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Reliable 1z1-076 training materials bring you the best 1z1-076 guide exam: Oracle Database 19c: Data Guard Administration

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Oracle 1z1-076 Prüfungsplan:

Thema
Einzelheiten

Thema 2

Creating a Logical Standby Database: This topic guides users through the process of creating and managing a logical standby database, including SQL Apply filtering.

Thema 3

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.

Thema 4

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.

Thema 6

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.

Thema 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.

Thema 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.

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Oracle Database 19c: Data Guard Administration 1z1-076 Prüfungsfragen mit Lösungen (Q16-Q21):

16. Frage
Which THREE are always benefits of using a logical standby database?

A. It can be used for database rolling release upgrades.
B. It can be used for reporting workloads requiring additional indexes or materialized views or both.
C. It can be used as an updatable database for Real Application Testing and then converted back to a standby database without affecting the updates.
D. It provides a disaster-recovery solution with switchover and failover options that can recover any data updated on the primary database.
E. It can be used for testing patchsets without affecting the primary database.
F. It can be used to replicate a single pluggable database (PDB) in a multitenant container database.

Antwort: A,B,D

Begründung:
Logical standby databases are a key feature of Oracle Data Guard and offer several distinct advantages, especially in terms of flexibility for reporting, upgrades, and disaster recovery:
* Disaster-recovery solution with switchover and failover options (A): Logical standby databases provide a robust disaster-recovery solution, ensuring that any data updated on the primary database can be recovered. They support both switchover and failover operations, allowing for smooth role transitions between the primary and standby databases.
* Used for reporting workloads requiring additional indexes or materialized views (B): Logical standby databases can be opened for read-write operations and can have additional indexes or materialized views that are not present in the primary database. This makes them ideal for offloading reporting and querying workloads from the primary database.
* Database rolling release upgrades (D): Logical standby databases can be used to perform rolling upgrades of the Oracle Database software. This allows the database to be upgraded with minimal downtime, as the standby database is upgraded first, followed by a switchover to make it the new
* primary.References:
* Oracle Data Guard Concepts and Administration Guide
* Oracle Database High Availability Overview

17. Frage
Which TWO statements are true about Real-Time Query?

A. Disabling Real-Time Query prevents the automatic start of redo apply when a physical standby databases opened read only.
B. Real-Time Query sessions can be connected to a Far Sync instance.
C. Real-Time Query has no limitations regarding the protection level of the Data Guard environment.
D. Setting standby_max_data_delay=0 requires synchronous redo transport.
E. A standby database enabled for Real-Time Query cannot be the Fast-Start Failover target of the Data Guard configuration.

Antwort: A,D

Begründung:
Real-Time Query is a feature that allows queries to be run on a physical standby database while it is applying redo data. The relevant truths about it are:
* Setting standby_max_data_delay=0 requires synchronous redo transport (A): For the real-time apply feature to function with no data delay (zero delay), synchronous redo transport must be used. This setting ensures that the data on the standby database is as current as possible before queries are executed against it.
* Disabling Real-Time Query prevents the automatic start of redo apply when a physical standby database is opened read-only (C): If Real-Time Query is disabled, opening the standby database in read-only mode will not start the redo apply process automatically. Redo apply needs to be manually started to synchronize the standby database with the primary.References:
* Oracle Data Guard Concepts and Administration Guide

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

Antwort: C,D,E

Begründung:
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).
References: This information can be validated in Oracle's Data Guard Broker documentation, which outlines the requirements for setting up and managing a Data Guard configuration using the Data Guard Broker.

19. Frage
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. You might have to use sequences with global temporary tables to support read-mostly applications by using Active Data Guard.
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. The DML operations on a standby can be transparently redirected to and run on the primary database

Antwort: A,C,E

Begründung:
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.

20. Frage
Which THREE are always benefits of using a logical standby database?

A. It can be used for database rolling release upgrades.
B. It can be used for reporting workloads requiring additional indexes or materialized views or both.
C. It can be used as an updatable database for Real Application Testing and then converted back to a standby database without affecting the updates.
D. It provides a disaster-recovery solution with switchover and failover options that can recover any data updated on the primary database.
E. It can be used for testing patchsets without affecting the primary database.
F. It can be used to replicate a single pluggable database (PDB) in a multitenant container database.

Antwort: A,B,D

Begründung:
Logical standby databases are a key feature of Oracle Data Guard and offer several distinct advantages, especially in terms of flexibility for reporting, upgrades, and disaster recovery:
Disaster-recovery solution with switchover and failover options (A): Logical standby databases provide a robust disaster-recovery solution, ensuring that any data updated on the primary database can be recovered. They support both switchover and failover operations, allowing for smooth role transitions between the primary and standby databases.
Used for reporting workloads requiring additional indexes or materialized views (B): Logical standby databases can be opened for read-write operations and can have additional indexes or materialized views that are not present in the primary database. This makes them ideal for offloading reporting and querying workloads from the primary database.
Database rolling release upgrades (D): Logical standby databases can be used to perform rolling upgrades of the Oracle Database software. This allows the database to be upgraded with minimal downtime, as the standby database is upgraded first, followed by a switchover to make it the new primary.
Reference:
Oracle Data Guard Concepts and Administration Guide
Oracle Database High Availability Overview

21. Frage
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