Download Oracle 1z0-076 Exam Dumps to Pass Exam Easily in 2024 [Q30-Q54]

Download Oracle 1z0-076 Exam Dumps to Pass Exam Easily in 2024

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NEW QUESTION # 30
You must configure on Oracle Data .......
1. A primary database
2. Three Physical Standby Databases
Examine these requirements:
A designated physical standby database should become the primary database automatically whenever the primary database fails.
2. The chosen protection mode should provide the highest level of protection possible without violating the other requirement.
Which redo transport mode and protection mode would you configure to meet these requirements?

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

Answer: B

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.
ReferencesOracle Data Guard Concepts and Administration guide, which details the different protection modes and their respective levels of data protection and impact on database operations.

NEW QUESTION # 31
You are planning to perform block comparison using the dbms comp package:

Which TWO statements are true?

• A. The databases should be at least mounted before block comparison.
• B. Logical standby databases can be the target database for the dbms_dbcomp.dbcomp procedure.
• C. It requires that the DB_LOST_WKITE_protect initialization parameter be enabled.
• D. It can be used to detect lost writes and inconsistencies between the primary database and the cascaded standbys.
• E. You can monitor the progress of an ongoing block comparison operation by querying VS SES SION_LONGOPS.

Answer: A,E

Explanation:
The DBMS_COMPARISON package, used for comparing and converging data objects within a single database or between databases, requires that the databases involved in the block comparison be at least mounted (A). This allows the procedure to access the data blocks for comparison. Additionally, the progress of long-running operations such as block comparison can be monitored using the dynamic performance view V$SESSION_LONGOPS (D), which provides information on the operation's progress and estimated completion time.
References:Oracle Database PL/SQL Packages and Types Reference provides comprehensive details on the DBMS_COMPARISON package, including its procedures and how to monitor their progress. Additionally, Oracle Database Reference explains the V$SESSION_LONGOPS view, which is commonly used for monitoring long operations in the database.

NEW QUESTION # 32
Which three are true concerning database states after a successful switchover?

• A. If the former primary database became a physical standby database it will be in the same state as the former physical standby database.
• B. If the former primary database became a physical standby database it will always be open readonly.
• C. The new primary database will be open read-write.
• D. If the former primary database became a logical standby database it will be open read-write.
• E. If the former primary database became a logical standby database it will be in mount state.
• F. The former primary database will always be open.

Answer: A,C,D

Explanation:
After a successful switchover operation in a Data Guard environment, the new primary database (the former standby) will be open read-write (option A). If the former primary database transitions to a logical standby database, it will also be open read-write (option C), allowing it to apply redo data while servicing read-only queries. The former primary, if converted to a physical standby, will adopt the state that the former physical standby database was in prior to the switchover, which can vary based on the configuration prior to the switchover (option D). The state of a physical standby database can range from mounted to open read-only, depending on whether Real-Time Query was enabled. Thus, the exact state will depend on the pre-switchover setup. It's also essential to highlight that options B and E suggest specific states for a former primary turned logical standby, and a former primary turned physical standby, respectively, but these states are not fixed and depend on the configurations set up by the database administrators. References: The answers are corroborated by Oracle's documentation on Data Guard switchovers, specifically in the Oracle Data Guard Concepts and Administration guide, which explains the roles and states of databases in a Data Guard configuration before and after switchovers.

NEW QUESTION # 33
Which three statements are true about snapshot standby databases?

• A. Tablespaces can be created.
• B. The FATLOVER TO command results in a transition of a snapshot standby database to the primary role.
• C. Tables can be dropped.
• D. A logical standby database can be converted into a snapshot standby database.
• E. Tablespaces can be dropped.
• F. The switchover TO command allows a switchover operation to a snapshot standby database.

Answer: A,C,E

Explanation:
A snapshot standby database is a fully updateable standby database that is created by converting a physical standby database into a snapshot standby database. The main characteristics of a snapshot standby database include:
* B: Tablespaces can indeed be dropped in a snapshot standby database because it is updateable and allows all types of DML and DDL operations that do not conflict with the standby role.
* C: Tablespaces can be created in a snapshot standby database for the same reasons that they can be
* dropped; it supports all operations that do not interfere with its standby nature.
* E: Tables can be dropped in a snapshot standby database, as it is a fully updateable standby.
Options A and D are incorrect because 'FAILOVER TO' and 'SWITCHOVER TO' commands are not used with snapshot standby databases in these contexts. A failover converts a standby database into the primary role after the original primary has become unavailable, and is not a reversible role transition. Switchover is a planned role reversal between the primary database and one of its standby databases and is not applicable to snapshot standby databases in the context provided.
Option F is incorrect because a logical standby database cannot be converted into a snapshot standby database directly. A logical standby is used for different purposes such as reporting and querying with real-time data, and its structure is different from a physical standby which can be converted into a snapshot standby.
References: Oracle Data Guard Concepts and Administration guide details the operations allowed on snapshot standby databases and the processes for transitioning between physical, snapshot, and logical standby databases.

