Best Preparations of 1z1-076 Exam 2026 Oracle Database 19c Unlimited 111 Questions
Focus on 1z1-076 All-in-One Exam Guide For Quick Preparation.
NEW QUESTION # 11
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. Cats is a snapshot standby database.
- B. The redo transport mode is set to async for the standby database Sheep.
- C. The redo transport mode is set to async for both standby databases.
- D. The redo transport mode is set to asyn: for the standby database Cats.
Answer: A
Explanation:
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.
NEW QUESTION # 12
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 requires that the Sales configuration be disabled first. It must then be enabled after the new database is added to the configuration.
- C. Adding a database to the Sales configuration with DGMGRL automatically adds the database to the Prod Pool.
- D. DGMGRL may be used to add the Sales configuration to the Prod pool in gds.
- E. Performing a role change with DGMGRL automatically notifies GDS which in turn activates the appropriate services.
Answer: A,D,E
Explanation:
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
NEW QUESTION # 13
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. 1, 2,3,4,6,7
- B. 1,2,3,4,5,6,7
- C. 1,3,5,6,7
- D. 2,3,6,7
- E. 2,3,5,6,7
Answer: A
Explanation:
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
NEW QUESTION # 14
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. ASYNC and Maximum Performance
- B. FASTSYNC and Maximum Protection
- C. SYNC and Maximum Protection
- D. FASTSYNC and Maximum Availability
Answer: D
Explanation:
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.
Reference
Oracle Data Guard Concepts and Administration guide, which details the different protection modes and their respective levels of data protection and impact on database operations.
NEW QUESTION # 15
Which three are true about using RMAN in a Data Guard environment?
- A. A recovery catalog is required when RMAN is used to take backups from a logical standby database in a Data Guard configuration if you plan to recover the primary using those backups.
- B. Backups of archived redo logs taken on a physical standby are interchangeable with a primary.
- C. Backups of data files taken on a physical standby are interchangeable with a primary.
- D. Backups of control files taken on a physical standby are not interchangeable with a primary.
- E. A recovery catalog is required when RMAN is used to take backups from a physical standby database if you plan to recover the primary using those backups.
Answer: B,C,D
NEW QUESTION # 16
A Data Guard environment has this configuration and these attributes:
The primary database prima is in the local region.
A physical standby database physt1 is in the local region.
A physical standby database physt2 is in a remote region.
The primary ships redo to physt1.
physt1 ships redo to physt2.
physt1 and physt2 have Real-Time Query enabled.
A sequence has been created with this SQL statement in the primary database:
CREATE SEQUENCE a NOCACHE SESSION;
Which TWO statements are TRUE?
- A. physt2 will no longer receive redo if physt1 becomes unavailable, unless LOG_ARCHIVE_DEST_n has the ALTERNATE attribute specified on the primary database.
- B. physt2 will no longer receive redo if physt1 becomes unavailable, unless LOG_ARCHIVE_DEST_n has the ALTERNATE attribute specified on physt1.
- C. The sequence is usable on physt1 but not usable on physt2.
- D. The sequence is usable on physt2 if physt1 becomes unavailable, but only if an alternate redo destination has been configured on the primary database.
- E. The sequence is usable on physt1 and physt2.
Answer: A,E
NEW QUESTION # 17
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. Network connectivity to the primary database instance must be defined on the servers hosting the standby database instances.
- C. DG_BROKEB_START must be set to TRUE for a database instance before adding the database to the broker configuration.
- D. 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.
- E. A statically defined listener end-point must be registered with the local listener on the servers hosting the standby database instances.
- F. The primary and standby databases must run the same version of the Oracle Database server.
Answer: B,D,F
Explanation:
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.
Reference:
Oracle Data Guard Broker documentation
Oracle Real Application Clusters Administration and Deployment Guide
NEW QUESTION # 18
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 size of the buffer cache on the physical standby database instances.
- B. Lower DB_BLOCK_CHECKING to MEDIUM or low on the standby databases.
