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Oracle 1z0-076 考試大綱：

主題
簡介

主題 1

• 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.

主題 2

• 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.

主題 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.

主題 4

• 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.

主題 5

• 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.

主題 6

• Enhanced Client Connectivity in a Data Guard Environment: This topic focuses on enhancing client connectivity in a Data Guard setup and implementing failover procedures for seamless client redirection. It also covers application continuity to ensure uninterrupted operations during role transitions.

主題 7

• Creating a Data Guard Broker Configuration: This section delves into the practical aspects of creating and managing a Data Guard broker configuration, including command-line and Enterprise Manager approaches.

主題 8

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

主題 11

• Backup and Recovery Considerations in an Oracle Data Guard Configuration: In this topic, Backup and recovery procedures in a Data Guard configuration are discussed, including RMAN backups, offloading to physical standby, and network-based recovery.

 

最新的 Oracle Database 19c 1z0-076 免費考試真題 (Q12-Q17):

問題 #12
Which three statements are true....... With no Oracle Streams or Goldengate configured?

• A. Only standby databases can write redo....
• B. The LGWR process writes to them on ....
• C. They are required on a logical standby for real-time apply
• D. They are required on a physical standby for real-time apply.
• E. They are required only for synchronous redo transport
• F. It is recommended to have them on the...

答案：B,C,D

解題說明：
C . The LGWR (Log Writer) process is responsible for writing redo entries from the redo log buffer to the online redo log files on the primary database. This is a fundamental process in the Oracle Database architecture, ensuring that all changes made to the database are captured for purposes such as recovery, replication, and high availability.
D . Real-time apply on a logical standby database requires standby redo log files. The standby redo log files are used to store redo data received from the primary database before it is applied to the logical standby database. This enables the logical standby to apply changes as they are received, without waiting for the current redo log file to be archived.
E . Similarly, on a physical standby database, standby redo log files are used for real-time apply. They store redo data from the primary database, allowing the physical standby to apply redo data concurrently as it is received, rather than waiting for redo log files to be archived. This capability is crucial for maintaining a physical standby database that is closely synchronized with the primary database with minimal lag.
These functionalities are integral to Oracle Data Guard configurations and are not dependent on Oracle Streams or Oracle GoldenGate, which are separate technologies for data replication and integration.

 

問題 #13
Which three Data Guard monitoring activities may be performed using Enterprise Manager Cloud Control?

• A. You can monitor the redo apply rate on a snapshot standby database.
• B. You can check if redo apply needs to be tuned.
• 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 set a critical threshold on the redo generation rate metric for a primary database.

答案：C,E,F

解題說明：
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.

 

問題 #14
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. The protection mode will automatically change to Maximum Performance.
• B. Synchronous redo transport mode connections to the standby database are terminated.
• C. The physical standby database instance is shut down by the Data Guard broker.
• D. Real-time query will be disabled on the physical standby.

答案：B

解題說明：
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.
References: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.

 

問題 #15
A customer asks you to propose the most appropriate solution for this set of requirements:
We need a disaster recovery solution that enables us to fail over from our production database with zero data loss.
We want to generate reports from the proposed standby database at the same time that it is used for data protection.
Developers may need to test occasionally on a copy of the live database Which TWO solutions would you recommend?

• A. A physical standby database with real-time apply enabled
• B. A snapshot standby database with synchronous redo transport
• C. A logical standby database with real-time query enabled
• D. A logical standby database with real-time apply enabled
• E. A physical standby database with real-time query enabled

答案：C,E

 

問題 #16
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. These requirements cannot be met.
• B. 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
• C. 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
• D. A physical standby database with synchronous redo transport that can be converted regularly into a snapshot standby to do real application testing

答案：D

解題說明：
* 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

 

問題 #17
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