NEW QUESTION # 34
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. 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.
• B. Adding a database to the Sales configuration with DGMGRL automatically adds the database to the Prod Pool.
• C. DGMGRL may be used to add a single database to the Sales configuration even if Sales is a member of 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: C,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 # 35
A customer has these requirements for their proposed Data Guard implementation:
1. Zero data loss must still be guaranteed through the loss of any one configuration component.
2. The primary database must be protected against a regional disaster.
3. Performance overheads on the primary should be minimized as much as possible given these requirements.
4. Downtime on the primary database for any reason must be kept to a minimum.
Components referred to in the broker commands are:

• A.
• B.
• C.
• D.

Answer: D

Explanation:
According to the requirements stated:
* Zero data loss must be guaranteed despite the loss of any one component: This necessitates synchronous redo transport to at least one standby database (for no data loss).
* The primary database must be protected against a regional disaster: This implies that there must be a standby database in a different region.
* Performance overhead on the primary should be minimized: This suggests that asynchronous transport should be used where possible to reduce the performance impact on the primary.
* Downtime on the primary for any reason must be kept to a minimum: This is indicative of a requirement for a fast failover mechanism, possibly with a fast-start failover (FSFO) and high availability.
Given these requirements, the appropriate option that fulfills all these is:
* Option C, where 'prima' is the primary database, 'fs1' is the Far Sync instance in the primary region, and
'physt' and 'physt2' are physical standby databases in the primary and remote regions, respectively. In this configuration:
* 'prima' is set to send redo to 'fs1' using SYNC to guarantee zero data loss.
* 'fs1' is set to send redo to 'physt' (local standby) using FASTSYNC, which is a low-latency synchronous transport that is optimized for performance.
* The Data Guard configuration's protection mode is set to MAXAVAILABILITY to provide the highest level of data protection that is possible without compromising the availability of the primary database.
This configuration ensures that there is zero data loss even if the primary region is completely lost, maintains performance by limiting the synchronous transport to the local region with a Far Sync instance, and has a remote standby database in a separate region for disaster recovery purposes.
References:
* Oracle Data Guard Concepts and Administration
* Oracle Data Guard Broker documentation

NEW QUESTION # 36
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. Enterprise Manager Cloud Control
• B. RMAN
• C. DGMGRL
• D. SQL*Plus
• E. GDCCTL
• F. SRVCTL
• G. CRSCTL

Answer: A,C

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 # 37
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 Only.
• B. Set STANDBY_FILE_MANAGEMENT to auto in the london database.
• C. Set STANDBY_PDB_SOURCE_FILE_DIRECTORY to <location of the PDB> in the london database.
• D. Enable Active Data Guard in the _ondon database.
• E. Open PDBI (remote clone source) in Read Write.
• F. Set standby_pdb_source_file_dblink to clone_link in the london database.

Answer: A,B,C

Explanation:
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

NEW QUESTION # 38
You created the PRODSBY1 physical standby database for the PROD primary database using gql and RMAN.
You are planning to create a Data Guard Broker configuration. You execute the command:

Which three statements are true regarding the execution of the command?

• A. The PRODSBY1 standby database is automatically added to the configuration if DG_BROKER_START is TRUE for PRODSBYl.
• B. The command will execute successfully only if Oracle Net connectivity to the PROD database instance is defined on the primary host.
• C. The command will execute successfully only if the DG_BROKER_START initialization parameter is set to TRUE for the PROD database instance.
• D. The command will execute successfully only if Oracle Net connectivity to the PROD and PRODSBYl database instances are defined on the primary host.
• E. The Data Guard Broker configuration files is automatically created in the destinations specified by the DG_BROKER_CONFIG_FILEn initialization parameters on the primary database.
• F. The PRODSBYI standby database is automatically added to the configuration if Oracle Net connectivity to the PRODSBYl database instance is defined on the primary host.