- C. Decrease the redo log file size on the primary database.
- D. Increase the size of standby redo log files on the standby databases.
- E. Increase the number of standby redo log files on the standby databases.
Answer: B,D
Explanation:
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 .
NEW QUESTION # 19
Which TWO statements are true for Data Guard environments with multi-tenant databases?
- A. Different pluggable databases within a logical standby database may have different guard statuses.
- B. The Data Guard broker automatically opens all pluggable databases of a primary database after a role change operation.
- 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 always opens the pluggable databases of a standby database after a role change operation.
- E. A multi-tenant standby database can have fewer pluggable databases than the primary container database.
Answer: A,E
NEW QUESTION # 20
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 database must be available when the above command is run.
- B. The value set using this command is directly stored in the broker configuration file.
- C. The value set using this command is directly applied to the boston database.
- D. The edit database parameter command can only be used to modify the value of a dynamic parameter in a database.
- E. The EDIT DATABASE PARAMETER command can be used to set the value of a static parameter in a database.
Answer: A,C,D
Explanation:
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') .
NEW QUESTION # 21
Which THREE are among the various tasks performed by the Data Guard Monitor (DMON) process?
- A. performing role transitions when switchover requests are made
- B. activating role-based services appropriately in the various database instances of the configuration, based on the database role
- C. communicating with dkon processes in other database instances that are part of the broker configuration
- D. communicating with the DMON process of the observer to monitor a primary database in case a fast start failover is required
- E. maintaining information about all members of the broker configuration in binary configuration files.
Answer: A,B,E
Explanation:
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
NEW QUESTION # 22
Examine this list of possible steps:
1. Raise the compatibility level on both databases.
2. Restart SQL Apply on the upgraded logical standby database.
3. Start SQL Apply on the old primary database.
4. Perform a Switchover to the logical standby database.
5. Upgrade the logical standby database.
6. Upgrade the old primary database.
Which is the minimum number of steps in the correct order, to perform a rolling release upgrade of a data guard environment using an existing logical standby database and to enable the new functionality?
- A. 1,5,2,4,6,3
- B. 5,2,4,1
- C. 5,2,4,6,3,1
- D. 5,2,4,3,6,1
- E. 4,6,5,2,3,1
Answer: A
Explanation:
The process of performing a rolling release upgrade in a Data Guard environment using a logical standby database generally involves these steps:
* Raise the compatibility level on both databases (1): Ensuring both the primary and logical standby databases are operating with the same and correct compatibility level is essential before starting the upgrade process.
* Upgrade the logical standby database (5): Apply the database upgrade to the logical standby first, which allows the primary database to continue serving the workload without interruption.
* Restart SQL Apply on the upgraded logical standby database (2): Once the logical standby has been upgraded, SQL Apply must be restarted to apply the redo data from the primary database, which is still running the earlier version.
* Perform a switchover to the logical standby database (4): After confirming that the logical standby database is successfully applying redo data, perform a switchover to make it the new primary database.
* Upgrade the old primary database (6): With the new primary database now in place, upgrade the old primary database (which is now the new standby) to the new Oracle Database release.
* Start SQL Apply on the old primary database (3): Finally, start SQL Apply on what is now the standby database to synchronize it with the new primary database.References:
* Oracle Data Guard Concepts and Administration Guide
* Oracle Database Upgrade Guide
NEW QUESTION # 23
Which two statements are true regarding Data Guard environments in an Oracle Muti-tenant architecture?
- A. A Data Guard environment with a multi-tenant primary database can operate in any Protection mode.
- B. Standby redo log files are required for each pluggable database that is protected with Data Guard.
- 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. Different redo transport methods can be configured for different pluggable databases within one Data Guard environment.
Answer: A,C
Explanation:
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.
Reference:
Oracle Data Guard Broker documentation
Oracle Multitenant Administrator's Guide
NEW QUESTION # 24
Which THREE are always benefits of using a logical standby database?
