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Verified 1z1-076 Q&As - Pass Guarantee 1z1-076 Exam Dumps [Q17-Q38]

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Verified 1z1-076 Q&As - Pass Guarantee 1z1-076 Exam Dumps

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NEW QUESTION # 17
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 value set using this command is directly applied to the boston database.
  • B. The edit database parameter command can only be used to modify the value of a dynamic parameter in a database.
  • C. The database must be available when the above command is run.
  • D. The value set using this command is directly stored in the broker configuration file.
  • E. The EDIT DATABASE PARAMETER command can be used to set the value of a static parameter in a database.

Answer: A,B,C

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 # 18
Your Data Guard environment contains a primary database and three standby databases with these attributes:
1. prod : Primary database
2. prod_prq : Physical standby database with real-time query enabled used by reporting applications
3. prod_lsby: Logical standby database used by DSS
4. PROD_SSBY: Snapshot standby database used for Real Application Testing Which TWO can be used to prevent clients from connecting to the wrong database instance?

  • A. Create database services for each database and use event triggers to make sure that services are activated only when the database is in the correct role.
  • B. Create role based services with the si vet] utility when using clusterware for Oracle RAC databases or Oracle Restart for single instance Oracle databases.
  • C. Establish Oracle Net connectivity to the primary database instance from all the standby database instances.
  • D. Create database services on each of the standby databases, start the services, and add connection descriptors on the clients to connect to those services.
  • E. Create a static service for each of the databases, register it with the local listener of each database instance, and add connection descriptors on clients to connect to those services.

Answer: A,D

Explanation:
Creating dedicated database services for each database instance (Option D) and utilizing event triggers to manage these services based on the role of the database (Option E) ensure that clients connect to the appropriate database instance based on its current role and state. This approach leverages the flexibility and control provided by Oracle Net services and database event management to direct client connections to the suitable primary or standby instance, enhancing the overall robustness and reliability of the Data Guard environment. References: Based on Oracle Database 19c best practices for managing connectivity and services in a Data Guard setup, including the use of role-based services and event-driven service management.


NEW QUESTION # 19
Which two statements are true when using non-rolling release upgrades in a Data Guard environment?

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

Answer: A,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 # 20
You must configure flashback database for your Oracle 19c databases that will be part of a Data Guard Broker configuration.
The databases are all in ARCHIVELOG mode.
You will execute the SQL statement:
ALTER DATABASE FLASHBACK ON;
Which three are true concerning this command?

  • A. If executed successfully on an Oracle 19c primary database, flashback will also be enabled on all physical standby databases that are part of the configuration.
  • B. It will execute successfully on an Oracle 19c logical standby database while SQL apply is active.
  • C. It will execute successfully while an Oracle 19c primary database is open.
  • D. If executed successfully on an Oracle 19c primary database, flashback will also be enabled on all logical standby databases that are part of the configuration.
  • E. It will execute successfully while an Oracle 19c primary database is mounted.
  • F. It will execute successfully on an Oracle 19c physical standby database while Real Time Query is active.

Answer: B,C,E

Explanation:
The command ALTER DATABASE FLASHBACK ON; enables the Flashback Database feature, which provides a way to quickly revert an entire Oracle database back to a previous point in time. This command can be executed while an Oracle 19c primary database is either open (option A) or mounted (option B). It is also applicable to an Oracle 19c logical standby database while SQL Apply is active (option E). However, it's important to note that enabling Flashback Database on the primary does not automatically enable it on all associated standby databases, whether they are physical or logical. Each database in a Data Guard configuration must have Flashback Database explicitly enabled if desired. Real Time Query being active on a physical standby does not directly relate to the ability to execute this command on the standby. References:
The explanation is based on Oracle's concepts for Flashback Technology and Data Guard configurations as detailed in the Oracle Database Backup and Recovery User's Guide and the Oracle Data Guard Concepts and Administration guide.


