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Oracle Database 19c: Data Guard Administration Sample Questions (Q73-Q78):

NEW QUESTION # 73
A customer asks for your recommendation regarding this requirement:
1. We plan to have a Data Guard Configuration with one primary database and one physical standby database.
2. We want zero data loss in case of a disaster involving the loss of one component.
3. We want to do Real Application Testing occasionally on the Standby Database.
Which solution, if any, satisfies these requirements?

A. A snapshot standby database with real time query that can be converted regularly into a physical standby database open read write, to do real application testing
B. A physical standby database with synchronous redo transport that can be converted regularly into a snapshot standby to do real application testing
C. A far sync instance plus a snapshot standby database and real time apply that can be converted regularly into logical standby database to do real application testing
D. These requirements cannot be met.

Answer: B

Explanation:
* Synchronous redo transport for zero data loss (B): To guarantee zero data loss in the case of a disaster, synchronous redo transport must be configured between the primary and standby databases.
* Conversion to snapshot standby for testing (B): A physical standby database can be temporarily converted into a snapshot standby database to perform real application testing. After testing is completed, the snapshot standby can be converted back to a physical standby to resume its disaster recovery role.
References:
* Oracle Data Guard Concepts and Administration Guide
* Oracle Database Testing Guide

NEW QUESTION # 74
Which THREE steps are prerequisites for the creation of a physical standby database on a separate server using the RMAN active database duplication method?

A. Configure Oracle Net connectivity on the primary host to the standby database instance.
B. Put the primary database into archivelog mode.
C. Set the DB_UNIQUE_NAME parameter on the primary database to a different value than that of the DB_NAME name parameter.
D. Establish user equivalence for the database software owner between the primary host and standby host.
E. startup nomount the standby database instance.

Answer: A,D,E

Explanation:
Creating a physical standby database using RMAN active database duplication requires certain prerequisites to ensure a successful and seamless operation:
Configure Oracle Net connectivity on the primary host to the standby database instance (A): Proper Oracle Net connectivity between the primary and standby servers is essential for communication and data transfer during the duplication process. Oracle Net services provide the network foundation for Oracle Database, Oracle Net Listener, and Oracle applications.
Establish user equivalence for the database software owner between the primary host and standby host (B): User equivalence ensures that the user who owns the Oracle Database software on the primary server has the same privileges on the standby server. This is crucial for RMAN to perform operations on both servers without encountering permission issues.
Startup nomount the standby database instance (C): The standby database instance needs to be started in the NOMOUNT stage before the duplication can begin. This prepares the environment for creating the control file and restoring the database without mounting it, which is a necessary step in the RMAN duplication process.
Reference:
Oracle Database Backup and Recovery User's Guide
Oracle Data Guard Concepts and Administration

NEW QUESTION # 75
Your Data Guard environment consists of these components and settings:
1. A primary database
2. Two remote physical standby databases
3. The redo transport mode is set to sync
4. Real-time query is enabled for both standby databases
5. The DB_BLOCK_CHECKING parameter is set to TRUE on both standby databases You notice an increase in redo apply lag time on both standby databases.
Which two would you recommend to reduce the redo apply lag on the standby databases?

A. Lower DB_BLOCK_CHECKING to MEDIUM or low on the standby databases.
B. Increase the size of the buffer cache on the physical standby database instances.
C. Increase the size of standby redo log files on the standby databases.
D. Increase the number of standby redo log files on the standby databases.
E. Decrease the redo log file size on the primary database.

Answer: A,C

Explanation:
To reduce the redo apply lag on standby databases, one could increase the size of the standby redo log files. Larger redo log files can accommodate more redo data, which may reduce the frequency of log switches and allow for more continuous application of redo data. Additionally, lowering the DB_BLOCK_CHECKING parameter to MEDIUM or LOW on the standby databases can help improve redo apply performance. High block checking can impose additional CPU overhead during the application of redo data, potentially increasing apply lag times. By reducing the level of block checking, you can lessen this overhead and help reduce the apply lag .

NEW QUESTION # 76
Which three are true about using RMAN in a Data Guard environment?

A. Backups of archived redo logs taken on a physical standby are interchangeable with a primary.
B. A recovery catalog is required when RMAN is used to take backups from a logical standby database in a Data Guard configuration if you plan to recover the primary using those backups.
C. Backups of control files taken on a physical standby are not interchangeable with a primary.
D. A recovery catalog is required when RMAN is used to take backups from a physical standby database if you plan to recover the primary using those backups.
E. Backups of data files taken on a physical standby are interchangeable with a primary.

Answer: A,C,E

NEW QUESTION # 77
Which two are true about managing and monitoring Oracle container databases in a Data Guard environment using the broker?

A. If the primary database is a container database, then a logical standby may be a non-container database.
B. If the primary database is not a container database, then a standby may be a container database.
C. All broker actions execute at the root container for container databases.
D. After a role change, the broker opens all Pluggable databases (pdbb) on the new primary.
E. If the primary database is a container database, then a physical standby may be a non-container database.

Answer: C,D

Explanation:
In the context of Oracle Data Guard and container databases (CDBs) managed by Data Guard Broker:
* All broker actions execute at the root container for container databases (D): When using Data Guard Broker to manage a CDB, the actions performed by the broker are executed at the level of the root container. This is because the root container maintains the control and configuration information that applies to the entire CDB, including all of its pluggable databases (PDBs).
* After a role change, the broker opens all Pluggable databases (PDBs) on the new primary (E):
Following a role transition such as a switchover or a failover, Data Guard Broker ensures that all PDBs within the CDB of the new primary database are opened, which is essential to resume operations of the PDBs without manual intervention.References:
* Oracle Data Guard Broker documentation
* Oracle Multitenant Administrator's Guide

NEW QUESTION # 78
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Oracle Database 19c: Data Guard Administration Sample Questions (Q73-Q78):

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