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Oracle Database 19c: Data Guard Administration Sample Questions (Q27-Q32):

NEW QUESTION # 27
Which three Data Guard monitoring activities may be performed using Enterprise Manager Cloud Control?

A. You can check if redo apply needs to be tuned.
B. You can set a critical threshold on the redo generation rate metric for a primary database.
C. You can check the potential data loss in the event of a disaster.
D. You can set a warning threshold on the redo generation rate metric for a physical standby database.
E. You can monitor the redo apply rate on a logical standby database.
F. You can monitor the redo apply rate on a snapshot standby database.

Answer: B,C,E

Explanation:
Enterprise Manager Cloud Control offers comprehensive monitoring capabilities for Oracle Data Guard environments. It enables monitoring the rate at which redo is being applied on a logical standby database (A), which is crucial for ensuring that the standby database is keeping up with the changes from the primary. It also allows setting thresholds on performance metrics, such as the redo generation rate on the primary database (B), to alert administrators when values exceed critical or warning thresholds. Additionally, it provides the capability to estimate the potential data loss in the event of a disaster (E), helping in disaster recovery planning and ensuring business continuity.
Reference:
Oracle Enterprise Manager Cloud Control documentation provides extensive information on its monitoring features for Oracle Data Guard, including setting thresholds, estimating potential data loss, and tracking redo apply rates.

NEW QUESTION # 28
Your Data Guard environment contains a primary database and three standby databases with these attributes:
1. prod : Primary database
2. prod_prq : Physical standby database with real-time query enabled used by reporting applications
3. prod_lsby: Logical standby database used by DSS
4. PROD_SSBY: Snapshot standby database used for Real Application Testing Which TWO can be used to prevent clients from connecting to the wrong database instance?

A. Create role based services with the si vet] utility when using clusterware for Oracle RAC databases or Oracle Restart for single instance Oracle databases.
B. Create a static service for each of the databases, register it with the local listener of each database instance, and add connection descriptors on clients to connect to those services.
C. Establish Oracle Net connectivity to the primary database instance from all the standby database instances.
D. Create database services for each database and use event triggers to make sure that services are activated only when the database is in the correct role.
E. Create database services on each of the standby databases, start the services, and add connection descriptors on the clients to connect to those services.

Answer: D,E

Explanation:
Creating dedicated database services for each database instance (Option D) and utilizing event triggers to manage these services based on the role of the database (Option E) ensure that clients connect to the appropriate database instance based on its current role and state. This approach leverages the flexibility and control provided by Oracle Net services and database event management to direct client connections to the suitable primary or standby instance, enhancing the overall robustness and reliability of the Data Guard environment. References: Based on Oracle Database 19c best practices for managing connectivity and services in a Data Guard setup, including the use of role-based services and event-driven service management.

NEW QUESTION # 29
You must propose an Oracle Data Guard configuration for a database supporting an OLTP workload that meets these permanent requirements:
Data loss is not permitted.
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:
It should be possible to apply and test designated patches with a minimum amount of downtime.
Upgrading to a new database release should be performed with the least possible amount of downtime.
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. Only requirement 5
D. 1 and 2
E. 2, 3, 4, and 5

Answer: B

NEW QUESTION # 30
Which three are true about using Flashback database through role transitions in a Data Guard environment?

A. Flashback database may not be used to undo a physical standby database activation.
B. Physical standby databases retain their current role when you flash back to a point in time before the switchover occurred which caused this database to become a physical standby.
C. Logical standby databases retain their current role when you flash back through to a point in time before the switchover occurred which caused this database to become a logical standby.
D. Logical standby database roles are reverted to their original role when you flash back to a point in time before the switchover occurred which caused this database to become a logical standby.
E. Physical standby databases retain their current role when you flash back to a point in time before a reinstate occurred which caused this database to become a physical standby.

Answer: A,B,E

NEW QUESTION # 31
Examine this query and its output:

Which two statements are true?

A. Cats is a bystander database.
B. The master observer is connected to the database on which the query was executed.
C. The master observer is not connected to the database on which the query was executed.
D. The master observer is currently running on ol7.example.com.
E. The master observer is not running, but should run on ol7.example.com.

Answer: A,C

Explanation:
D . The database role indicated by FS_FAILOVER_STATUS as BYSTANDER implies that the database is a standby database in the Data Guard configuration. This means the database is neither a primary database nor an active failover target.
E . Since the FS_FAILOVER_OBSERVER_HOST column shows cats, it suggests that this is the host on which the observer would run. However, because the FS_FAILOVER_OBSERVER_PRESENT column is not shown, we cannot definitively state if the observer is currently connected or not. If FS_FAILOVER_OBSERVER_PRESENT is 'YES', the observer is connected, if 'NO', then it's not. In the absence of this column's output, the best assumption based on the available data is that the observer is not connected.
The output shows that the FS_FAILOVER_STATUS is BYSTANDER, which indicates that the database in question is not actively involved in a fast-start failover configuration as a primary or standby. It is in a bystander role, meaning that while it is part of a Data Guard configuration, it is neither a target for failover nor actively participating in failover operations. Additionally, FS_FAILOVER_OBSERVER_HOST shows 'cats', which indicates the host where the observer process is expected to run. However, since there is no information about the observer being present, we can infer that although 'cats' is designated for the observer to run, the observer is not currently connected to this database.
Reference
Oracle documentation on Data Guard configurations and the V$DATABASE view which provides information about the fast-start failover status and observer host.

NEW QUESTION # 32
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