Exam (elaborations)
WGU D426 V2 Actual Questions and Answers Latest Update 2024 Graded A
- Course
- Institution
WGU D426 V2 Actual Questions and Answers Latest Update 2024 Graded A
[Show more]
Content preview
WGU D426 V2 Actual Questions andAnswers Latest Update 2024 Graded A
1. The relationship (within the relation) that describes how the value of one
attribute may be used to find the value of another attribute.
Answer - Functional Dependency
2. An attribute that can be used to find the value of another attribute in the
relation.
Answer - Determinant
3. Value can be used to find the value of every other non-key attribute in the
table. Unique and minimal.
Answer - Candidate Key
4. Define & manage database structures
Answer - DDL
5. Adding, deleting, and modifying data - Manipulates data stored in a database.
Answer - DML
6. Used to create user accounts, manage permissions and access.
Answer - DCL
7. Includes CREATE, DROP, ALTER, TRUNCATE, RENAME
Answer - DDL
8. A view created and stored on the database. Underlying data is changed and
also updated in this view. Uses memory space.
Answer - Materialized View
9. Not stored in memory. Only computed when used or accessed.
Answer - Virtual View
10. The data about the data. Describes elements such as columns, names, and
data type.
Ask for various Exams or Study materials from
(arthurmurphy121@gmail.com)
, Answer - Metadata
11. Ordered collection of elements in parentheses.
Answer - Tuple
12. % of table rows selected by a query
Answer - Hit Ration
13. Reads blocks directly, without accessing an index.
Answer - Table Scan
14. Reads index blocks sequentially in order to locate the needed table blocks.
Answer - Index Scan
15. Database repeatedly splits the index in two until it finds a match.
Answer - Binary Search
16. Database object that maps one or more tables to a single file.
Answer - Tablespace
17. Specifies tables, columns, and keys. Implements database requirements in a
specific database system. Also called a schema.
Answer - Logical Design
18. Specifies indexes, table structures, and partitions. Specifies how tables are
organized on storage media.
Answer - Physical Design
19. Components of a computer system and the relationships between
components.
Answer - Architecture
20. Interact directly with database users and administrators and send queries to
the query processor. Includes Connectors & APIs, Workbench, and utility
programs.
Answer - Tools
Ask for various Exams or Study materials from
(arthurmurphy121@gmail.com)
, 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.
Answer - Query Processor
22. Link between tools and query processor
Answer - Connection
23. Creates connections and manages communication between tools and query
parser.
Answer - Connection Manager
24. Translates the query processor instructions into low-level file system
commands that modify or retrieve data.
Answer - Storage Engine
25. Accesses data on storage media. Data stored on storage media and
organized 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 for each
database object.
Answer - File System
26. Stores reusable information in main memory.
Answer - Cache Manager
27. Retains data blocks from the file system for possible reuse.
Answer - Buffer Manager
28. Arranged in hierarchy
Answer - Multi-tier architecture
29. Multi-tier consisting of web browsers and web servers communicating over
the internet.
Answer - Web architecture
30. A software layer that emulates a complete, independent computing
environment.
Answer - Virtual Machine
Ask for various Exams or Study materials from
(arthurmurphy121@gmail.com)
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Abdinurse. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $15.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
83822 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now