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[General] 便利な1z1-076出題内容一回合格-権威のある1z1-076受験方法

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【General】 便利な1z1-076出題内容一回合格-権威のある1z1-076受験方法

Posted at yesterday 13:19      View：9 | Replies：0        Print      Only Author   [Copy Link] 1#
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インターネットでOracleの1z1-076問題集を探す人がたくさんいますが、どれが信頼できるか良く分からないです。ここで我々はCertShikenの1z1-076問題集を勧めたいです。我々は自分の商品に自信を持っていますから、以上の様々な承諾をします。我々の商品を利用する人から大好評を博すのは我々の1z1-076問題集の高質量と行き届いたサービスからです。
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1z1-076試験の準備方法｜信頼できる1z1-076出題内容試験｜最高のOracle Database 19c: Data Guard Administration受験方法我々の提供するOracleの1z1-076試験の資料のどのバーションでも各自のメリットを持っています。PDF版はパソコンでもスマホでも利用でき、どこでも読めます。ネットがあれば、オンライン版はどの電子商品でも使用できます。ソフト版は真実のOracleの1z1-076試験の環境を模倣して、あなたにOracleの1z1-076試験の本当の感覚を感じさせることができ、いくつかのパソコンでも利用できます。
Oracle Database 19c: Data Guard Administration 認定 1z1-076 試験問題 (Q53-Q58):質問 # 53
You are planning to perform block comparison using the dbms comp package:

Which TWO statements are true?
  • A. Logical standby databases can be the target database for the dbms_dbcomp.dbcomp procedure.
  • B. The databases should be at least mounted before block comparison.
  • C. It requires that the DB_LOST_WKITE_protect initialization parameter be enabled.
  • D. You can monitor the progress of an ongoing block comparison operation by querying VS SES SION_LONGOPS.
  • E. It can be used to detect lost writes and inconsistencies between the primary database and the cascaded standbys.
正解：B、D
解説：
The DBMS_COMPARISON package, used for comparing and converging data objects within a single database or between databases, requires that the databases involved in the block comparison be at least mounted (A). This allows the procedure to access the data blocks for comparison. Additionally, the progress of long-running operations such as block comparison can be monitored using the dynamic performance view V$SESSION_LONGOPS (D), which provides information on the operation's progress and estimated completion time.
References:Oracle Database PL/SQL Packages and Types Reference provides comprehensive details on the DBMS_COMPARISON package, including its procedures and how to monitor their progress. Additionally, Oracle Database Reference explains the V$SESSION_LONGOPS view, which is commonly used for monitoring long operations in the database.

質問 # 54
You detected an unrecoverable archive gap in your data guard environment. So, you need to roll standby.
forward in time without applying a large number of archive log files using this command:
RMAN> RECOVER STANDBY DATABASE FROM SERVICE-<primary database name>;
When running this command, which of the following steps can be performed automatically?
1. Remember all data file names on the standby.
2. Restart standby in nomount.
3. Restore controlfile from primary.
4. Mount standby database.
5. Rename data files from stored standby names.
6. Restore new data files to new names.
7. Recover standby.
  • A. 2,3,6,7
  • B. 1,3,5,6,7
  • C. 1, 2,3,4,6,7
  • D. 2,3,5,6,7
  • E. 1,2,3,4,5,6,7
正解：C
解説：
The RECOVER STANDBY DATABASE FROM SERVICE command in RMAN is designed to automate various steps required to recover the standby database, especially when dealing with an archive gap. When this command is executed, the following actions can occur automatically:
* Remember all data file names on the standby (1): RMAN has the capability to recall the names and paths of all data files associated with the standby database.
* Restart standby in nomount (2): The standby database can be automatically restarted in the NOMOUNT state, allowing recovery operations to proceed without the database being open.
* Restore controlfile from primary (3): RMAN can restore the control file from the primary database to the standby system, ensuring that the standby has the most up-to-date control file.
* Mount standby database (4): After restoring the control file, the standby database is mounted to prepare for data file recovery.
* Rename data files from stored standby names (5): Not typically done automatically by this command.
* Restore new data files to new names (6): New data files added to the primary since the last synchronization can be restored to the standby with their correct names.
* Recover standby (7): Finally, RMAN will apply any necessary redo logs to bring the standby database up to date with the primary.
While some steps, such as renaming data files (5), typically require manual intervention or scripting, most of the recovery process can be handled by RMAN automatically, streamlining the recovery of the standby database.
References:
* Oracle Database Backup and Recovery User's Guide
* Oracle Data Guard Concepts and Administration Guide

