Exam (elaborations) WGU D426 V2

6/18/25, 9:29 AM WGU D426 V2




WGU D426 V2 NEWEST EXAM 2025 -2026 \ACTUAL EXAM WITH
COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS
\\VERIFIED ANSWERS \LATEST UPDATE ALREADY GRADED A+




Components of a computer Architecture 3 multiple choice options
system and the
relationships between
components.
Interact directly with Tools 3 multiple choice options
database users and
administrators and send
queries to the
query processor. Includes
Connectors & APIs,
Workbench, and utility
programs.
Interprets queries. Query Processor 3 multiple choice options
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.
Link between tools and query Connection 3 multiple choice options
processor
Creates connections and Connection Manager 3 multiple choice options
manages
communication between
tools and query parser.
Translates the query Storage Engine 3 multiple choice options
processor instructions into
low-level file system
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commands that modify or
retrieve data.

Accesses data on storage File System 2 multiple choice options
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.
Stores reusable information Cache Manager 3 multiple choice options
in main memory.
Retains data blocks from the Buffer Manager 3 multiple choice options
file system for possible
reuse.
Arranged in hierarchy Multi-tier architecture 3 multiple choice options
Multi-tier consisting of web Web architecture 3 multiple choice options
browsers and web servers
communicating over the
internet.
A software layer that Virtual Machine 3 multiple choice options
emulates a complete,
independent computing
environment.
A database offered as a Cloud Database 3 multiple choice options
PaaS cloud service.
A statement or proposition Premise 3 multiple choice options
from which another
statement is inferred.




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Multiple processors Parallel Computer 3 multiple choice options
managed by a single
operating system
instance.
Shared memory - share the
same memory and storage
media.
Shared storage - share
storage media only. Shared
nothing
Group of computers Node 3 multiple choice options
connected by LAN or WAN
Group of nodes connected Cluster 3 multiple choice options
by a LAN, managed by
separate operating system
instances. Similar to a parallel
computer.
Runs on a parallel computer Parallel Database 3 multiple choice options
or cluster
Runs on multiple computers Distributed Database 3 multiple choice options
connected by a WAN
Updates data on Distributed Transactions 3 multiple choice options
multiple nodes of a
distributed database. Two-
phase commit (nodes
receive notice of update,
store
update in log, send
confirmation, then
receive commit). Either
all nodes or no nodes
must be successfully
updated.
Updates data on a single node Local Transaction 3 multiple choice options
of a
distributed database.
Databases that use this

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