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1z1-076受験対策、1z1-076受験料過去問

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Oracle 1z1-076 認定試験の出題範囲：

トピック
出題範囲

トピック 1

Oracle Data Guard 構成におけるバックアップとリカバリの考慮事項: このトピックでは、RMAN バックアップ、フィジカルスタンバイへのオフロード、ネットワークベースのリカバリなど、Data Guard 構成におけるバックアップとリカバリの手順について説明します。

トピック 2

Data Guard 構成での Flashback Database の使用: このトピックでは、Data Guard セットアップで Flashback Database を使用する構成と利点、およびシームレスなロール変更のためにファストスタートフェイルオーバーを有効にするプロセスについて説明します。

トピック 4

Data Guard Broker 構成の監視: このトピックでは、Enterprise Manager と DGMGRL を使用して Data Guard 構成を監視する方法について説明し、使用可能なさまざまなデータ保護モードについて説明します。

トピック 5

Data Guard Broker 構成の作成: このセクションでは、コマンドラインや Enterprise Manager のアプローチなど、Data Guard Broker 構成の作成と管理の実用的な側面について詳しく説明します。

トピック 6

Data Guard 環境でのクライアント接続の強化: このトピックでは、Data Guard セットアップでのクライアント接続の強化と、シームレスなクライアントリダイレクトのためのフェイルオーバー手順の実装に焦点を当てています。また、ロールの移行中に中断のない操作を保証するためのアプリケーションの継続性についても説明します。

トピック 7

Oracle Data Guard Broker の基礎: ここでは、Data Guard Broker の概要、そのアーキテクチャ、コンポーネント、利点、および構成について説明します。これは、Data Guard 構成の管理に使用されるツールの概要として役立ちます。

トピック 8

Oracle Active Data Guard の使用: 読み取り専用スタンバイデータベースでサポートされるワークロード: ここでは、リアルタイムクエリでのフィジカルスタンバイデータベースの使用について説明します。

>> 1z1-076受験対策 <<

1z1-076受験料過去問、1z1-076学習資料

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Oracle Database 19c: Data Guard Administration 認定 1z1-076 試験問題 (Q42-Q47):

質問 # 42
Examine the Data Guard configuration:

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

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

正解：A

解説：
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.

質問 # 43
You are using Data Guard in conjunction with Global Database Services.
You have a Data Guard Broker configuration called Sales and a GDS pool called Prod.
Which three are true concerning the management of the broker configuration when using GDS?

A. Performing a role change with DGMGRL automatically notifies GDS which in turn activates the appropriate services.
B. Adding a database to the Sales configuration with DGMGRL automatically adds the database to the Prod Pool.
C. DGMGRL may be used to add a single database to the Sales configuration even if Sales is a member of the Prod pool.
D. DGMGRL may be used to add the Sales configuration to the Prod pool in gds.
E. Adding a database to the Sales configuration with DGMGRL requires that the Sales configuration be disabled first. It must then be enabled after the new database is added to the configuration.

正解：A、C、D

解説：
In the context of Oracle Data Guard and Global Database Services (GDS):
DGMGRL may be used to add the Sales configuration to the Prod pool in gds (A): Data Guard Broker's command-line interface DGMGRL can be utilized to manage configurations with GDS, allowing the addition of Data Guard Broker configurations to GDS pools.
Performing a role change with DGMGRL automatically notifies GDS which in turn activates the appropriate services (B): When a role change is executed using DGMGRL, GDS is automatically notified, and it then activates the services that are appropriate for the new database roles.
DGMGRL may be used to add a single database to the Sales configuration even if Sales is a member of the Prod pool (C): DGMGRL provides the capability to manage individual databases within a broker configuration, including adding databases to a configuration that is already part of a GDS pool.
Reference:
Oracle Data Guard Broker documentation
Oracle Global Data Services documentation

質問 # 44
Which two are true about managing and monitoring Oracle container databases in a Data Guard environment using the broker?

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

正解：A、C

解説：
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

質問 # 45
Your Data Guard environment consists of these components and settings:
1. A primary database
2. Two remote physical standby databases
3. The redo transport mode is set to sync
4. Real-time query is enabled for both standby databases
5. The DB_BLOCK_CHECKING parameter is set to TRUE on both standby databases You notice an increase in redo apply lag time on both standby databases.
Which two would you recommend to reduce the redo apply lag on the standby databases?

A. Increase the number of standby redo log files on the standby databases.
B. Decrease the redo log file size on the primary database.
C. Increase the size of the buffer cache on the physical standby database instances.
D. Increase the size of standby redo log files on the standby databases.
E. Lower DB_BLOCK_CHECKING to MEDIUM or low on the standby databases.

正解：D、E

解説：
To reduce the redo apply lag on standby databases, one could increase the size of the standby redo log files.
Larger redo log files can accommodate more redo data, which may reduce the frequency of log switches and allow for more continuous application of redo data. Additionally, lowering the DB_BLOCK_CHECKING parameter to MEDIUM or LOW on the standby databases can help improve redo apply performance. High block checking can impose additional CPU overhead during the application of redo data, potentially increasing apply lag times. By reducing the level of block checking, you can lessen this overhead and help reduce the apply lag .

質問 # 46
Your Data Guard environment has two remote physical standby databases.
Client applications use the local naming method to define connectivity to the primary database instance.
Which will automatically redirect clients to the new primary database in case of a switchover or failover?

A. Set the DB_NAME parameter identically on all databases; modify the connection descriptor on the clients to use DB_NAME to connect to the primary database instance.
B. Set the LOCAL_LISTENER parameter for all the database instances, to register services with the default listener on the primary database host.
C. Create a database service on the standby databases; automate the start of the service after a role change, and modify the connection descriptor on the clients to use that service.
D. Configure a PRIMARY role service on the Primary and Standby and modify the Client connect descriptor to include both the Primary and the Standby.

正解：C

質問 # 47
......

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