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Topic: Real Oracle 1z0-076 Exam Practice Questions

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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

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 4

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 5

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 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 7

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

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 9

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.

Oracle Database 19c: Data Guard Administration Sample Questions (Q51-Q56):

NEW QUESTION # 51
Which two are true about database roles in an Oracle Data Guard configuration?

A. A Snapshot Standby Database can be a fast-start failover target.
B. A configuration consisting only of a primary and one or more physical standby databases can support a rolling release upgrade.
C. A Logical Standby Database can be converted to a Snapshot Standby Database.
D. A Physical Standby Database can be converted into a Logical Standby Database.
E. A Logical Standby Database can cascade redo to a terminal destination.

Answer: B,D

Explanation:
A Physical Standby Database can indeed be converted into a Logical Standby Database, providing flexibility in a Data Guard configuration. This allows for the database to switch roles and supports SQL apply operations, enabling more granular control over the data and transactions being replicated and applied. Additionally, having a configuration with a primary database and one or more physical standby databases allows for rolling upgrades to be performed. This means that each database in the Data Guard configuration can be upgraded in a phased manner, minimizing downtime and ensuring high availability during the upgrade process.

NEW QUESTION # 52
Examine the Data Guard configuration:
DGMGRL> show configuration;
Configuration - Animals
Protection Mode: Max Availability
Databases:
dogs - Primary database sheep
- Physical standby database cats
- Physical standby database
Fast-Start Failover: DISABLED
Configuration Status: SUCCESS
An attempt to enable fast-start failover raises an error:
DGMGRL> enable fast_start failover;
Error: ORA-16693: requirements not met for enabling fast-start failover Failed.
Identify three possible reasons for this error.

A. The LogXptMode property is set to async on Dogs.
B. The LogXptMode property is set to FASTSYNC on Cats while Sheep is the target standby database.
C. The LogxptModr property is set to async on Sheep while Sheep is the target standby database.
D. The fastStartFailoverTarget property is not set on Dogs.
E. The LogXptMode property is set to fastsync on Dogs.

Answer: A,C,D

Explanation:
When enabling fast-start failover, certain conditions must be met:
The fastStartFailoverTarget property is not set on Dogs (A): The primary database (Dogs) needs to have a fast-start failover target configured for the operation to succeed.
The LogXptMode property is set to ASYNC on Sheep while Sheep is the target standby database (B): Fast-start failover requires synchronous redo transport (SYNC or FASTSYNC) to ensure zero data loss, which is a prerequisite for enabling the feature.
The LogXptMode property is set to ASYNC on Dogs (D): Similar to the previous point, the primary database must be configured to use synchronous redo transport for the fast-start failover to be possible.
Reference:
Oracle Data Guard Broker documentation
Oracle Database Error Messages Guide

NEW QUESTION # 53
Your Data Guard environment has two remote physical standby databases.
Client applications use the local naming method to connect to the primary database instance.
You want applications to automatically connect to the new primary database instance in case of a switchover or a failover.
Which set of actions will fulfill this requirement?

A. Set DB_NAME and DB_UNIQUE_NAME identically on all databases; modify the connection descriptors on client applications to include all the standby hosts and connect to the database instance using that service name.
B. Set the LOCAL_LISTENER parameter for all the database instance to register services with the default listener on the primary database host.
C. Create a database service on the primary database that is started automatically by a trigger, when the database role is PRIMARY; modify the connection descriptors used by client applications to include all the standby hosts and connect to the database instance using that service name.
D. Set the INSTANCE NAME parameter identically on all databases; modify the connection descriptor on client applications to include all the standby hosts and connect to the database instance using that service name.

Answer: C

Explanation:
For seamless client redirection in a Data Guard environment, the following steps should be taken:
Create a database service on the primary database that is started automatically by a trigger when the database role is PRIMARY (B): This ensures that the service is only available on the primary database and is automatically started after a role transition due to switchover or failover.
Modify the connection descriptors used by client applications to include all the standby hosts and connect to the database instance using that service name (B): Client applications use the connection descriptors that include all potential primary hosts (i.e., the current primary and all standbys). This enables clients to connect to whichever database is currently acting as the primary using the service name.
Reference:
Oracle Data Guard Concepts and Administration Guide
Oracle Real Application Clusters Administration and Deployment Guide

NEW QUESTION # 54
Which two are true about managing and monitoring Oracle container databases in a Data Guard environment using the broker?

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

Answer: B,D

Explanation:
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

NEW QUESTION # 55
Examine the Data Guard configuration:

What happens if you issue "switchover to sheep;" at the DGMGRL prompt?

A. The switchover succeeds and Fast-Start Failover is suspended.
B. The switchover succeeds and Cats becomes the new failover target.
C. It results in an error indicating that a switchover is not allowed.
D. The switchover succeeds and Dogs becomes the new failover target.
E. The switchover succeeds but Dogs needs to be reinstated.

Answer: D

Explanation:
When issuing a "switchover to sheep;" command in a Data Guard configuration, the primary database (Dogs) transitions to a standby role, and the target standby database (Sheep) becomes the new primary database.
Fast-Start Failover (FSFO) remains enabled, but its target changes according to the new roles of the databases.
Since Cats is also a physical standby database, it does not become the failover target by default unless it is specified in the broker configuration. After the switchover, the original primary (Dogs) becomes the new standby database and thus the new failover target for FSFO.References:Oracle Data Guard Broker documentation provides detailed procedures and explanations of switchover operations, including how FSFO targets are affected post-switchover. This behavior is consistent across different Oracle Database versions that support Data Guard and FSFO.

NEW QUESTION # 56
......

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