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WGU D426 V2 EXAM 2025 QUESTIONS WITH VERIFIED ANSWERS A+ GRADE

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WGU D426

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WGU D426

WGU D426 V2 EXAM 2025 QUESTIONS WITH VERIFIED ANSWERS A+ GRADE The relationship (within the relation) that describes howthe value of one attribute may be used to find the value ofanother attribute.: Functional Dependency An attribute that can be used to find the value of anotherattribute in th...

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Uploaded on October 22, 2024
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wgu d426 v2 exam 2025 questions with verified
wgu d426 v2 exam 2025 questions with verified ans

Institution WGU D426
Course WGU D426

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HOSMERIT

WGU D426 V2 EXAM 2025 QUESTIONS WITH
VERIFIED ANSWERS A+ GRADE

The relationship (within the relation) that describes howthe value of one attribute may be
used to find the value ofanother attribute.: Functional Dependency

An attribute that can be used to find the value of anotherattribute in the relation.:
Determinant

Value can be used to find the value of every other non-keyattribute in the table. Unique and
minimal.: Candidate Key

Define & manage database structures: DDL

Adding, deleting, and modifying data - Manipulates datastored in a data- base.: DML

Used to create user accounts, manage permissions andaccess.: DCL

Includes CREATE, DROP, ALTER, TRUNCATE, RENAME:
DDL

A view created and stored on the database. Underlying datais changed and also updated
in this view. Uses memory space.: Materialized View

Not stored in memory. Only computed when used oraccessed.: Virtual View

The data about the data. Describes elements such ascolumns, names, and data type.:
Metadata

,Ordered collection of elements in parentheses.: Tuple

% of table rows selected by a query: Hit Ration

Reads blocks directly, without accessing an index.: TableScan

Reads index blocks sequentially in order to locate theneeded table blocks.: Index Scan

Database repeatedly splits the index in two until it finds amatch.: Binary Search

Database object that maps one or more tables to a singlefile.: Tablespace

Specifies tables, columns, and keys. Implements databaserequirements in a specific
database system. Also called a schema.: Logical Design

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

Components of a computer system and the relationshipsbetween compo- nents.: Architecture

Interact directly with database users and administratorsand send queries to the query
processor. Includes Connectors & APIs, Workbench, and utility programs.: 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.: Query Processor

Link between tools and query processor: Connection

, Creates connections and manages communicationbetween tools and query parser.:
Connection Manager

Translates the query processor instructions into low-levelfile system commands that modify
or retrieve data.: Storage Engine

Accesses data on storage media. Data stored on storagemedia and orga- nized in files.
Contains 3 types of data: - User data (tables & indexes) - Log files (record of any changes) -
Data dictionary (aka: catalog directory of tables, columns, keys, indexes in a relational
database). One row foreach database object.: File System

Stores reusable information in main memory.: CacheManager

Retains data blocks from the file system for possiblereuse.: Buffer Manager

Arranged in hierarchy: Multi-tier architecture

Multi-tier consisting of web browsers and web serverscommunicating over the internet.:
Web architecture

A software layer that emulates a complete, independentcomputing envi- ronment.: Virtual
Machine

A database offered as a PaaS cloud service.: CloudDatabase

A statement or proposition from which another statementis inferred.: -Premise

Multiple processors managed by a single operating system instance. Shared memory -
share the same memoryand storage media.

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Exam (elaborations)

WGU D426 V2 EXAM 2025 QUESTIONS WITH VERIFIED ANSWERS A+ GRADE

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