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Oracle 1z0-076 考試大綱：

主題	簡介
主題 2	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 3	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 4	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 5	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 6	Creating a Logical Standby Database: This topic guides users through the process of creating and managing a logical standby database, including SQL Apply filtering.
主題 7	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 8	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 9	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.
主題 11	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 12	Managing Physical Standby Files After Structural Changes on the Primary Database: The topic covers managing structural changes in the primary database and their impact on physical standby files.
主題 13	Monitoring a Data Guard Broker Configuration: The topic covers the use of Enterprise Manager and DGMGRL to monitor Data Guard configurations and explains the various data protection modes available.

最新的 Oracle Database 19c 1z0-076 免費考試真題 (Q61-Q66):

問題 #61
Which TWO statements are true for Data Guard environments with multi-tenant databases?

A. Different pluggable databases within a logical standby database may have different guard statuses.
B. The Data Guard broker automatically opens all pluggable databases of a primary database after a role change operation.
C. A multi-tenant standby database can have fewer pluggable databases than the primary container database.
D. The CDBDBA privilege must be used instead of the SYSDBA privilege for connections as SYS to the root container of a multi-tenant standby database.
E. The Data Guard broker automatically always opens the pluggable databases of a standby database after a role change operation.

答案：A,C

問題 #62
Your Data Guard environment consists of these components and settings:
1. A primary database
2. A remote physical standby database
3. Real-time query is enabled.
4. The redo transport mode is set to SYNC.
5. The protection mode is set to Maximum Availability.
You notice that queries executed on the physical standby database receive errors: ORA-03172:
STANDBY_MAX_DATA_DELAY of 15 seconds exceeded. Which two would you recommend to avoid this error?

A. Increase the size of the buffer cache on the standby database instance.
B. Increase the number of standby redo log files on the primary database.
C. Change the protection mode to Maximum Performance.
D. Change the protection mode to Maximum Protection.
E. Reduce I/O latency for the storage used by the primary database.
F. Increase the network bandwidth between the primary and standby databases.

答案：E,F

解題說明：
The ORA-03172: STANDBY_MAX_DATA_DELAY error indicates that the real-time query on the physical standby database is experiencing delays beyond the specified maximum data delay threshold. Increasing the network bandwidth (Option E) can enhance the speed at which redo data is transferred from the primary to the standby database, thereby reducing the likelihood of exceeding the STANDBY_MAX_DATA_DELAY threshold. Reducing I/O latency on the primary database's storage (Option B) ensures that redo data is generated and shipped more efficiently, further mitigating the risk of delay. These actions, focused on optimizing data transfer and processing speed, address the root causes of the ORA-03172 error in a synchronous Data Guard configuration operating in Maximum Availability mode.

問題 #63
Which four factors can influence the rate of SQL apply on a logical standby database?

A. the number of PREPAER processes
B. the size of the undo tablespace on the logical standby database
C. the number of applier processes
D. the number of coordinator processes on the standby database instance
E. the size of the shared pool
F. the number of full table scans performed by SQL apply

答案：A,C,D,F

解題說明：
The rate of SQL apply on a logical standby database can be influenced by:
A: The number of PREPARER processes (which seems to be a typographical error and should read as PREPARER or similar) which prepare the redo data for the applier processes.
B: The number of coordinator processes on the standby database instance which coordinate the SQL apply activities.
C: The number of full table scans performed by SQL apply since full table scans can be resource-intensive and slow down the apply rate.
E: The number of applier processes which apply the redo data to the logical standby database.
Option D is incorrect as the size of the undo tablespace on the logical standby database is more likely to affect the SQL apply lag rather than the rate of SQL apply.
Option F is incorrect because the size of the shared pool would typically not influence the rate of SQL apply. The shared pool is more related to the caching of shared SQL and PL/SQL code and control structures.

問題 #64
Which THREE statements are TRUE about Global Sequences when connected to a physical standby database with Real-Time Query enabled?

A. Their creation requires that a LOG archive_dest_n parameter be defined in the standby that points back to the primary.
B. If the CACHE option is set then the size of the cache must be at least 100.
C. Their usage will always have a performance impact on the primary database.
D. Their usage may have a performance impact on the physical standby database if the CACHE size is too small.
E. They must have the NOORDEK and CACHE options set.

答案：C,D,E

解題說明：
Global Sequences are Oracle sequences that generate unique values across multiple instances in an Oracle RAC or a Data Guard configuration. Regarding their behavior and performance when connected to a physical standby database with Real-Time Query enabled:
* A: The usage of Global Sequences can indeed have a performance impact on the primary database due to the need to generate unique values that are consistent across both primary and standby databases.
* D: The performance impact on the physical standby database may occur if the CACHE size is too small. This is because the standby database will frequently have to access the primary database to replenish the cache, which can increase the load and potentially lead to performance degradation.
* E: Global Sequences should have the NOORDER and CACHE options set. The NOORDER option ensures that sequence numbers are provided without guaranteeing sequence order, thus improving scalability and performance. The CACHE option is used to specify how many sequence values will be held in memory for faster access.
Option B is incorrect as the LOG_ARCHIVE_DEST_n parameter's definition for standbys pointing back to the primary does not directly pertain to the creation of sequences.
Option C is incorrect because there is no requirement that the size of the cache for a sequence must be at least
100. The CACHE size can be set to a different number based on specific use cases or performance considerations.
References: Oracle's documentation on sequences and their behavior in a Data Guard environment provides insights into the performance considerations and best practices for using sequences, particularly in a Real-Time Query context.

問題 #65
Which two are true about managing and monitoring Oracle container databases in a Data Guard environment using the broker?

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

答案：A,B

解題說明：
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

問題 #66
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Oracle 1z0-076 考試大綱：

最新的 Oracle Database 19c 1z0-076 免費考試真題 (Q61-Q66):

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