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Oracle 1z1-076 Exam Syllabus Topics:| Topic | Details | | Topic 2 | - 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 3 | - 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 4 | - 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.
| | Topic 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.
| | Topic 6 | - 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 8 | - 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 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 | - 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.
| | Topic 11 | - 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 12 | - 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.
| | Topic 13 | - Managing Oracle Net Services in a Data Guard Environment: The section focuses on Oracle Net Services and its role in Data Guard networking setup.
|
Oracle Database 19c: Data Guard Administration Sample Questions (Q65-Q70):NEW QUESTION # 65
You notice that the SQL apply lag on your logical standby database has increased but the redo transport lag has not.
Which four could be reasons for the increase in SQL apply lag?
- A. An undersized undo tablespace on the logical standby
- B. An undersized shared pool
- C. An increased number of bulk updates on the primary
- D. Many SQL apply operations do full table scans
- E. An increased number of bulk inserts on the primary
- F. The standby redo log files are undersized on the primary database
Answer: A,B,C,D
Explanation:
The SQL apply lag on a logical standby database can be caused by several factors:
A: An undersized undo tablespace can lead to delays in SQL apply operations as it may not be able to handle the volume of undo records generated by the SQL apply process.
B: SQL apply operations that do full table scans can consume significant system resources, potentially leading to higher apply lag.
C: An increased number of bulk updates on the primary database may generate a large volume of redo data, which can cause apply lag if the logical standby cannot apply the changes quickly enough.
F: An undersized shared pool may affect the parsing and execution of SQL statements by SQL apply, which can contribute to the apply lag.
Option D is less likely to be a direct cause of SQL apply lag compared to bulk updates, as inserts generate new data rather than modifying existing data, which SQL apply can typically handle more efficiently.
Option E is incorrect because the size of the standby redo log files on the primary database impacts redo transport lag, not SQL apply lag.
NEW QUESTION # 66
You created a physical standby database prodsbyi from the primary database prod using SQL and RMAN.
Which THREE are prerequisites for creating a Data Guard Broker configuration to manage these databases?
- A. The primary database must have supplemental logging enabled.
- B. The DG_BROKER_START parameter must be set to TRUE for both database instances.
- C. The standby database must have supplemental logging enabled.
- D. The primary database must have FORCE LOGGING enabled.
- E. A local net service name to enable connectivity to the PRODSBYI database instance must be defined on the primary database host.
- F. The LOG_ARCHIVE_DEST_n parameters with the service attribute set must be cleared.
Answer: A,B,E
Explanation:
When setting up a Data Guard Broker configuration for a primary database and its physical standby, the following prerequisites must be met:
* A: Oracle Net connectivity must be defined on both the primary and standby hosts to enable the respective database instances to communicate with each other.
* B: Supplemental logging is required on the primary database because it provides additional logging necessary for the standby database to be able to apply changes from the primary database accurately.
* F: The DG_BROKER_START parameter must be set to TRUE for both the primary and standby
* database instances. This parameter is used to start the Data Guard Broker process which manages the configuration.
Options C and D are not prerequisites for creating a Data Guard Broker configuration. Additionally, while FORCE LOGGING mode (option E) is recommended as a best practice to prevent possible data inconsistencies during media recovery, it is not a strict prerequisite for creating a Data Guard Broker configuration.
References: This guidance is based on Oracle's best practices for setting up Data Guard configurations, as found in the Oracle Data Guard Broker documentation and the Oracle Data Guard Concepts and Administration guide.
NEW QUESTION # 67
Examine this list of possible steps:
1. Raise the compatibility level on both databases.
2. Restart SQL Apply on the upgraded logical standby database.
3. Start SQL Apply on the old primary database.
4. Perform a Switchover to the logical standby database.
5. Upgrade the logical standby database.
6. Upgrade the old primary database.
Which is the minimum number of steps in the correct order, to perform a rolling release upgrade of a data guard environment using an existing logical standby database and to enable the new functionality?
- A. 4,6,5,2,3,1
- B. 1,5,2,4,6,3
- C. 5,2,4,6,3,1
- D. 5,2,4,3,6,1
- E. 5,2,4,1
Answer: B
Explanation:
The process of performing a rolling release upgrade in a Data Guard environment using a logical standby database generally involves these steps:
Raise the compatibility level on both databases (1): Ensuring both the primary and logical standby databases are operating with the same and correct compatibility level is essential before starting the upgrade process.
Upgrade the logical standby database (5): Apply the database upgrade to the logical standby first, which allows the primary database to continue serving the workload without interruption.
Restart SQL Apply on the upgraded logical standby database (2): Once the logical standby has been upgraded, SQL Apply must be restarted to apply the redo data from the primary database, which is still running the earlier version.
Perform a switchover to the logical standby database (4): After confirming that the logical standby database is successfully applying redo data, perform a switchover to make it the new primary database.
Upgrade the old primary database (6): With the new primary database now in place, upgrade the old primary database (which is now the new standby) to the new Oracle Database release.
Start SQL Apply on the old primary database (3): Finally, start SQL Apply on what is now the standby database to synchronize it with the new primary database.
Reference:
Oracle Data Guard Concepts and Administration Guide
Oracle Database Upgrade Guide
NEW QUESTION # 68
Which THREE statements are TRUE about the supported workload in Active Data Guard standby databases?
- A. Read-mostly reporting applications that use global temporary tables for storing temporary data can be offloaded.
- B. The DDL operations on private temporary tables are transparently redirected to the primary database.
- C. The DML operations on a standby can be transparently redirected to and run on the primary database
- D. PL/SQL blocks that you run on Active Data Guard standby databases can be always redirected to and run on the primary database.
- E. You might have to use sequences with global temporary tables to support read-mostly applications by using Active Data Guard.
Answer: A,C,E
Explanation:
In an Oracle Active Data Guard environment:
B: Read-mostly reporting applications that utilize global temporary tables to store session-specific data can be effectively offloaded to an Active Data Guard standby database, reducing the load on the primary database.
C: Sequences can be used with global temporary tables on an Active Data Guard standby database to support certain types of read-mostly applications, though some restrictions on sequence use may apply.
E: In Oracle Database 19c and later, DML redirection allows DML operations performed on an Active Data Guard standby database to be transparently redirected to the primary database. This is part of the DML Redirection feature.
Option A is incorrect because not all PL/SQL blocks run on an Active Data Guard standby database can be redirected to the primary database. Some PL/SQL executions, specifically those that would attempt to make changes to the database, are not supported on the standby.
Option D is incorrect because DDL operations on private temporary tables are not redirected; instead, private temporary tables are session-specific and are not persisted on disk, so they do not generate redo and are not applicable to an Active Data Guard standby.
NEW QUESTION # 69
You must configure on Oracle Data .......
1. A primary database
2. Three Physical Standby Databases
Examine these requirements:
A designated physical standby database should become the primary database automatically whenever the primary database fails.
2. The chosen protection mode should provide the highest level of protection possible without violating the other requirement.
Which redo transport mode and protection mode would you configure to meet these requirements?
- A. FASTSYNC and Maximum Protection
- B. ASYNC and Maximum Performance
- C. SYNC and Maximum Protection
- D. FASTSYNC and Maximum Availability
Answer: D
Explanation:
To meet the requirements of automatic failover and the highest level of protection without data loss, the combination of FASTSYNC redo transport mode and Maximum Availability protection mode is appropriate. FASTSYNC ensures that the performance impact on the primary database is minimized while still providing synchronous transport. Maximum Availability protection mode offers the highest level of data protection without compromising the availability of the primary database. In case of a network failure or a standby failure, the primary will not halt, avoiding disruption to the primary database operations.
Reference
Oracle Data Guard Concepts and Administration guide, which details the different protection modes and their respective levels of data protection and impact on database operations.
NEW QUESTION # 70
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