[2024年06月]更新の1z0-076問題集には100%厳密検証された問題と解答で合格保証もしくは全額返金 [Q39-Q60]

[2024年06月]更新の1z0-076問題集には100%厳密検証された問題と解答で合格保証もしくは全額返金

合格させるOracle 1z0-076試験には練習テスト問題集豪華お試しセット

質問 # 39
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 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.
• B. It succeeds only if all DML statements executed on the primary have been applied on the logical standby deleting the SQL Apply filter.
• C. It deletes both the SQL Apply filters.
• D. It succeeds but the SQL Apply filters are not deleted.
• E. It succeeds only if SQL apply is stopped before deleting the SQL Apply filter.

正解：C

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.
References: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 # 40
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 Write.
• B. Set standby_pdb_source_file_dblink to clone_link in the london database.
• C. Open PDBI (remote clone source) in Read Only.
• D. Set STANDBY_PDB_SOURCE_FILE_DIRECTORY to <location of the PDB> in the london database.
• E. Set STANDBY_FILE_MANAGEMENT to auto in the london database.
• F. Enable Active Data Guard in the _ondon database.

正解：C、D、E

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.
References:
* Oracle Multitenant Administrator's Guide
* Oracle Data Guard Broker documentation

質問 # 41
In Oracle Database 19c, you can set the value of database initialization parameters in a database using the EDIT DATABASE... SET PARAMETER Command:
DGMGRL> EDIT DATABASE 'boston' SET PARAMETER log_archive_trace - 1;
Which THREE statements are TRUE about the command?

• A. The edit database parameter command can only be used to modify the value of a dynamic parameter in a database.
• B. The database must be available when the above command is run.
• C. The value set using this command is directly applied to the boston database.
• D. The EDIT DATABASE PARAMETER command can be used to set the value of a static parameter in a database.
• E. The value set using this command is directly stored in the broker configuration file.

正解：A、B、C

解説：
The EDIT DATABASE...SET PARAMETER command in Data Guard Management (DGMGRL) is used to modify the value of initialization parameters for a database within a Data Guard configuration. This command can be used to modify both static and dynamic parameters, but if a static parameter is changed, the new value will take effect only after the database is restarted. The database must be up and running for the command to execute, and the values set using the command are directly applied to the specified database (in this case,
'boston') .

質問 # 42
Which two statements are true when using non-rolling release upgrades in a Data Guard environment?

• A. Modifications to the data dictionary on the primary database caused by the upgrade, are applied on a logical standby database.
• B. During the upgrade of a logical standby database, standby redo log files must reside on O/S file systems.
• C. Modifications to the data dictionary on the primary database caused by the upgrade, are applied on a physical standby database.
• D. User equivalence must be established for the owner of the Oracle software on the affected hosts prior to the upgrade.
• E. The compatible parameter on a standby database that is applying redo, must be equal to or greater than the compatible parameter on the primary that is shipping redo to that standby.

正解：C、E

解説：
* The compatible parameter on a standby database that is applying redo, must be equal to or greater than the compatible parameter on the primary that is shipping redo to that standby (A):
This ensures that the standby database can apply redo from the primary, even after the primary has been upgraded. The COMPATIBLE parameter setting on the standby database should not preclude it from understanding the redo it receives.
* Modifications to the data dictionary on the primary database caused by the upgrade, are applied on a physical standby database (C): When the primary database undergoes a non-rolling upgrade, any resulting data dictionary changes are transmitted through redo data and applied to the physical standby database.
References:
* Oracle Database Upgrade Guide
* Oracle Data Guard Concepts and Administration Guide

質問 # 43
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. 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.
• C. Set the LOCAL_LISTENER parameter for all the database instance to register services with the default listener on the primary database host.
• 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.

正解：B

解説：
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.References:
* Oracle Data Guard Concepts and Administration Guide
* Oracle Real Application Clusters Administration and Deployment Guide

質問 # 44
Examine this query and its output:

Which two statements are true?

