- Exam Code: 1Z0-066
- Exam Name: Oracle Database 12c: Data Guard Administrator
- Updated: Oct 09, 2026
- Q & A: 112 Questions and Answers
Oracle 1Z0-066 actual dump : Oracle Database 12c: Data Guard Administrator
PDF Version DemoAbout Oracle 1Z0-066 Exam Questions
Free demo, instant email delivery, three study formats, a year of free updates, and a refund policy with clear terms — Actual4Dumps wraps the entire Oracle Database 12c: Data Guard Administrator preparation into one purchase. Your part is simple: work through the 112 practice questions for the 1Z0-066 exam, current for 2026.
Oracle 1Z0-066 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Redo Transport and Apply | - Redo apply and recovery processes - Redo transport services |
| Topic 2: Monitoring and Troubleshooting | - Resolving synchronization and apply issues - Monitoring Data Guard configuration |
| Topic 3: Configuration and Management | - Data Guard Broker configuration and management - Creating and configuring a Data Guard environment |
| Topic 4: Oracle Data Guard Architecture | - Data Guard components and terminology - Primary and standby database concepts |
| Topic 5: Role Transitions | - Failover scenarios and best practices - Switchover operations |
Oracle 1Z0-066 Exam: Straight Answers to Real Questions
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Delivery format for the exam itself: Proctored exam via Pearson VUE testing centers or online proctoring (availability may vary by region). Pick whichever option fits your situation when scheduling.
Oracle structures the Oracle Database 12c: Data Guard Administrator exam around 5 domains. The heaviest hitters are Redo Transport and Apply, Oracle Data Guard Architecture, Role Transitions. Start your revision where the weight is, and scroll up to the outline section on this page for the complete topic list.
The 1Z0-066 exam is the official Oracle assessment that awards the Oracle Database 12c Data Guard Administrator (Oracle Certified Specialist) certification — a credential at the Professional level. Passing it proves vendor-validated skills that employers actively look for. It belongs to a broader track that includes Oracle Database 12c Administrator Certified Professional, Oracle Database 12c Certified Implementation Specialist, making it a solid anchor for further certifications.
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Oracle points Oracle Database 12c: Data Guard Administrator candidates toward these official training resources:
Coursework builds understanding; the 112 practice questions for the 1Z0-066 exam from Actual4Dumps then prove whether that understanding survives a real testing clock.
Recommended: Oracle Database 12c Administrator Certified Associate (OCA) or equivalent database administration experience Because Oracle can revise these requirements, verify the current rules on the official exam page — https://education.oracle.com — before scheduling your Oracle Database 12c: Data Guard Administrator exam.
Oracle Database 12c: Data Guard Administrator Sample Questions:
Question #1
Examine the Data Guard configuration:
DGMGRL> show configuration;
Configuration Animals
Protection Mode: MaxPerformance
Databases:
dogs Primary database
sheep Snapshot standby database
cats Snapshot standby database
Fast-Start Failover: DISABLED
Configuration Status:
SUCCESS
You receive an error while attempting to raise the protection mode to Maximum Availability:
DGMGDRL> edit configuration set protection mode as maxavailability;
Error: ORA-16627: operation disallowed since no standby databases would remain to support protection mode Failed.
Identify two statements that you can execute, either one of which will enable successful raising of the protection mode to Maximum Availability. (Choose two.)
- A. DGMGRL> edit database dogs set property LogXptMode= fastsync;
- B. DGMGRL> convert database cats to physical standby;
- C. DGMGRL> edit database sheep set property LogXptMode= fastsync;
- D. DGMGRL> edit database cats set property LogXptMode= sync;
- E. DGMGRL> convert database sheep to physical standby;
Correct Answer: C,D 🗳️
Question #2
Which three are true concerning database states after a successful switchover? (Choose three.)
- A. If the former primary database became a physical standby database it will be in the same state as the former physical standby database.
- B. The former primary database will always be open.
- C. If the former primary database became a logical standby database it will be in mount state.
- D. If the former primary database became a logical standby database it will be open read-write.
- E. If the former primary database became a physical standby database it will always be open read-only.
- F. The new primary database will be open read-write.
Correct Answer: C,E,F 🗳️
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Question #3
Which two steps must be performed before running DUPLICATE TARGET DATABASE FOR STANDBY using RMAN? (Choose two.)
- A. Create a standby controlfile.
- B. Configure Oracle Net connectivity between the primary host and the standby host.
- C. Run the nid utility to modify the DBID of the primary database.
- D. Create an SPFILE for the standby database.
- E. Transfer a copy of the passwordfile from the primary host to the standby host.
Correct Answer: A,E 🗳️
Question #4
Attempting to start the observer raises an error:
DGMGRL> start observer;
DGM-16954: Unable to open and lock the Observer configuration file Failed.
Identify two possible reasons for this error. (Choose two.)
- A. Fast-Start Failover is not yet enabled for this Data Guard configuration.
- B. The observer configuration file is marked read-only.
- C. There is already an observer running for this Data Guard configuration.
- D. The broker configuration has not yet been created.
- E. There is another observer running for a Data Guard configuration which uses the same observer configuration file.
Correct Answer: B,E 🗳️
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Question #5
Which three are prerequisites for enabling Fast-Start Failover? (Choose three.)
- A. Flashback Database must be enabled on both the primary database and the Fast-Start Failover target standby database.
- B. The Fast-Start Failover target standby database must receive REDO directly from the primary database.
- C. Flashback Database must be enabled only on the Fast-Start Failover target standby database.
- D. The configuration must be operating in either Maximum Performance or Maximum Availability mode.
- E. The configuration must be operating in either Maximum Performance or Maximum Protection mode.
- F. The Data Guard environment must be managed by the Data Guard Broker.
Correct Answer: A,D,F 🗳️
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