- A. It can be used for reporting workloads requiring additional indexes or materialized views or both.
- B. It provides a disaster-recovery solution with switchover and failover options that can recover any data updated on the primary database.
- C. It can be used for testing patchsets without affecting the primary database.
- D. It can be used to replicate a single pluggable database (PDB) in a multitenant container database.
- E. It can be used for database rolling release upgrades.
- F. It can be used as an updatable database for Real Application Testing and then converted back to a standby database without affecting the updates.
Answer: A,B,E
Explanation:
Logical standby databases are a key feature of Oracle Data Guard and offer several distinct advantages, especially in terms of flexibility for reporting, upgrades, and disaster recovery:
* Disaster-recovery solution with switchover and failover options (A): Logical standby databases provide a robust disaster-recovery solution, ensuring that any data updated on the primary database can be recovered. They support both switchover and failover operations, allowing for smooth role transitions between the primary and standby databases.
* Used for reporting workloads requiring additional indexes or materialized views (B): Logical standby databases can be opened for read-write operations and can have additional indexes or materialized views that are not present in the primary database. This makes them ideal for offloading reporting and querying workloads from the primary database.
* Database rolling release upgrades (D): Logical standby databases can be used to perform rolling upgrades of the Oracle Database software. This allows the database to be upgraded with minimal downtime, as the standby database is upgraded first, followed by a switchover to make it the new
* primary.References:
* Oracle Data Guard Concepts and Administration Guide
* Oracle Database High Availability Overview
NEW QUESTION # 25
Examine the Data Guard configuration:
DGMGRL> show configuration;
Configuration - Animals
Protection Mode: MaxAvailability
Databases:
dogs - Primary database
cats - Snapshot standby database
sheep - Snapshot standby database
Fast-Start Failover: DISABLED
Configuration Status:
ORA-01034: ORACLE not available
ORA-16625: cannot reach database "dogs"
DGM-17017: unable to determine configuration status
ou wish to perform a failover to sheep. Which command, or sequence of commands, should you issue to the broker before executing failover to sheep; using the broker?
- A. DGMGRL> convert database sheep to physical standby;
- B. None, because you can directly failover to a Snapshot Standby Database.
- C. DGMGRL> convert database cats to physical standby;
- D. DGMGRL> convert database sheep to physical standby;
DGMGRL> edit configuration set protection mode as maxperformance;
DGMGRL> convert database sheep to physical standby; - E. DGMGRL> convert database cats to physical standby;
Answer: A
NEW QUESTION # 26
Which three Data Guard monitoring activities may be performed using Enterprise Manager Cloud Control?
- A. You can set a warning threshold on the redo generation rate metric for a physical standby database.
- B. You can check if redo apply needs to be tuned.
- C. You can monitor the redo apply rate on a logical standby database.
- D. You can monitor the redo apply rate on a snapshot standby database.
- E. You can set a critical threshold on the redo generation rate metric for a primary database.
- F. You can check the potential data loss in the event of a disaster.
Answer: C,E,F
Explanation:
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.
Reference:
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.
NEW QUESTION # 27
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. 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.
- D. Modifications to the data dictionary on the primary database caused by the upgrade, are applied on a physical standby database.
- E. User equivalence must be established for the owner of the Oracle software on the affected hosts prior to the upgrade.
Answer: C,D
Explanation:
* 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
NEW QUESTION # 28
Your Data Guard environment has a remote physical standby database with real-time query enabled, which is used for reporting, and a logical standby database used for DSS reporting.
Switchovers or failovers are possible due to testing or in case of a disaster.
Clients use local TNSNAMES.ORA files to define connection strings to the database instances.
Which three will prevent clients from connecting to the wrong database instances?
- A. A service name is registered with the local listener of each database instance.
- B. The LOCAL_LISTENER parameter on the primary database instance must always be set.
- C. The standby database services must be defined statically with the Listeners running on the standby database hosts.
- D. The DB_NAME and DB_UNIQUE_NAME parameters must be set to the same value for all the databases in the Data Guard environment.
