In 2026, failing the Oracle Database 12c: Data Guard Administrator exam means paying the full registration fee a second time — plus weeks of lost momentum. The 112 practice questions in 2Pass4sure's 1Z1-066 package are designed to help you get it done on the first attempt.

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Answers to the Most Common Questions About Oracle Database 12c: Data Guard Administrator

Oracle Database 12c: Data Guard Administrator Sample Questions:

Question 1

You must propose an Oracle Data Guard configuration for a database supporting an OLTP workload that meets these permanent requirements:
1. Data loss is not permitted.
2. Read-only applications should not connect to the primary database instance.
Additionally, there are these requirements, only one of which is ever done at any one time:
3. It should be possible to apply and test designated patches with a minimum amount of downtime.
4. Upgrading to a new database release should be performed with the least possible amount of downtime.
5. New application software releases should be tested against an exact up-to-date replica of the production database.
You propose a primary database with one physical standby database configured in Maximum Protection mode.
Which requirements do you meet?

A. 1, 2, 3, 4, and 5
B. only requirement 1
C. 2, 3, 4, and 5
D. 1 and 2
E. only requirement 5

Question 2

Which three are required in order to use Real-Time Query without lagging behind the primary? (Choose three.)

A. Real-Time apply must be enabled on the standby.
B. There must be standby redo logs on the standby database.
C. The primary must ship redo asynchronously.
D. There must be standby redo logs on the primary database.
E. COMPATIBLE must be set to 11.1.0 or higher.

Question 3

A query on the view DBA_LOGSTBY_UNSUPPORTED on your primary database returns no rows.
As a result of this, you decide that an upgrade may use logical standby databases.
Which two are true about upgrading Data Guard environments consisting of one logical standby database running on a separate host from the primary? (Choose two.)

A. The upgrade always required downtime until the upgrade of the primary is completed.
B. Fast-Start Failover can be used to protect the primary database during the upgrade.
C. Using manual upgrade, catctl.pl can be executed in some cases on the primary and standby database simultaneously.
D. Using manual upgrade, catupgrd.sql needs to run on the primary database only.
E. SQL Apply on the local standby database must be stopped while the primary database is upgraded.
F. The upgrade always requires downtown until the upgrade of the logical standby is completed.

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 ways to start the observer successfully. (Choose two.)

A. Set the ObserverOverride property to TRUE before starting the observer.
B. Start the observer in a different working directory.
C. Create a broker configuration and enable Fast-Start Failover before starting the observer.
D. Start the observer using a different observer configuration file.
E. Enable Fast-Start Failover before starting the observer.

Question 5

Which three are benefits of using the Data Guard Broker to manage standby databases? (Choose three.)

A. It provides an easy failover capability using a single command.
B. It simplifies logical standby database creation.
C. It provides an easy switchover capability using a single command.
D. It simplifies physical standby database creation.
E. It load balances connections between the primary and all the standby database instances that are open as read-only for reporting.
F. It automatically changes database properties after the protection mode for a configuration is changed.
G. It coordinates database state transitions and updates database properties dynamically.

Solutions: