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Oracle 1z0-076 Exam Syllabus Topics:

Topic
Details

Topic 1

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 2

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 3

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 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.

Topic 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.

Topic 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.

Topic 8

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 9

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 10

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 (Q65-Q70):

NEW QUESTION # 65
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. Change the protection mode to Maximum Protection.
B. Change the protection mode to Maximum Performance.
C. Increase the size of the buffer cache on the standby database instance.
D. Increase the number of standby redo log files on the primary database.
E. Increase the network bandwidth between the primary and standby databases.
F. Reduce I/O latency for the storage used by the primary database.

Answer: E,F

Explanation:
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.

NEW QUESTION # 66
Examine the Data Guard configuration after an accidental switchover to Sheep:
DGMGRL> show configuration;
Configuration - Animals
Protection Mode: MaxAvailability
Databases:
sheep - Primary database
dogs - Logical standby database
cats - Physical standby database (disabled)
ORA-16795: the standby database needs to be re-created
Fast-Start Failover: DISABLED
Configuration Status:
SUCCESS
Which three statements will be true after a switchover to Dogs?

A. Dogs will be the primary database.
B. Cats will be an enabled physical standby database.
C. Sheep will be a disabled logical standby database.
D. Sheep will be an enabled logical standby database.
E. Cats will be a disabled physical standby database that can be manually enabled.

Answer: A,D,E

NEW QUESTION # 67
Which TWO statements are true about database parameters for databases in a Data Guard environment?

A. LOG_FILE_NAME_CONVERT applies to online redo logs and archived logs.
B. The databases that are part of a Data Guard configuration must have different DB_UNIQUE_NAME initialization parameters.
C. If DB_RECOVERY_FILE_DEST is specified, then LOG_ARCHIVE_DEST_n is not required for local archive logs.
D. COMPATIBLE must have identical values for primary and standby databases.
E. DB_FILE_NAME_CONVERT is only required if the standby database is on the same host as the primary database.

Answer: B,D

NEW QUESTION # 68
You created the PRODSBY1 physical standby database for the PROD primary database using gql and RMAN. You are planning to create a Data Guard Broker configuration. You execute the command:

Which three statements are true regarding the execution of the command?

A. The PRODSBYI standby database is automatically added to the configuration if Oracle Net connectivity to the PRODSBYl database instance is defined on the primary host.
B. The PRODSBY1 standby database is automatically added to the configuration if DG_BROKER_START is TRUE for PRODSBYl.
C. The Data Guard Broker configuration files is automatically created in the destinations specified by the DG_BROKER_CONFIG_FILEn initialization parameters on the primary database.
D. The command will execute successfully only if the DG_BROKER_START initialization parameter is set to TRUE for the PROD database instance.
E. The command will execute successfully only if Oracle Net connectivity to the PROD database instance is defined on the primary host.
F. The command will execute successfully only if Oracle Net connectivity to the PROD and PRODSBYl database instances are defined on the primary host.

Answer: C,D,E

Explanation:
The command executed (CREATE CONFIGURATION 'DGConfig' AS PRIMARY DATABASE IS 'PROD' CONNECT IDENTIFIER IS PROD;) is used to create a Data Guard Broker configuration named 'DGConfig'. The successful execution of this command depends on several conditions:
A: The DG_BROKER_START parameter must be set to TRUE on the primary database to start the Data Guard Broker processes. Without the broker processes running, the configuration cannot be created.
D: Oracle Net connectivity to the PROD database instance must be established on the primary host. This is because the Data Guard Broker requires network accessibility to communicate with the primary database and manage the configuration.
E: When the configuration is created, the Data Guard Broker configuration files are indeed automatically created in the locations specified by the DG_BROKER_CONFIG_FILEn parameters on the primary database.
It's important to note that the command will not automatically add the PRODSBY1 standby database to the configuration (thus B and C are not correct), and there is no requirement for the standby database to have Oracle Net connectivity defined on the primary host for the execution of this command (making F incorrect as well).

NEW QUESTION # 69
Which THREE statements are true........ open in real time query mode, which becomes a new.

A. User sessions can be retained.
B. Sessions that have long running queries can be retained.
C. User sessions and Current Buffers are maintained by default.
D. All current buffers can be retained.
E. All sessions are disconnected and all
F. Sessions that are using database links

Answer: A,D,E

Explanation:
When a physical standby database is opened in real-time query mode, which may be referred to as real-time apply when using Active Data Guard, certain operations can disrupt ongoing sessions. However, with features like Application Continuity and the proper configuration of initialization parameters such as STANDBY_DB_PRESERVE_STATES, user sessions and current buffers may be preserved during role transitions such as a switchover or failover. Specifically, the STANDBY_DB_PRESERVE_STATES parameter can be set to preserve none, all, or only user sessions during such transitions. This ensures that in-flight transactions are not lost and that users do not experience disruptions during the role transitions of a physical standby database.
References
* Oracle Data Guard Concepts and Administration
* Oracle Database Licensing Information User Manual
* Oracle Data Guard Broker User Manual

NEW QUESTION # 70
......

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