• A. Cats is a bystander database.
• B. The master observer is connected to the database on which the query was executed.
• C. The master observer is not connected to the database on which the query was executed.
• D. The master observer is currently running on ol7.example.com.
• E. The master observer is not running, but should run on ol7.example.com.

正解：A、C

解説：
D: The database role indicated by FS_FAILOVER_STATUS as BYSTANDER implies that the database is a standby database in the Data Guard configuration. This means the database is neither a primary database nor an active failover target.
E: Since the FS_FAILOVER_OBSERVER_HOST column shows cats, it suggests that this is the host on which the observer would run. However, because the FS_FAILOVER_OBSERVER_PRESENT column is not shown, we cannot definitively state if the observer is currently connected or not. If FS_FAILOVER_OBSERVER_PRESENT is 'YES', the observer is connected, if 'NO', then it's not. In the absence of this column's output, the best assumption based on the available data is that the observer is not connected.
The output shows that the FS_FAILOVER_STATUS is BYSTANDER, which indicates that the database in question is not actively involved in a fast-start failover configuration as a primary or standby. It is in a bystander role, meaning that while it is part of a Data Guard configuration, it is neither a target for failover nor actively participating in failover operations. Additionally, FS_FAILOVER_OBSERVER_HOST shows
'cats', which indicates the host where the observer process is expected to run. However, since there is no information about the observer being present, we can infer that although 'cats' is designated for the observer to run, the observer is not currently connected to this database.
ReferencesOracle documentation on Data Guard configurations and the V$DATABASE view which provides information about the fast-start failover status and observer host.

質問 # 45
Which THREE statements are TRUE about the supported workload in Active Data Guard standby databases?

• A. You might have to use sequences with global temporary tables to support read-mostly applications by using Active Data Guard.
• B. Read-mostly reporting applications that use global temporary tables for storing temporary data can be offloaded.
• 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. PL/SQL blocks that you run on Active Data Guard standby databases can be always redirected to and run on the primary database.

正解：A、B、C

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 # 46
Which three Data Guard monitoring activities may be performed using Enterprise Manager Cloud Control?

• A. You can check the potential data loss in the event of a disaster.
• B. You can set a warning threshold on the redo generation rate metric for a physical standby database.
• C. You can set a critical threshold on the redo generation rate metric for a primary database.
• D. You can monitor the redo apply rate on a logical standby database.
• E. You can monitor the redo apply rate on a snapshot standby database.
• F. You can check if redo apply needs to be tuned.

正解：A、C、D

解説：
Enterprise Manager Cloud Control offers comprehensive monitoring capabilities for Oracle Data Guard environments. It enables monitoring the rate at which redo is being applied on a logical standby database (A), which is crucial for ensuring that the standby database is keeping up with the changes from the primary. It also allows setting thresholds on performance metrics, such as the redo generation rate on the primary database (B), to alert administrators when values exceed critical or warning thresholds. Additionally, it provides the capability to estimate the potential data loss in the event of a disaster (E), helping in disaster recovery planning and ensuring business continuity.
References:Oracle Enterprise Manager Cloud Control documentation provides extensive information on its monitoring features for Oracle Data Guard, including setting thresholds, estimating potential data loss, and tracking redo apply rates.

質問 # 47
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. DGMGRL may be used to add a single database to the Sales configuration even if Sales is a member of the Prod pool.
• B. Adding a database to the Sales configuration with DGMGRL automatically adds the database to the Prod Pool.
• C. Performing a role change with DGMGRL automatically notifies GDS which in turn activates the appropriate services.
• 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.References:
* Oracle Data Guard Broker documentation
* Oracle Global Data Services documentation

質問 # 48
Which three are prerequisites for using Data Guard Broker?

