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Free PDF Quiz 2025 1z0-076: Oracle Database 19c: Data Guard Administration Useful Certification

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Oracle 1z0-076 Exam Syllabus Topics:

Topic
Details

Topic 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.

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

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 4

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.

Topic 5

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 6

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 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.

Topic 9

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.

Topic 10

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.

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Oracle Database 19c: Data Guard Administration Sample Questions (Q62-Q67):

NEW QUESTION # 62
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 may have a performance impact on the physical standby database if the CACHE size is too small.
D. Their usage will always have a performance impact on the primary database.
E. They must have the NOORDEK and CACHE options set.

Answer: C,D,E

Explanation:
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.

NEW QUESTION # 63
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 protection mode will automatically change to Maximum Performance.
C. Real-time query will be disabled on the physical standby.
D. The physical standby database instance is shut down by the Data Guard broker.

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.
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.

NEW QUESTION # 64
Your Data Guard environment consists of these components and settings:
A primary database supporting an OLTP workload
A remote physical standby database
Real-time query is enabled
The redo transport mode is set to SYNC
The protection mode is set to Maximum Availability
Which two statements are true regarding the DelayMins database property for the standby database?

A. It allows logical corruptions on the primary to be recovered by using the physical standby database.
B. It enables you to bypass the default network timeout interval specified for the standby redo transport destination.
C. It can only be enabled for a configuration in Maximum Availability mode.
D. It specifies a delay before the primary ships redo to the standby destination having DelayMins set.
E. It can only be enabled for a configuration in Maximum Performance mode.
F. It allows user errors on the primary to be recovered by using the physical standby database.

Answer: A,F

NEW QUESTION # 65
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 protection mode will automatically change to Maximum Performance.
C. Real-time query will be disabled on the physical standby.
D. The physical standby database instance is shut down by the Data Guard broker.

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 # 66
Which TWO statements are true about configuring Oracle Net Service in a Data Guard environment?

A. Installing the oracle-database-preinstall-19c package is NOT sufficient to set up operating system kernel parameters for Oracle Net.
B. A static service must be registered with the local listener to enable DGMGRL to restart instances during the course of broker operations.
C. Install the oracle-database-preinstall-19c package to set the kernel parameters for Oracle Net based on the Data Guard best practice guidelines.
D. Enterprise Manager does not require static service registration to restart instances during the course of broker operations.
E. It is necessary to use the failover clause for an address_list with multiple address lists in the tnsnames.ora file.

Answer: A,B

Explanation:
A static service must be registered with the local listener to enable DGMGRL to restart instances during the course of broker operations (A): For DGMGRL (Data Guard Manager Command-Line Interface) to perform instance management operations, such as restarting instances, a static service registration in the listener is required. This allows the broker to connect to the database instance even when the instance is not fully up and the dynamic service registration is not available.
Installing the oracle-database-preinstall-19c package is NOT sufficient to set up operating system kernel parameters for Oracle Net (C): While the oracle-database-preinstall-19c package automates the setting of several kernel parameters to meet the preinstallation requirements for Oracle Database, it does not specifically tailor all settings for Oracle Net in a Data Guard configuration. Additional manual configuration may be required to optimize Oracle Net services for Data Guard operations.
Reference:
Oracle Data Guard Broker documentation
Oracle Net Services Administrator's Guide

NEW QUESTION # 67
......

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