1z1-076資格問題対応、1z1-076試験問題

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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	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 2	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 3	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 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	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。

Oracle Database 19c: Data Guard Administration 認定 1z1-076 試験問題 (Q85-Q90):

質問 # 85
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. PL/SQL blocks that you run on Active Data Guard standby databases can be always redirected to and run on the primary database.
C. The DML operations on a standby can be transparently redirected to and run on the primary database
D. The DDL operations on private temporary tables are transparently redirected to the primary database.
E. You might have to use sequences with global temporary tables to support read-mostly applications by using Active Data Guard.

正解：A、C、E

解説：
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.
References: The behavior and capabilities of Active Data Guard standby databases are documented in the Oracle Data Guard Concepts and Administration guide and the Active Data Guard documentation.

質問 # 86
You must configure on Oracle Data .......
1. A primary database
2. Three Physical Standby Databases
Examine these requirements:
A designated physical standby database should become the primary database automatically whenever the primary database fails.
2. The chosen protection mode should provide the highest level of protection possible without violating the other requirement.
Which redo transport mode and protection mode would you configure to meet these requirements?

A. FASTSYNC and Maximum Availability
B. ASYNC and Maximum Performance
C. SYNC and Maximum Protection
D. FASTSYNC and Maximum Protection

正解：A

解説：
To meet the requirements of automatic failover and the highest level of protection without data loss, the combination of FASTSYNC redo transport mode and Maximum Availability protection mode is appropriate.
FASTSYNC ensures that the performance impact on the primary database is minimized while still providing synchronous transport. Maximum Availability protection mode offers the highest level of data protection without compromising the availability of the primary database. In case of a network failure or a standby failure, the primary will not halt, avoiding disruption to the primary database operations.
ReferencesOracle Data Guard Concepts and Administration guide, which details the different protection modes and their respective levels of data protection and impact on database operations.

質問 # 87
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. Increase the size of the buffer cache on the standby database instance.
B. Reduce I/O latency for the storage used by the primary database.
C. Change the protection mode to Maximum Performance.
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. Change the protection mode to Maximum Protection.

正解：B、E

解説：
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.

質問 # 88
Which TWO statements are true for Data Guard environments with multi-tenant databases?

A. A multi-tenant standby database can have fewer pluggable databases than the primary container database.
B. Different pluggable databases within a logical standby database may have different guard statuses.
C. The CDBDBA privilege must be used instead of the SYSDBA privilege for connections as SYS to the root container of a multi-tenant standby database.
D. The Data Guard broker automatically opens all pluggable databases of a primary database after a role change operation.
E. The Data Guard broker automatically always opens the pluggable databases of a standby database after a role change operation.

正解：A、B

質問 # 89
Which THREE are true about using flashback database in a Data Guard environment?

A. When a flashback database operation is performed on a primary database, a physical standby database is also flashed back automatically.
B. You can use it when real-time apply is enabled in case the physical standby suffers from logical corruption.
C. You can use it when real-time apply is enabled in case the phylt may not be used to flash back a primary database after a failover to a logical standby.
D. It may be used to flash back a physical standby that receives redo from a far sync instance.
E. When a flashback database operation is performed on a primary database, a logical standby database is also flashed back automatically.
F. It may not be used to flash back a primary database after a failover to a physical standby.

正解：B、D、F

解説：
Flashback Database is a feature that allows reverting a database to a previous point in time, which is extremely useful in various Data Guard configurations:
It may be used to flash back a physical standby that receives redo from a far sync instance (C): Flashback Database can be used on a physical standby database to revert it to a past point in time, even when it is receiving redo data from a far sync instance. This can be particularly useful to recover from logical corruptions or unwanted changes.
You can use it when real-time apply is enabled in case the physical standby suffers from logical corruption (D): Even when real-time apply is enabled, which allows redo data to be applied to the standby database as soon as it is received, Flashback Database can be used to revert the physical standby database to a point in time before the logical corruption occurred.
It may not be used to flash back a primary database after a failover to a physical standby (E): After a failover has occurred from a primary to a physical standby database, making the standby the new primary, Flashback Database cannot be used to revert the old primary database to a state before the failover because the failover operation makes irreversible changes to the database role and configuration.
Reference:
Oracle Database Backup and Recovery User's Guide
Oracle Data Guard Concepts and Administration

質問 # 90
......

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1z1-076資格問題対応、1z1-076試験問題

Oracle 1z1-076試験問題、1z1-076無料サンプル

Oracle 1z1-076 認定試験の出題範囲：

Oracle Database 19c: Data Guard Administration 認定 1z1-076 試験問題 (Q85-Q90):

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