• A. The broker configuration files for a RAC database must reside in shared storage accessible by all the RAC database instances.
• B. A statically defined listener end-point must be registered with the local listener on the servers hosting the standby database instances.
• C. Network connectivity to the primary database instance must be defined on the servers hosting the standby database instances.
• D. The primary and standby databases must run the same version of the Oracle Database server.
• E. If any database in the configuration is a RAC database, then the broker configuration files must reside in shared storage accessible by all database instances for all databases in the broker configuration.
• F. DG_BROKEB_START must be set to TRUE for a database instance before adding the database to the broker configuration.

正解：C、D、E

解説：
Data Guard Broker is a management tool that simplifies the configuration, management, and monitoring of Data Guard environments. The prerequisites for using Data Guard Broker include:
* The primary and standby databases must run the same version of the Oracle Database server (A):
This ensures compatibility between the primary and standby databases and enables seamless role transitions and data synchronization.
* Network connectivity to the primary database instance must be defined on the servers hosting the standby database instances (B): Proper network connectivity is essential for communication between the primary and standby databases, allowing for the replication of data and the synchronization of changes.
* If any database in the configuration is a RAC database, then the broker configuration files must reside in shared storage accessible by all database instances for all databases in the broker configuration (D): In Real Application Clusters (RAC) environments, shared storage ensures that all instances of the RAC database can access the broker configuration files, facilitating the management of the Data Guard environment across all instances.References:
* Oracle Data Guard Broker documentation
* Oracle Real Application Clusters Administration and Deployment Guide

質問 # 49
Which TWO statements correctly describe the behavior of Automatic Block Media Recovery in a Data Guard environment, for a corrupt block in the example tablespace encountered by a session logged in as the SH user?

• A. A corrupt block on the primary database is automatically recovered, using a block from a flashback log from a standby database with Real-Time Query enabled.
• B. A corrupt block on a standby database with Real-Time Query enabled, can be automatically recovered, using a block from the primary database.
• C. A corrupt block on a standby database with Real-Time Query enabled, is automatically recovered, using flashback logs from the standby database.
• D. A corrupt block on the primary database can be automatically recovered, using a block from a standby database with Real-Time Query enabled.
• E. A corrupt block on the primary database is automatically recovered, using a block from a flashback log from the primary database.

正解：D、E

解説：
Automatic Block Media Recovery can be a significant feature for maintaining data integrity within a Data Guard configuration.
* A corrupt block on the primary database can be automatically recovered, using a block from a standby database with Real-Time Query enabled (A): When a corrupted block is encountered on the primary database, Oracle can automatically replace it with a good block from the standby database where Real-Time Query is enabled, leveraging the standby as a source of good data.
* A corrupt block on the primary database is automatically recovered, using a block from a flashback log from the primary database (E): If a good block version is available in the flashback logs of the primary database, Automatic Block Media Recovery can use it to recover the corrupted block on the primary.References:
* Oracle Database Backup and Recovery User's Guide

質問 # 50
Your Data Guard environment contains a four-instance RAC primary database whose SID is PROD and a RAC physical standby database whose std is PROD_SBY.
Examine the command executed on a node of the primary database cluster to create a service OLTPWORKLOAD that the applications will use to connect to the database when it is in the FRlMARYTclatabase role:
srvctl add service -db PROD -service oltpworkload -role PRIMARY -failovertype SESSION -failovermethod BASIC -failoverdelay 10 -failoverretry 150 The service is then started Consider this list of tasks:
1. On a node of the standby database cluster execute:
srvctl add service -db PROD_SBY -service oltpworkload -role PRIMARY -failovertype SESSION
-failovermethod BASIC -failoverdelay 10 -failoverretry 150
2. On the primary database, create the oltpworkload database service using the dbms_service.create_service procedure.
3. Configure tap for clients in the tnsnames.ora files.
4. Make sure clients use the OLTPWORKLOAD service to connect to the database instances.
5. On the standby database, create the oltpworkload database service using the dbms_service.create_servi;l procedure.
Identify the required steps to configure and use Transparent Application Failover (taf).

