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WGU D426 V2 EXAM WITH COMPLETE SOLUTIONS 100% VERIFIED!!
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WGU D426 V2 EXAM WITH COMPLETE SOLUTIONS 100% VERIFIED!!...
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WGU D426 V2 EXAM WITH COMPLETE SOLUTIONS100% VERIFIED!!
The relationship (within the relation) that describes how the value of one attribute may
be used to find the value of another attribute.
Functional Dependency
3 choices
An attribute that can be used to find the value of another attribute in the relation.
Determinant
3 choices
Value can be used to find the value of every other non-key attribute in the table. Unique
and minimal.
Candidate Key
3 choices
Define & manage database structures
DDL
2 multiple choice options
Adding, deleting and modifying data - Manipulates data stored in a database.
DML
2 multiple choice options
,Used to create user accounts, manage permissions and access.
DCL
2 multiple choice options
Includes CREATE, DROP, ALTER, TRUNCATE, RENAME
DDL
2 multiple choice options
A view created and stored on the database. Underlying data is changed and also
updated in this view. Uses memory space.
Materialized View
2 multiple choice options
Not stored in memory. Computed when used/accesssed.
Virtual View
2 multiple choice options
The data about the data. Describes such things as columns, names, and data type.
Metadata
3 multiple choice options
Ordered collection of elements enclosed in parentheses.
,Tuple
3 multiple choice options
% of table rows retrieved by a query
Hit Ration
3 multiple choice options
Reads blocks directly, without traversing an index.
Table Scan
3 multiple choice options
Reads the index blocks sequentially to find the required table blocks. Index Scan 2
choice questions
Database continuously divides the index in half until it finds the matching one. Binary
Search 3 choice questions
Database structure that maps one or more tables to one file. Tablespace 3 choice
questions
Specifies tables, columns, and keys. Implements the requirements of a database in one
specific database system. Also called a schema. Logical Design 3 choice questions
, Defines the indexes, table structure, and partition. Define how tables are stored on the
media storage.
Physical Design
3 choices
###
Components of the computer system & relationships between components
Architecture
3 choices
###
Interact directly with the database users & administrators, send queries to query
processor. Connectors & APIs, Workbench, utility programs.
Tools
3 choices
Executes queries. Converts queries into low level instructions for the storage engine.
Plans how to change the database or return data, and sends query results back to the
application.
Query Processor
3 options
Connects tools and query processor
Connection
3 options
Establishes connections and manages communication between tools and query parser.
Connection Manager
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