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WGU D426 V2 Exam 160 Questions with Verified Answers,100% CORRECT $15.49   Add to cart

Exam (elaborations)

WGU D426 V2 Exam 160 Questions with Verified Answers,100% CORRECT

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  • WGU D426 V2
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  • WGU D426 V2

WGU D426 V2 Exam 160 Questions with Verified Answers

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  • October 22, 2024
  • 14
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • WGU D426 V2
  • WGU D426 V2
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WGU D426 V2 Exam 160 Questions with Verified Answers
The relationship (within the relation) that describes how the value of one
attribute may be used to find the value of another attribute. - CORRECT ANSWER
Functional Dependency

An attribute that can be used to find the value of another attribute in the relation.
- CORRECT ANSWER Determinant

Value can be used to find the value of every other non-key attribute in the table.
Unique and minimal. - CORRECT ANSWER Candidate Key

Define & manage database structures - CORRECT ANSWER DDL

Adding, deleting, and modifying data - Manipulates data stored in a database. -
CORRECT ANSWER DML

Used to create user accounts, manage permissions and access. - CORRECT
ANSWER DCL

Includes CREATE, DROP, ALTER, TRUNCATE, RENAME - CORRECT ANSWER DDL

A view created and stored on the database. Underlying data is changed and also
updated in this view. Uses memory space. - CORRECT ANSWER Materialized View

Not stored in memory. Only computed when used or accessed. - CORRECT
ANSWER Virtual View

The data about the data. Describes elements such as columns, names, and data
type. - CORRECT ANSWER Metadata

Ordered collection of elements in parentheses. - CORRECT ANSWER Tuple

% of table rows selected by a query - CORRECT ANSWER Hit Ration

, Reads blocks directly, without accessing an index. - CORRECT ANSWER Table Scan

Reads index blocks sequentially in order to locate the needed table blocks. -
CORRECT ANSWER Index Scan

Database repeatedly splits the index in two until it finds a match. - CORRECT
ANSWER Binary Search

Database object that maps one or more tables to a single file. - CORRECT ANSWER
Tablespace

Specifies tables, columns, and keys. Implements database requirements in a
specific database system. Also called a schema. - CORRECT ANSWER Logical
Design

Specifies indexes, table structures, and partitions. Specifies how tables are
organized on storage media. - CORRECT ANSWER Physical Design

Components of a computer system and the relationships between components. -
CORRECT ANSWER Architecture

Interact directly with database users and administrators and send queries to the
query processor. Includes Connectors & APIs, Workbench, and utility programs. -
CORRECT ANSWER Tools

Interprets queries. Compiles queries into low-level instructions for the storage
engine. Creates a plan to modify the database or retrieve data, and returns query
results to the application. - CORRECT ANSWER Query Processor

Link between tools and query processor - CORRECT ANSWER Connection

Creates connections and manages communication between tools and query
parser. - CORRECT ANSWER Connection Manager

Translates the query processor instructions into low-level file system commands
that modify or retrieve data. - CORRECT ANSWER Storage Engine

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