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2024 WGU D426 V2 EXAM QUESTIONS AND CORRECT DETAILED ANSWERS AGRADE

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WGU D426 V2 EXAM QUESTIONS AND CORRECT DETAILED ANSWERS AGRADE

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  • 16 de diciembre de 2023
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  • 2023/2024
  • Examen
  • Preguntas y respuestas
  • WGU D426
  • WGU D426
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WGU D426 V2 200+ EXAM QUESTIONS AND CORRECT DETAILED
ANSWERS AGRADE




1. The relationship (within the relation) that describes how the value of one
attribute may be used to find the value of another attribute.: Functional Depen-
dency

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

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

4. Define & manage database structures: DDL

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

6. Used to create user accounts, manage permissions and access.: DCL

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

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



,9. Not stored in memory. Only computed when used or accessed.: Virtual View

10. The data about the data. Describes elements such as columns, names, and
data type.: Metadata

11. Ordered collection of elements in parentheses.: Tuple

12. % of table rows selected by a query: Hit Ration

13. Reads blocks directly, without accessing an index.: Table Scan

14. Reads index blocks sequentially in order to locate the needed table
blocks.: Index Scan

15. Database repeatedly splits the index in two until it finds a match.: Binary
Search

16. Database object that maps one or more tables to a single file.: Tablespace

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

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

19. Components of a computer system and the relationships between compo-
nents.: Architecture

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



, 21. 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

22. Link between tools and query processor: Connection

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