NEW QUESTION # 21
Which three statements are true....... With no Oracle Streams or Goldengate configured?

  • A. The LGWR process writes to them on ....
  • B. They are required on a logical standby for real-time apply
  • C. They are required only for synchronous redo transport
  • D. It is recommended to have them on the...
  • E. Only standby databases can write redo....
  • F. They are required on a physical standby for real-time apply.

Answer: A,B,F

Explanation:
C; The LGWR (Log Writer) process is responsible for writing redo entries from the redo log buffer to the online redo log files on the primary database. This is a fundamental process in the Oracle Database architecture, ensuring that all changes made to the database are captured for purposes such as recovery, replication, and high availability.
D; Real-time apply on a logical standby database requires standby redo log files. The standby redo log files are used to store redo data received from the primary database before it is applied to the logical standby database.
This enables the logical standby to apply changes as they are received, without waiting for the current redo log file to be archived.
E: Similarly, on a physical standby database, standby redo log files are used for real-time apply. They store redo data from the primary database, allowing the physical standby to apply redo data concurrently as it is received, rather than waiting for redo log files to be archived. This capability is crucial for maintaining a physical standby database that is closely synchronized with the primary database with minimal lag.
These functionalities are integral to Oracle Data Guard configurations and are not dependent on Oracle Streams or Oracle GoldenGate, which are separate technologies for data replication and integration.


NEW QUESTION # 22
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 logical 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 physical 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.

Answer: B,D,F

Explanation:
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.References:
* Oracle Database Backup and Recovery User's Guide
* Oracle Data Guard Concepts and Administration


NEW QUESTION # 23
You notice that the SQL apply lag on your logical standby database has increased but the redo transport lag has not.
Which four could be reasons for the increase in SQL apply lag?

  • A. An increased number of bulk updates on the primary
  • B. An undersized undo tablespace on the logical standby
  • C. The standby redo log files are undersized on the primary database
  • D. An undersized shared pool
  • E. An increased number of bulk inserts on the primary
  • F. Many SQL apply operations do full table scans

Answer: A,B,D,F

Explanation:
The SQL apply lag on a logical standby database can be caused by several factors:
* A: An undersized undo tablespace can lead to delays in SQL apply operations as it may not be able to handle the volume of undo records generated by the SQL apply process.
* B: SQL apply operations that do full table scans can consume significant system resources, potentially leading to higher apply lag.
* C: An increased number of bulk updates on the primary database may generate a large volume of redo data, which can cause apply lag if the logical standby cannot apply the changes quickly enough.
* F: An undersized shared pool may affect the parsing and execution of SQL statements by SQL apply, which can contribute to the apply lag.
Option D is less likely to be a direct cause of SQL apply lag compared to bulk updates, as inserts generate new data rather than modifying existing data, which SQL apply can typically handle more efficiently.
Option E is incorrect because the size of the standby redo log files on the primary database impacts redo transport lag, not SQL apply lag.
References: Oracle Database High Availability Overview and Oracle Data Guard Concepts and Administration guide provide insights into the factors affecting SQL apply performance on logical standby databases.


NEW QUESTION # 24
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. RMAN
  • B. SQL*Plus
  • C. GDCCTL
  • D. Enterprise Manager Cloud Control
  • E. CRSCTL
  • F. SRVCTL
  • G. DGMGRL

Answer: D,G

Explanation:
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.


NEW QUESTION # 25
Which four factors can influence the rate of SQL apply on a logical standby database?

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

Answer: A,C,E,F

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.
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.


NEW QUESTION # 26
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 # 27
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 logical 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 physical 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.

Answer: B,D,F


NEW QUESTION # 28
Which THREE statements are true about Far Sync instances?

  • A. The Data Guard Broker must be used to deploy and manage Far Sync instances.
  • B. A primary database can ship redo directly to multiple Far Sync instances.
  • C. They enable standby databases to be configured at remote distances from the primary without impacting performance on the primary.
  • D. They use an spfMe, a standby controlfile, and standby redo logs.
  • E. They work with any protection level.

