WGU D330 OBJECTIVE ASSESSMENT 2 LATEST 2026 ACTUAL EXAM | D330 DATA SYSTEMS ADMINISTRATION OA EXAM WITH REAL EXAM QUESTIONS AND CORRECT VERIFIED ANSWERS ALREADY GRADED A+ (MOST RECENT!!)

WGU D330 OBJECTIVE ASSESSMENT 2 LATEST 2026 ACTUAL
EXAM | D330 DATA SYSTEMS ADMINISTRATION OA EXAM WITH
REAL EXAM QUESTIONS AND CORRECT VERIFIED ANSWERS
ALREADY GRADED A+ (MOST RECENT!!)


This comprehensive exam preparation delivers real practice questions
with verified answers and in-depth rationales for the WGU D330 exam. It
covers all core competencies including Oracle database administration,
DBUA upgrades, Data Pump utilities, and SQL*Loader configurations. Ideal
for students looking to master complex data systems engineering
concepts and secure an A+ grade on their objective assessment.


1. Which background process is responsible for writing dirty buffers
from the database buffer cache to the data files under standard
conditions?
A. LGWR
B. CKPT
C. DBWn
D. SMON
VERIFIED ANSWER: C
EXPLANATION: The Database Writer (DBWn) process writes
modified (dirty) buffers from the database buffer cache to the

, physical data files on disk. LGWR writes redo logs, CKPT
updates file headers, and SMON performs instance recovery.
2. When an Oracle Database instance crashes, which background
process automatically performs instance recovery upon the next
startup?
A. PMON
B. SMON
C. DBWn
D. ARCn
VERIFIED ANSWER: B
EXPLANATION: The System Monitor (SMON) process handles
instance recovery at startup by applying uncommitted changes
from the online redo logs (redo phase) and rolling back
uncommitted transactions (undo phase).
3. A database administrator needs to ensure that user process
resources are cleaned up if a client connection terminates
abnormally. Which process handles this?
A. SMON
B. RECO
C. PMON
D. DBWn
VERIFIED ANSWER: C
EXPLANATION: The Process Monitor (PMON) monitors user

, processes and cleans up failed connections, releasing held
resources, locks, and memory back to the system.
4. Which component of the Oracle System Global Area (SGA) stores
parsed SQL statements, execution plans, and data dictionary
information?
A. Database Buffer Cache
B. Redo Log Buffer
C. Shared Pool
D. Large Pool
VERIFIED ANSWER: C
EXPLANATION: The Shared Pool contains the Library Cache (for
SQL statements and execution plans) and the Data Dictionary
Cache.
5. In Oracle architecture, what is the primary purpose of the Redo Log
Buffer?
A. To cache data blocks for faster reading
B. To store recovery information before writing it to disk
C. To hold execution plans for queries
D. To manage user session memory allocations
VERIFIED ANSWER: B
EXPLANATION: The Redo Log Buffer is a circular buffer in the
SGA that holds information about changes made to the
database. This metadata is written to the online redo logs on
disk by LGWR for recovery purposes.

, 6. Which initialization parameter determines the maximum size of the
System Global Area (SGA) that can be allocated for an instance?
A. SGA_TARGET
B. SGA_MAX_SIZE
C. MEMORY_TARGET
D. PGA_AGGREGATE_TARGET
VERIFIED ANSWER: B
EXPLANATION: SGA_MAX_SIZE specifies the maximum memory
allocation limit for the SGA during the lifetime of the instance.
SGA_TARGET defines the current active allocation for dynamic
automatic management.
7. During instance startup, which file is looked for first by default if no
specific configuration file is specified in the startup command?
A. init.ora
B. config.ora
C. spfile.ora
D. sqlnet.ora
VERIFIED ANSWER: C
EXPLANATION: Oracle Database looks for the Server Parameter
File (spfile<ORACLE_SID>.ora) first in its default platform
directory. If not found, it checks for generic spfile.ora, and
then falls back to the text-based init.ora.
8. What is the fundamental difference between an SPFILE and a text-
based PFILE?