- E. Oracle Net connectivity to the primary database instance must be established on all the standby database instances.
- F. The client applications must use the correct TNS entries when requesting connections to the database instances.
- G. Client TNS entries for the databases use the correct service names for the intended service.
Answer: C,F,G
Explanation:
Based on Oracle Database 19c: Data Guard Administration documents, the three measures that can prevent clients from connecting to the wrong database instances during switchovers, failovers, or regular operations in a Data Guard environment are:
* B. The standby database services must be defined statically with the Listeners running on the standby database hosts.
* D. The client applications must use the correct TNS entries when requesting connections to the database instances.
* E. Client TNS entries for the databases use the correct service names for the intended service.
* In an Oracle Data Guard configuration, correctly configuring Oracle Net Services (including TNS entries and listeners) is crucial for ensuring that clients connect to the appropriate database instance, whether it's the primary or standby. Defining services on the standby database and associating them with listeners ensures that client applications can connect to the standby when needed, especially useful in a role transition or when the standby is open for read-only access or real-time query. It's essential that TNS entries used by client applications specify the correct service names that correspond to the intended
* database roles, such as primary or standby. This setup facilitates seamless connectivity to the appropriate instance based on the role, especially critical during switchovers and failovers when the roles of the databases change.
* References:Oracle's Data Guard concepts and administration guide provides extensive information on configuring network services for Data Guard environments, ensuring that applications connect to the correct database instance based on the current role of the databases in the Data Guard configuration.
NEW QUESTION # 29
Which three Data Guard monitoring activities may be performed using Enterprise Manager Cloud Control?
- A. You can set a warning threshold on the redo generation rate metric for a physical standby database.
- B. You can check if redo apply needs to be tuned.
- C. You can monitor the redo apply rate on a logical standby database.
- D. You can monitor the redo apply rate on a snapshot standby database.
- E. You can set a critical threshold on the redo generation rate metric for a primary database.
- F. You can check the potential data loss in the event of a disaster.
Answer: C,E,F
Explanation:
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.
NEW QUESTION # 30
Which THREE steps are prerequisites for the creation of a physical standby database on a separate server using the RMAN active database duplication method?
- A. Establish user equivalence for the database software owner between the primary host and standby host.
- B. startup nomount the standby database instance.
- C. Configure Oracle Net connectivity on the primary host to the standby database instance.
- D. Put the primary database into archivelog mode.
- E. Set the DB_UNIQUE_NAME parameter on the primary database to a different value than that of the DB_NAME name parameter.
Answer: A,B,C
Explanation:
Creating a physical standby database using RMAN active database duplication requires certain prerequisites to ensure a successful and seamless operation:
Configure Oracle Net connectivity on the primary host to the standby database instance (A): Proper Oracle Net connectivity between the primary and standby servers is essential for communication and data transfer during the duplication process. Oracle Net services provide the network foundation for Oracle Database, Oracle Net Listener, and Oracle applications.
Establish user equivalence for the database software owner between the primary host and standby host (B): User equivalence ensures that the user who owns the Oracle Database software on the primary server has the same privileges on the standby server. This is crucial for RMAN to perform operations on both servers without encountering permission issues.
Startup nomount the standby database instance (C): The standby database instance needs to be started in the NOMOUNT stage before the duplication can begin. This prepares the environment for creating the control file and restoring the database without mounting it, which is a necessary step in the RMAN duplication process.
Reference:
Oracle Database Backup and Recovery User's Guide
Oracle Data Guard Concepts and Administration
NEW QUESTION # 31
Which four factors can influence the rate of SQL apply on a logical standby database?
- A. the number of applier processes
- B. the number of PREPAER processes
- C. the number of coordinator processes on the standby database instance
- D. the size of the shared pool
- E. the number of full table scans performed by SQL apply
- F. the size of the undo tablespace on the logical standby database
Answer: A,B,C,E
Explanation:
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.
NEW QUESTION # 32
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