質問 # 55
Which three are prerequisites for enabling Fast-Start Failover?
  • A. The maximum protection mode can be used, but with two or more standby databases.
  • B. The Data Guard environment must be managed by the Data Guard Broker.
  • C. Flashback Database must be enabled only on the Fast-Start Failover target standby database.
  • D. You can specify only one standby database as the fast-start failover target.
  • E. The configuration must be operating in either Maximum Performance or Maximum Protection mode.
  • F. Flashback Database must be enabled on both the primary database and the Fast-Start Failover target standby database.
正解：B、D、F
解説：
To enable Fast-Start Failover in a Data Guard environment, the following conditions must be in place:
The Data Guard environment must be managed by the Data Guard Broker (A): The Broker simplifies management tasks and is required to enable fast-start failover, which is an automatic failover mechanism provided by Data Guard.
You can specify only one standby database as the fast-start failover target (C): Fast-start failover is designed to fail over to a single, predetermined standby database, known as the target standby.
Flashback Database must be enabled on both the primary database and the Fast-Start Failover target standby database (F): Flashback Database provides a quick way to revert a database to a point in time before a logical or physical corruption or error occurred. It must be enabled on both the primary and target standby databases to allow for the possibility of reinstating the old primary as a standby after a failover.
Reference:
Oracle Data Guard Concepts and Administration Guide
Oracle Database High Availability Overview

質問 # 56
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. Change the protection mode to Maximum Protection.
  • C. Increase the network bandwidth between the primary and standby databases.
  • D. Reduce I/O latency for the storage used by the primary database.
  • E. Change the protection mode to Maximum Performance.
  • F. Increase the number of standby redo log files on the primary database.
正解：C、D
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 # 57
Which THREE statements are true about snapshot standby databases?
  • A. FLASHBACK DATABASE must be manually enabled on a physical standby database before converting it into a snapshot standby database.
  • B. A snapshot standby database may be opened read-only.
  • C. FLASHBACK DATABASE is enabled automatically on a snapshot standby database after converting it from a physical standby database if not already enabled.
  • D. A snapshot standby database can have Real-Time apply enabled.
  • E. FLASHBACK DATABASE is enabled automatically on a physical standby database as part of the conversion into a snapshot standby database, if not already enabled.
  • F. A snapshot standby database may be opened read-write.
正解：C、E、F
解説：
Snapshot standby databases are a feature of Oracle Data Guard that allows a physical standby database to be temporarily converted into a read-write database for testing or other purposes. The true statements about snapshot standby databases are:
FLASHBACK DATABASE is enabled automatically on a snapshot standby database after converting it from a physical standby database if not already enabled (B): When a physical standby is converted to a snapshot standby, FLASHBACK DATABASE is automatically enabled to allow the database to be easily reverted back to its original state.
FLASHBACK DATABASE is enabled automatically on a physical standby database as part of the conversion into a snapshot standby database, if not already enabled (C): As part of the conversion process, FLASHBACK DATABASE is turned on to ensure that changes made while the database is in snapshot standby mode can be undone.
A snapshot standby database may be opened read-write (E): Once a physical standby is converted to a snapshot standby, it can be opened for read-write operations, allowing for testing and other tasks that require a writable database.
Reference:
Oracle Data Guard Concepts and Administration
Oracle Database Backup and Recovery User's Guide

質問 # 58
......
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