Answer: A,B,C

Explanation:
Far Sync instances are a feature of Oracle Data Guard designed to support zero data loss protection over long distances:
* The Data Guard Broker must be used to deploy and manage Far Sync instances (A): Data Guard Broker simplifies the deployment and management of Far Sync instances, which are an integral part of zero data loss protection configurations.
* They enable standby databases to be configured at remote distances from the primary without impacting performance on the primary (C): Far Sync instances are designed to receive redo from the primary database and then forward it to a remote standby database, thereby avoiding any performance
* impact on the primary database itself.
* A primary database can ship redo directly to multiple Far Sync instances (E): A primary database can be configured to send redo logs to more than one Far Sync instance, which can then forward the redo to their respective remote standby databases.References:
* Oracle Data Guard Concepts and Administration Guide
* Oracle Database High Availability Overview


NEW QUESTION # 29
Examine this query and its output:

Which two statements are true?

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

Answer: A,E

Explanation:
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.


NEW QUESTION # 30
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. The standby database services must be defined statically with the Listeners running on the standby database hosts.
  • B. Oracle Net connectivity to the primary database instance must be established on all the standby database instances.
  • C. The client applications must use the correct TNS entries when requesting connections to the database instances.
  • D. A service name is registered with the local listener of each database instance.
  • E. Client TNS entries for the databases use the correct service names for the intended service.
  • F. The LOCAL_LISTENER parameter on the primary database instance must always be set.
  • G. The DB_NAME and DB_UNIQUE_NAME parameters must be set to the same value for all the databases in the Data Guard environment.

Answer: A,C,E

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 # 31
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 the primary database is automatically recovered, using a block from a flashback log from the primary database.
  • D. A corrupt block on a standby database with Real-Time Query enabled, is automatically recovered, using flashback logs from the standby database.
  • E. A corrupt block on the primary database can be automatically recovered, using a block from a standby database with Real-Time Query enabled.

Answer: C,E

Explanation:
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


NEW QUESTION # 32
Examine the Data Guard configuration:

Which three will be true after a successful failover to Cats?

  • A. Sheep will be in the disabled state.
  • B. Sheep will be in the enabled state.
  • C. The configuration will be in Maximum Availability mode.
  • D. Dogs will be in the disabled state and has to be manually reinstated.
  • E. The configuration will be in Maximum Performance mode.

Answer: B,C,D

Explanation:
After a successful failover to the 'cats' database in a Data Guard configuration:
* B: Sheep, being another standby database, would typically remain in the enabled state unless specifically disabled or if there was a configuration issue.
* D: Dogs, which was the primary database prior to failover, will be in a disabled state as part of the failover process. Manual intervention is required to re-establish 'dogs' as a standby database or to return it to the primary role through another role transition.
* E: If the configuration was in Maximum Availability mode before failover, it would remain in this mode after failover, provided all settings were properly configured and no changes were made to the protection mode.
Option A is incorrect because failover does not automatically change the protection mode to Maximum Performance. The protection mode remains as it was prior to the failover unless manually altered.
References: The behavior of Oracle Data Guard during failover and the resulting configuration state is described in the Oracle Data Guard Broker documentation.


NEW QUESTION # 33
Examine this validate command:
DGMGRL> VALIDATE DATABASE VERBOSE "<database name>";
Which THREE statements are TRUE?

  • A. The command performs a comprehensive set of database checks prior to a role change.
  • B. The command can be used for a logical standby database.
  • C. The command performs a comparison of SPFILE entries between the primary database and a specified standby database.
  • D. The command uses information available in various Oracle Data Guard views as well as the Automatic Diagnostic Repository.
  • E. The command performs network connectivity checks between members of a broker configuration.

