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Oracle - 1z0-076 - Updated Exam Oracle Database 19c: Data Guard Administration Collection Pdf

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Oracle 1z0-076 Exam Syllabus Topics:

Topic
Details

Topic 1

Using Oracle Active Data Guard: Supported Workloads in Read-Only Standby Databases: Here, the usage of physical standby databases for real-time queries is discussed.

Topic 2

Managing Oracle Net Services in a Data Guard Environment: The section focuses on Oracle Net Services and its role in Data Guard networking setup.

Topic 3

Oracle Data Guard Broker Basics: An overview of the Data Guard broker, its architecture, components, benefits, and configurations, is provided here. It serves as an introduction to the tool used for managing Data Guard configurations.

Topic 4

Using Flashback Database in a Data Guard Configuration: This topic covers the configuration and advantages of using Flashback Database in a Data Guard setup, as well as the process of enabling fast-start failover for seamless role changes.

Topic 5

Performing Role Transitions: Here, the concept of database roles is explained, along with the steps for performing switchovers, failovers, and maintaining physical standby sessions during role transitions.

Topic 7

Creating a Logical Standby Database: This topic guides users through the process of creating and managing a logical standby database, including SQL Apply filtering.

Topic 8

Oracle Data Guard Basics: This topic covers the essential architecture and concepts of Oracle Data Guard. It includes sub-topics such as the physical and logical standby database comparison, benefits of Data Guard, and its integration with multi-tenant databases.

Topic 9

Patching and Upgrading Databases in a Data Guard Configuration: This section provides guidance on patching and upgrading databases in a Data Guard environment, along with performance optimization techniques and monitoring considerations.

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

NEW QUESTION # 27
Examine the Data Guard configuration:

What happens if you issue "switchover to sheep;" at the DGMGRL prompt?

A. The switchover succeeds and Dogs becomes the new failover target.
B. The switchover succeeds and Cats becomes the new failover target.
C. It results in an error indicating that a switchover is not allowed.
D. The switchover succeeds and Fast-Start Failover is suspended.
E. The switchover succeeds but Dogs needs to be reinstated.

Answer: A

Explanation:
When issuing a "switchover to sheep;" command in a Data Guard configuration, the primary database (Dogs) transitions to a standby role, and the target standby database (Sheep) becomes the new primary database. Fast-Start Failover (FSFO) remains enabled, but its target changes according to the new roles of the databases. Since Cats is also a physical standby database, it does not become the failover target by default unless it is specified in the broker configuration. After the switchover, the original primary (Dogs) becomes the new standby database and thus the new failover target for FSFO.
Reference:
Oracle Data Guard Broker documentation provides detailed procedures and explanations of switchover operations, including how FSFO targets are affected post-switchover. This behavior is consistent across different Oracle Database versions that support Data Guard and FSFO.

NEW QUESTION # 28
Which three are prerequisites for enabling Fast-Start Failover?

A. Flashback Database must be enabled only on the Fast-Start Failover target standby database.
B. The Data Guard environment must be managed by the Data Guard Broker.
C. You can specify only one standby database as the fast-start failover target.
D. The maximum protection mode can be used, but with two or more standby databases.
E. The configuration must be operating in either Maximum Performance or Maximum Protection mode.
F. Flashback Database must be enabled on both the primary database and the Fast-Start Failover target standby database.

Answer: B,C,F

Explanation:
To enable Fast-Start Failover in a Data Guard environment, the following conditions must be in place:
The Data Guard environment must be managed by the Data Guard Broker (A): The Broker simplifies management tasks and is required to enable fast-start failover, which is an automatic failover mechanism provided by Data Guard.
You can specify only one standby database as the fast-start failover target (C): Fast-start failover is designed to fail over to a single, predetermined standby database, known as the target standby.
Flashback Database must be enabled on both the primary database and the Fast-Start Failover target standby database (F): Flashback Database provides a quick way to revert a database to a point in time before a logical or physical corruption or error occurred. It must be enabled on both the primary and target standby databases to allow for the possibility of reinstating the old primary as a standby after a failover.
Reference:
Oracle Data Guard Concepts and Administration Guide
Oracle Database High Availability Overview

NEW QUESTION # 29
Your Data Guard configuration consists of these components and settings:
1. A primary database
2. A remote physical standby database
3. Real-time query is enabled
4. Redo transport mode is synchronous
5. Protection mode is maximum availability
6. The Data Guard broker is used
You notice that the standby destination fails to acknowledge reception of redo within net_timeout period of time.
Which is true in this scenario?

A. Synchronous redo transport mode connections to the standby database are terminated.
B. The physical standby database instance is shut down by the Data Guard broker.
C. The protection mode will automatically change to Maximum Performance.
D. Real-time query will be disabled on the physical standby.

Answer: A

Explanation:
In a Data Guard configuration where the protection mode is set to Maximum Availability and synchronous redo transport is enabled, if the standby destination fails to acknowledge the reception of redo within the net_timeout period, the primary database will terminate the synchronous redo transport mode connections to the standby database to protect the primary database from hanging (C). The primary database then operates in a Maximum Performance mode until the issue is resolved. This behavior ensures that the primary database can continue to process transactions even when the standby database is temporarily unavailable.
Reference:
The Oracle Data Guard Broker documentation and Oracle Data Guard Concepts and Administration guide detail the behavior of different protection modes and the response to network timeouts, including the fallback to asynchronous redo transport to maintain primary database availability.

NEW QUESTION # 30
Which three Data Guard monitoring activities may be performed using Enterprise Manager Cloud Control?

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

Answer: A,B,D

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.
References: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 # 31
Which FOUR database parameters might be affected by or influence the creation of standby databases?

A. COMPATIBLE
B. ARCHIVE_LAG_TARGET
C. DB_NAME
D. FALSERVER
E. db_file_name_convert
F. STANDBY_ARCHIVE_DEST

Answer: A,C,E,F

Explanation:
* DB_NAME (A): The name of the database, which should remain consistent across the primary and standby databases.
* db_file_name_convert (C): This parameter helps define the mapping of data file names from the primary to the standby database, which is crucial during the creation and operation of a standby database.
* COMPATIBLE (D): The compatibility level can influence the features that can be used on the standby database and must be consistent with or higher than that of the primary database, especially after upgrades.
* STANDBY_ARCHIVE_DEST (F): This parameter specifies the destination of archived redo log files on the standby database, which is important for log transport and apply services.
References:
* Oracle Data Guard Concepts and Administration Guide
* Oracle Database Reference

NEW QUESTION # 32
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