or binary.Strings must be
surrounded by single quotes or double quotes.Binary values are
represented with x'0' where the 0 is any hex value. - ANSWER- Literals
(SQL Syntax)
Words with special meaning.
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