Answer: B,C,E

Explanation:
The command executed (CREATE CONFIGURATION 'DGConfig' AS PRIMARY DATABASE IS ' PROD' CONNECT IDENTIFIER IS PROD;) is used to create a Data Guard Broker configuration named
'DGConfig'. The successful execution of this command depends on several conditions:
* A: The DG_BROKER_START parameter must be set to TRUE on the primary database to start the Data Guard Broker processes. Without the broker processes running, the configuration cannot be created.
* D: Oracle Net connectivity to the PROD database instance must be established on the primary host. This is because the Data Guard Broker requires network accessibility to communicate with the primary database and manage the configuration.
* E: When the configuration is created, the Data Guard Broker configuration files are indeed automatically created in the locations specified by the DG_BROKER_CONFIG_FILEn parameters on the primary database.
It's important to note that the command will not automatically add the PRODSBY1 standby database to the configuration (thus B and C are not correct), and there is no requirement for the standby database to have Oracle Net connectivity defined on the primary host for the execution of this command (making F incorrect as well).
References: This information can be validated in Oracle's Data Guard Broker documentation, which outlines the requirements for setting up and managing a Data Guard configuration using the Data Guard Broker.

NEW QUESTION # 39
Which THREE statements are TRUE about the supported workload in Active Data Guard standby databases?

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

Answer: B,C,E

Explanation:
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.

NEW QUESTION # 40
Which two are prerequisites for configuring flashback database for Oracle 19c databases, in a Data Guard environment?

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

Answer: C,D

Explanation:
* 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

NEW QUESTION # 41
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. It will execute successfully on an Oracle 19c logical standby database while SQL apply is active.
• B. 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.
• C. It will execute successfully on an Oracle 19c physical standby database while Real Time Query is active.
• 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 open.
• F. It will execute successfully while an Oracle 19c primary database is mounted.

Answer: A,E,F

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 # 42
You are licensed to use Oracle Active Data Guard.
Which TWO statements are true after enabling block change tracking on a physical standby database?

• A. It allows fast incremental backups to be offloaded to the physical standby database.
• B. It allows fast incremental backups to be taken on the primary database.
• C. It starts the CTWR process on the physical standby database instance.
• D. It allows fast incremental backups to be offloaded to a snapshot standby database, when the physical standby database is converted.
• E. It starts the RVWR process on the physical standby database instance.
• F. It starts the CTWR process on the primary database instance.

Answer: A,E

Explanation:
Block change tracking is a feature that enhances the efficiency of incremental backups by recording changed blocks in a tracking file. When used with Oracle Active Data Guard:
* It starts the RVWR process on the physical standby database instance (A): When block change tracking is enabled on a physical standby database, the Recovery Writer (RVWR) process is initiated.
This process is responsible for recording the changes to blocks in the block change tracking file, which is then used to optimize incremental backups.
* It allows fast incremental backups to be offloaded to the physical standby database (E): With block change tracking enabled on the physical standby database, fast incremental backups can be offloaded from the primary database. This reduces the workload on the primary database and utilizes the standby database for backup operations, improving overall system performance and efficiency.References:
* Oracle Database Backup and Recovery User's Guide
* Oracle Active Data Guard documentation

NEW QUESTION # 43
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. startup nomount the standby database instance.
• B. Configure Oracle Net connectivity on the primary host to the standby database instance.
• C. Put the primary database into archivelog mode.
• D. Establish user equivalence for the database software owner between the primary host and standby host.
• 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,D

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

NEW QUESTION # 44
Which THREE are always benefits of using a logical standby database?

• A. It can be used as an updatable database for Real Application Testing and then converted back to a standby database without affecting the updates.
• B. It can be used for testing patchsets without affecting the primary database.
• C. It can be used for database rolling release upgrades.
• D. It provides a disaster-recovery solution with switchover and failover options that can recover any data updated on the primary database.
• E. It can be used for reporting workloads requiring additional indexes or materialized views or both.
• F. It can be used to replicate a single pluggable database (PDB) in a multitenant container database.

Answer: C,D,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 # 45
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 physical standby for real-time apply.
• C. They are required only for synchronous redo transport
• D. They are required on a logical standby for real-time apply
• E. It is recommended to have them on the...
• F. Only standby databases can write redo....

Answer: A,B,D

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

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

Answer: A,B,C

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 # 47
You must design an Oracle Data Guard configuration for a DSS database that meets these permanent requirements:
1. Creating and maintaining bitmap indexes should not impact the performance of the primary database.
2. Creating and maintaining materialized views should not impact the performance of the primary database.
Additionally, there are these requirements, only one of which is ever done at any one time:
1. It should be possible to apply designated patches with a minimum amount of downtime.
2. Upgrading to a new database release should be performed with the least possible amount of downtime.
3. New application software releases should be tested against an exact and up-to-date replica of the primary database.
Which configuration meets these requirements with the fewest of databases?