• A. 3,4
• B. 2,3,4
• C. 1.4
• D. 0
• E. 1,3,4
• F. 1

正解：C

解説：
To set up Transparent Application Failover (TAF) in a Data Guard environment with RAC, you would need to:
* On a node of the standby database cluster, execute the srvctl command to add the oltpworkload service for the PRIMARY role (1): This prepares the standby cluster to provide the oltpworkload service in case a failover occurs, and the standby becomes the primary database.
* Make sure clients use the OLTPWORKLOAD service to connect to the database instances (4):
This ensures that client connections are directed to the correct service, which is managed by TAF and can fail over in case of a primary database outage.References:
* Oracle Real Application Clusters Administration and Deployment Guide
* Oracle Data Guard Concepts and Administration Guide

質問 # 51
Which four factors can influence the rate of SQL apply on a logical standby database?

• A. the size of the shared pool
• B. the number of full table scans performed by SQL apply
• C. the size of the undo tablespace on the logical standby database
• D. the number of PREPAER processes
• E. the number of applier processes
• F. the number of coordinator processes on the standby database instance

正解：B、D、E、F

解説：
The rate of SQL apply on a logical standby database can be influenced by:
* A: The number of PREPARER processes (which seems to be a typographical error and should read as PREPARER or similar) which prepare the redo data for the applier processes.
* B: The number of coordinator processes on the standby database instance which coordinate the SQL apply activities.
* C: The number of full table scans performed by SQL apply since full table scans can be resource-intensive and slow down the apply rate.
* E: The number of applier processes which apply the redo data to the logical standby database.
Option D is incorrect as the size of the undo tablespace on the logical standby database is more likely to affect the SQL apply lag rather than the rate of SQL apply.
Option F is incorrect because the size of the shared pool would typically not influence the rate of SQL apply.
The shared pool is more related to the caching of shared SQL and PL/SQL code and control structures.
References: Oracle's documentation on SQL Apply in Data Guard configurations discusses the factors affecting the performance of SQL Apply operations on logical standby databases.

質問 # 52
Which two are prerequisites for configuring flashback database for Oracle 19c databases, in a Data Guard environment?

• A. The database must be in ARCHTVELOG mode.
• B. The Data Guard real-time apply feature must be enabled.
• C. The data guard broker must be used.
• D. A far sync instance must be configured to flash back a standby when the primary has been flashed back.
• E. A fast recovery area must be configured.

正解：A、E

解説：
* A fast recovery area must be configured (B): Flashback Database requires a fast recovery area to be set up because flashback logs are stored there. The fast recovery area is a unified storage location for all recovery-related files and activities.
* The database must be in ARCHIVELOG mode (C): Flashback Database operation relies on the ability to archive redo logs. Therefore, the database must be running in ARCHIVELOG mode for Flashback Database to be enabled.
References:
* Oracle Database Backup and Recovery User's Guide
* Oracle Data Guard Concepts and Administration Guide

質問 # 53
Examine the Data Guard configuration: DGMGRL> show configuration;
Configuration - Animals
Protection Mode: MaxPerformance
Databases:
dogs- Primary database
sheep - Physical standby database
cats- Snapshot standby database
Fast-Start Failover: DISABLED
Configuration Status: SUCCESS
You receive an error while attempting to raise the protection mode to Maximum Protection:
DGMGRL> edit configuration set protection mode as maxprotection;
Error: ORA-16627: operation disallowed since no standby databases would remain to support protection mode Failed.
What can you conclude based on this error?

• A. The redo transport mode is set to asyn: for the standby database Cats.
• B. Cats is a snapshot standby database.
• C. The redo transport mode is set to async for the standby database Sheep.
• D. The redo transport mode is set to async for both standby databases.