Answer: A,B,E

Explanation:
* The command performs a comprehensive set of database checks prior to a role change (A): The VALIDATE DATABASE command in Data Guard Manager (DGMGRL) is designed to perform an exhaustive check of a specified database's readiness for a role change, such as a switchover or failover.
* The command performs network connectivity checks between members of a broker configuration (C): One of the checks includes verifying that the necessary network connectivity exists between the databases in a Data Guard Broker configuration.
* The command can be used for a logical standby database (D): The VALIDATE DATABASE command is versatile and can be used for both physical and logical standby databases to ensure their readiness for role changes.
References:
* Oracle Data Guard Broker documentation
* Oracle Data Guard Concepts and Administration Guide


NEW QUESTION # 34
Which three actions are performed by the START PLAN procedure of the DBMS ROLLING package?

  • A. creating a guaranteed restore point on the standby databases
  • B. creating a guaranteed restore point on the primary database
  • C. converting the designated physical standby database into a logical standby database
  • D. starting media recovery on all the Leading Group Standby databases
  • E. switching the primary database to the logical standby role
  • F. building a LogMiner dictionary on the primary database instance

Answer: A,B,F

Explanation:
The DBMS_ROLLING package facilitates a rolling upgrade process across a Data Guard configuration. The START PLAN procedure in particular handles several critical actions, including:
* Creating a guaranteed restore point on the standby databases (B): This ensures that the standby databases can be reverted to their state before the rolling upgrade process in case of any issues.
* Building a LogMiner dictionary on the primary database instance (C): This is necessary for logical standby databases to interpret redo data during the SQL Apply process.
* Creating a guaranteed restore point on the primary database (D): Similar to the standby databases, this ensures that the primary database can be reverted to a known good state if necessary.References:
* Oracle Database PL/SQL Packages and Types Reference
* Oracle Data Guard Concepts and Administration Guide


NEW QUESTION # 35
Which THREE statements are true........ open in real time query mode, which becomes a new.

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

Answer: A,B,D

Explanation:
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


NEW QUESTION # 36
Which TWO are benefits of using Transaction Guard in a Data Guard environment?

  • A. It provides application continuity by rolling back uncommitted transactions interrupted by a failover or switchover.
  • B. It protects against logical corruptions being replicated to standby databases.
  • C. It provides application continuity by replaying transactions interrupted by a failover or a switchover
  • D. It protects against user errors being replicated to standby databases.
  • E. It protects against recoverable errors during a planned or an unplanned outage of a primary database.

Answer: A,E

Explanation:
Transaction Guard provides benefits in terms of transaction consistency and recovery in a Data Guard environment:
* It provides application continuity by rolling back uncommitted transactions interrupted by a failover or switchover (B): Transaction Guard ensures that any uncommitted transactions at the time of an outage are rolled back consistently, thus preserving the integrity of the application's data and state.
* It protects against recoverable errors during a planned or an unplanned outage of a primary database (D): Transaction Guard offers protection against errors that can occur during outages, allowing applications to resume operations more quickly and reliably after recovery.References:
* Oracle Database High Availability Overview
* Oracle Real Application Clusters Administration and Deployment Guide


NEW QUESTION # 37
Which THREE statements are true about snapshot standby databases?

  • A. A snapshot standby database may be opened read-only.
  • B. A snapshot standby database may be opened read-write.
  • C. FLASHBACK DATABASE is enabled automatically on a physical standby database as part of the conversion into a snapshot standby database, if not already enabled.
  • D. FLASHBACK DATABASE must be manually enabled on a physical standby database before converting it into a snapshot standby database.
  • E. A snapshot standby database can have Real-Time apply enabled.
  • F. FLASHBACK DATABASE is enabled automatically on a snapshot standby database after converting it from a physical standby database if not already enabled.

Answer: B,C,F

Explanation:
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.
References:
* Oracle Data Guard Concepts and Administration
* Oracle Database Backup and Recovery User's Guide


NEW QUESTION # 38
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