• A. A primary database with one logical and one physical standby database
• B. a primary database with two logical standby databases
• C. a primary database with one logical standby database
• D. a primary database with two physical standby databases
• E. a primary database with one physical standby database

Answer: C

Explanation:
* Logical standby databases allow the execution of DDL and DML operations, which makes them suitable for maintaining bitmap indexes and materialized views without affecting the performance of the primary database .
* Logical standby databases can be used for performing rolling upgrades and patching with minimum downtime, meeting another requirement .
* They also enable the testing of new application software releases against an up-to-date replica of the primary database, fulfilling the last requirement.
Other configurations involving physical standby databases or combinations of logical and physical standby databases might not meet all the specified requirements as efficiently or with the same level of performance isolation for the primary database.

NEW QUESTION # 48
Which TWO observations are true about the Far Sync instance?

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

Answer: A,E

Explanation:
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.

NEW QUESTION # 49
Which three types of backups offload ........ with the primary database in a data Guard

• A. Archive logs
• B. Password files
• C. Online logs
• D. Data files
• E. Control files
• F. Broker configuration files

Answer: A,D,E

Explanation:
In a Data Guard environment, you can offload the backups of certain database components to a physical standby database. Incremental backups of a standby database are interchangeable with the primary database, meaning you can apply a backup taken on a standby database to a primary database and vice versa. This includes control files, data files, and archive logs. Backups of control files and nonstandby control files are interchangeable. You can restore a standby control file on a primary database and a primary control file on a physical standby database, demonstrating their interchangeability and the ability to offload control file backups to one database in a Data Guard environment.

NEW QUESTION # 50
Examine the Data Guard configuration:
DGMGRL> show configuration;
Configuration - Animals
Protection Mode: Max Availability
Databases:
dogs - Primary database sheep
- Physical standby database cats
- Physical standby database
Fast-Start Failover: DISABLED
Configuration Status: SUCCESS
An attempt to enable fast-start failover raises an error:
DGMGRL> enable fast_start failover;
Error: ORA-16693: requirements not met for enabling fast-start failover Failed.
Identify three possible reasons for this error.

• A. The fastStartFailoverTarget property is not set on Dogs.
• B. The LogxptModr property is set to async on Sheep while Sheep is the target standby database.
• C. The LogXptMode property is set to async on Dogs.
• D. The LogXptMode property is set to fastsync on Dogs.
• E. The LogXptMode property is set to FASTSYNC on Cats while Sheep is the target standby database.

Answer: A,B,C

Explanation:
When enabling fast-start failover, certain conditions must be met:
* The fastStartFailoverTarget property is not set on Dogs (A): The primary database (Dogs) needs to have a fast-start failover target configured for the operation to succeed.
* The LogXptMode property is set to ASYNC on Sheep while Sheep is the target standby database (B): Fast-start failover requires synchronous redo transport (SYNC or FASTSYNC) to ensure zero data loss, which is a prerequisite for enabling the feature.
* The LogXptMode property is set to ASYNC on Dogs (D): Similar to the previous point, the primary database must be configured to use synchronous redo transport for the fast-start failover to be possible.
References:
* Oracle Data Guard Broker documentation
* Oracle Database Error Messages Guide

NEW QUESTION # 51
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 DB_NAME and DB_UNIQUE_NAME parameters must be set to the same value for all the databases in the Data Guard environment.
• B. A service name is registered with the local listener of each database instance.
• C. The client applications must use the correct TNS entries when requesting connections to the database instances.
• D. The LOCAL_LISTENER parameter on the primary database instance must always be set.
• E. The standby database services must be defined statically with the Listeners running on the standby database hosts.
• F. Oracle Net connectivity to the primary database instance must be established on all the standby database instances.
• G. Client TNS entries for the databases use the correct service names for the intended service.

Answer: C,E,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 # 52
Which two are true about database roles in an Oracle Data Guard configuration?

• A. A Logical Standby Database can be converted to a Snapshot Standby Database.
• B. A Snapshot Standby Database can be a fast-start failover target.
• C. A Logical Standby Database can cascade redo to a terminal destination.
• D. A configuration consisting only of a primary and one or more physical standby databases can support a rolling release upgrade.
• E. A Physical Standby Database can be converted into a Logical Standby Database.

Answer: D,E

Explanation:
A Physical Standby Database can indeed be converted into a Logical Standby Database, providing flexibility in a Data Guard configuration. This allows for the database to switch roles and supports SQL apply operations, enabling more granular control over the data and transactions being replicated and applied. Additionally, having a configuration with a primary database and one or more physical standby databases allows for rolling upgrades to be performed. This means that each database in the Data Guard configuration can be upgraded in a phased manner, minimizing downtime and ensuring high availability during the upgrade process.

NEW QUESTION # 53
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 phylt may not be used to flash back a primary database after a failover to a logical standby.
• C. You can use it when real-time apply is enabled in case the physical standby suffers from logical corruption.
• 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: C,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 # 54
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