正解：B

解説：
The error indicates that switching the protection mode to Maximum Protection is not possible due to the presence of a snapshot standby database in the Data Guard configuration, which cannot participate in synchronous redo transport required by the Maximum Protection mode. Therefore, the correct answer is:
* D. Cats is a snapshot standby database.
Comprehensive Detailed Explanation:In an Oracle Data Guard environment, the Maximum Protection mode requires that all redo data be transmitted synchronously to at least one standby database, ensuring no data loss even in the event of a primary database failure. However, a snapshot standby database, by its nature, allows read-write access and is temporarily disconnected from the redo stream, which makes it unable to participate in the synchronous redo transport required by Maximum Protection mode. The presence of a snapshot standby database in the Data Guard configuration thus prevents the activation of Maximum Protection mode, as it cannot guarantee zero data loss without a standby database capable of receiving redo data synchronously.
References:Oracle Data Guard documentation clearly outlines the requirements and restrictions of different protection modes, including the necessity for standby databases to participate in synchronous redo transport to enable Maximum Protection mode. The inability of snapshot standby databases to fulfill this requirement is a key consideration when planning Data Guard configurations and protection levels.

質問 # 54
Which THREE are among the various tasks performed by the Data Guard Monitor (DMON) process?

• A. activating role-based services appropriately in the various database instances of the configuration, based on the database role
• B. communicating with dkon processes in other database instances that are part of the broker configuration
• C. maintaining information about all members of the broker configuration in binary configuration files.
• D. communicating with the DMON process of the observer to monitor a primary database in case a fast start failover is required
• E. performing role transitions when switchover requests are made

正解：A、C、E

解説：
The Data Guard Monitor (DMON) process is a key component of Oracle Data Guard. It plays a crucial role in managing and monitoring the state of both the primary and standby databases in a Data Guard configuration.
* Performing role transitions when switchover requests are made (A): DMON is responsible for coordinating the switchover process between the primary and standby databases. This involves safely transitioning the roles of the databases to ensure data protection and availability.
* Maintaining information about all members of the broker configuration in binary configuration files (B): DMON maintains detailed information about the databases in the Data Guard configuration, including their roles, states, and network addresses. This information is stored in binary configuration files, which are used by the Data Guard Broker to manage the Data Guard environment.
* Activating role-based services appropriately in the various database instances of the configuration, based on the database role (C): DMON activates services that are appropriate for the role of each database in the Data Guard configuration. For example, it may activate different services on a primary database than on a standby database, based on the specific requirements of each role.
References:
* Oracle Data Guard Concepts and Administration
* Oracle Data Guard Broker documentation

質問 # 55
Which THREE statements are true........ open in real time query mode, which becomes a new.

• A. All sessions are disconnected and all
• B. All current buffers can be retained.
• C. Sessions that are using database links
• D. Sessions that have long running queries can be retained.
• E. User sessions can be retained.
• F. User sessions and Current Buffers are maintained by default.

正解：A、B、E

解説：
When a physical standby database is opened in real-time query mode, which may be referred to as real-time apply when using Active Data Guard, certain operations can disrupt ongoing sessions. However, with features like Application Continuity and the proper configuration of initialization parameters such as STANDBY_DB_PRESERVE_STATES, user sessions and current buffers may be preserved during role transitions such as a switchover or failover. Specifically, the STANDBY_DB_PRESERVE_STATES parameter can be set to preserve none, all, or only user sessions during such transitions. This ensures that in-flight transactions are not lost and that users do not experience disruptions during the role transitions of a physical standby database.
References
* Oracle Data Guard Concepts and Administration
* Oracle Database Licensing Information User Manual
* Oracle Data Guard Broker User Manual

質問 # 56
There are currently 6 applief. and 6 pfepafef processes running and no idle applier processes on y logical standby database.
The max_SERVERS SQL apply parameter and number of archiver processes are both set to 12.
Identify two changes, each of which would allow you to increase the number of applier processes.

• A. Increase the value for the MAX_SERVERS SQL apply parameter.
• B. Increase the processes initialization parameter. D Decrease the number of FREPARER processes.
• C. Decrease the number of archiver processes on the standby database.
• D. Increase the parallel_max_server initialization parameter.
• E. Increase the RECOVERY_PARALLEL initialization parameter.

