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  1. Home
  2. Oracle Certification
  3. 1z0-076 Exam
  4. Oracle.1z0-076.v2024-07-15.q25 Dumps
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Question 1

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:

Correct Answer: C
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
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Question 2

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?

Correct Answer: A,B,C
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
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Question 3

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?

Correct Answer: A,B,C,F
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.
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Question 4

Which two statements are true regarding Data Guard environments in an Oracle Muti-tenant architecture?

Correct Answer: B,E
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.References:
* Oracle Data Guard Broker documentation
* Oracle Multitenant Administrator's Guide
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Question 5

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.

Correct Answer: E
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
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