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Oracle 1z0-076基礎訓練 & 1z0-076日本語試験情報

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Oracle 1z0-076基礎訓練 & 1z0-076日本語試験情報

Posted at yesterday 22:18      View：12 | Replies：0        Print      Only Author   [Copy Link] 1#
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Oracle 1z0-076 認定試験の出題範囲：
トピック出題範囲
トピック 1
  • 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 2
  • 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 3
  • ロジカル スタンバイ データベースの作成: このトピックでは、SQL Apply フィルタリングを含むロジカル スタンバイ データベースの作成および管理のプロセスについて説明します。
トピック 4
  • Data Guard 環境での Oracle Net Services の管理: このセクションでは、Oracle Net Services と、Data Guard ネットワーク設定におけるその役割に焦点を当てます。
トピック 5
  • ロール遷移の実行: ここでは、データベース ロールの概念と、ロール遷移中にスイッチオーバー、フェイルオーバー、およびフィジカル スタンバイ セッションを維持するための手順について説明します。
トピック 6
  • 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 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。

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Oracle Database 19c: Data Guard Administration 認定 1z0-076 試験問題 (Q34-Q39):質問 # 34
Which two statements are true regarding Data Guard environments in an Oracle Muti-tenant architecture?
  • A. Standby redo log files are required for each pluggable database that is protected with Data Guard.
  • B. Different redo transport methods can be configured for different pluggable databases within one Data Guard environment.
  • C. The Data Guard broker may be used for multi-tenant databases.
  • D. PDB_FILE_NAME CONVERT must be set to enable creation of standby databases if they are created on the same host as the primary.
  • E. A Data Guard environment with a multi-tenant primary database can operate in any Protection mode.
正解：C、E
解説：
Oracle Multi-tenant architecture and Data Guard have several interactions, but specific aspects hold true in such environments:
* The Data Guard broker may be used for multi-tenant databases (B): Data Guard Broker simplifies the management and monitoring of Data Guard configurations and is fully compatible with the Oracle Multi-tenant architecture, allowing for easy management of Data Guard configurations that include multi-tenant container databases (CDBs) and their pluggable databases (PDBs).
* A Data Guard environment with a multi-tenant primary database can operate in any Protection mode (E): Data Guard can be configured to operate in Maximum Performance, Maximum Availability, or Maximum Protection mode, regardless of whether the primary database is a multi-tenant database.
This flexibility ensures that Data Guard can meet various data protection and availability requirements in multi-tenant environments.References:
* Oracle Data Guard Broker documentation
* Oracle Multitenant Administrator's Guide

質問 # 35
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. Lower DB_BLOCK_CHECKING to MEDIUM or low on the standby databases.
  • B. Increase the size of the buffer cache on the physical standby database instances.
  • C. Increase the number of standby redo log files on the standby databases.
  • D. Decrease the redo log file size on the primary database.
  • E. Increase the size of standby redo log files on the standby databases.
正解：A、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 # 36
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 DG_BROKER_START parameter must be set to TRUE for both database instances.
  • B. The LOG_ARCHIVE_DEST_n parameters with the service attribute set must be cleared.
  • 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 primary database must have supplemental logging enabled.
正解：A、E、F
解説：
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.

質問 # 37
On your logical standby database, you specified these rules:

After completion of the weekend batch cycle you attempt to delete the SQL Apply filters:

Which is TRUE regarding the execution of the UNSKIP procedure?
  • A. It deletes both the SQL Apply filters.
  • B. It returns an error because the syntax to delete a SQL Apply filter must specify the same object names as specified when the filter was added.
  • C. It succeeds only if SQL apply is stopped before deleting the SQL Apply filter.
  • D. It succeeds but the SQL Apply filters are not deleted.
  • E. It succeeds only if all DML statements executed on the primary have been applied on the logical standby deleting the SQL Apply filter.
正解：A
解説：
The execution of the UNSKIP procedure is designed to remove SQL Apply filters that have been previously set up on a logical standby database. Based on the provided statements, the UNSKIP procedure is directed to delete any SQL Apply filters for DML statements associated with objects in the 'HR' schema that start with 'EMP'. Since both SKIP procedures had the same schema name ('HR') and statement type ('DML'), and the UNSKIP procedure uses a wildcard (%) for the object name, it will successfully remove both of the SQL Apply filters for 'EMP_NEW' and 'EMP_OLD', as both object names match the pattern provided in the UNSKIP procedure.
Reference:
Oracle's Data Guard documentation and SQL Language Reference provide insights into managing SQL Apply filters on a logical standby database using the DBMS_LOGSTDBY package. This includes adding and removing filters through SKIP and UNSKIP procedures.

質問 # 38
Suppose that you manage the following databases in your environment:
* boston: Primary database with a single PDB called DEVI
* london: Physical standby database protecting the PDB called DEVI
* orcl: Stand-alone database with a single PDB called PDB1 as a remote clone source You are planning to run the following command to create a remote clone in the primary database (boston) using pdbi in orcl:
Which are the THREE prerequisites for automating instantiation of the PDB in the standby database (london)?
  • A. Open PDBI (remote clone source) in Read Only.
  • B. Enable Active Data Guard in the _ondon database.
  • C. Set standby_pdb_source_file_dblink to clone_link in the london database.
  • D. Open PDBI (remote clone source) in Read Write.
  • E. Set STANDBY_FILE_MANAGEMENT to auto in the london database.
  • F. Set STANDBY_PDB_SOURCE_FILE_DIRECTORY to <location of the PDB> in the london database.
正解：A、E、F
解説：
To automate the instantiation of a PDB in the standby database after creating a remote clone in the primary database, certain conditions must be met:
Open PDBI (remote clone source) in Read Only (A): The source PDB from which the clone is created must be open in read-only mode to ensure a consistent state during cloning.
Set STANDBY_PDB_SOURCE_FILE_DIRECTORY to <location of the PDB> in the london database (C): This parameter specifies the location on the standby database where the files from the source PDB should be placed.
Set STANDBY_FILE_MANAGEMENT to auto in the london database (F): This parameter automates the management of file changes on the standby database when structural changes occur on the primary database, ensuring that the clone operation is reflected automatically on the standby.
Reference:
Oracle Multitenant Administrator's Guide
Oracle Data Guard Broker documentation

質問 # 39
......
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