正解：A、D

解説：
To increase the number of applier processes on a logical standby database, the following changes can be made:
* C: Increasing the value for the MAX_SERVERS SQL apply parameter would allow for more applier processes to be initiated, assuming that system resources permit.
* D: Increasing the PARALLEL_MAX_SERVERS initialization parameter would allow for more parallel execution processes, which can be used by SQL apply to increase the number of applier processes.
Option A is incorrect as decreasing the number of archiver processes will not necessarily increase the number of applier processes; these are unrelated components.
Option B is incorrect because the 'FREPARER' processes do not exist, it seems to be a typographical error, and the 'REPARER' is not a valid Oracle process or parameter.
Option E is incorrect because the RECOVERY_PARALLELISM parameter controls the number of processes used for instance recovery and media recovery, not for SQL apply.
References: Oracle Data Guard Concepts and Administration guide details the configuration and tuning of SQL apply-related parameters in logical standby databases.

質問 # 57
You created two remote physical standby databases using SQL and RMAN.
The primary database is a four-instance RAC database and each physical standby database has two instances.
Roles-based services are used for client connectivity and have been defined in the Grid Infrastructure.
Consider these operational requirements:
* The ability to manage multiple standby databases with a single tool
* The simplification of switchovers, failovers, reinstatements, and conversions to and from snapshot standby databases
* The automation of failovers to a specified target standby database
Which TWO tools can be used to fulfill these requirements7

• A. SQL*Plus
• B. DGMGRL
• C. Enterprise Manager Cloud Control
• D. GDCCTL
• E. CRSCTL
• F. SRVCTL
• G. RMAN

正解：B、C

解説：
Enterprise Manager Cloud Control provides a graphical interface to manage multiple standby databases, simplify switchovers and failovers, and automate failover processes to a specified target standby database. It offers a comprehensive view and control over the Data Guard configuration, making complex operations more manageable.
DGMGRL is a command-line tool specifically designed for managing Data Guard configurations. It allows the administration of multiple standby databases, simplifies the execution of switchovers and failovers, reinstatements, and conversions to and from snapshot standby databases, and supports the automation of failover processes to a specified standby database.
Other options like RMAN, SQL*Plus, CRSCTL, SRVCTL, and GDCCTL do not provide the same level of integrated management functionality for Data Guard environments as Enterprise Manager Cloud Control and DGMGRL.

質問 # 58
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 logical standby may be a non-container database.
• B. If the primary database is a container database, then a physical standby may be a non-container database.
• C. All broker actions execute at the root container for container databases.
• D. After a role change, the broker opens all Pluggable databases (pdbb) on the new primary.
• E. If the primary database is not a container database, then a standby may be a container database.

正解：C、D

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 # 59
Which TWO observations are true about the Far Sync instance?

• A. Receives redo synchronously from the primary database
• B. Applies redo received
• C. Can only be created using a series of SQL commands
• D. Includes a standby control file, password file, data files, standby redo logs, and archive logs
• E. Can be created using the RMAN DUPLICATE command

正解：A、B

解説：
A Far Sync instance is a special kind of Oracle Data Guard configuration that allows synchronous redo transport from a primary database to a remote standby database with minimum impact on the primary database's performance. The Far Sync instance receives redo data synchronously from the primary database (A), then ships it asynchronously to the remote standby database, thus extending zero data loss protection over longer distances and higher network latency environments than would be practical with a synchronous standby alone. The Far Sync instance does not apply the redo data; it just receives and ships it (E). A Far Sync instance does not have data files, and it cannot apply redo to stay synchronized with the primary database.
References:Oracle Database High Availability Overview and Oracle Data Guard Concepts and Administration documentation detail the role and configuration of Far Sync instances, including how they contribute to achieving zero data loss disaster recovery over long distances.

質問 # 60
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