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Oracle Database 19c: Data Guard Administration Sample Questions (Q68-Q73):

NEW QUESTION # 68
Which three statements are true about redo transport?

A. Multiple RFS processes may receive redo on one standby database instance.
B. With asynchronous redo transport, TTnn processes may read redo from the log buffer or from standby redo logs on the primary database.
C. An RFS process on a standby database instance may receive redo from an archiver process on the primary database instance to perform archive gap resolution.
D. Multiple RFS processes may receive redo on one far sync instance.
E. With synchronous redo transport, LGWR ships redo directly to RFS processes on the standby database instances and waits for an acknowledgment.

Answer: A,C,E

NEW QUESTION # 69
Active Data Guard (ADG) databases are widely used to offload reporting or ad hoc query-only jobs from the primary database. Reporting workload profile is different from the primary database and often requires tuning.
Which tool is used to tune SQL workloads running on an ADG database?

A. Automatic Diagnostic Database Monitor (ADDM)
B. SQL Tuning Advisor
C. In-Memory Active Session History (ASH)
D. Automatic Workload Repository (AWR)
E. Standby Statspack

Answer: D

Explanation:
AWR collects, processes, and maintains performance statistics for problem detection and self-tuning purposes.
In an Active Data Guard environment, where the physical standby database can be used for read-only workloads, AWR can be instrumental in identifying performance bottlenecks and areas for optimization. It provides detailed reports that include wait events, time model statistics, and active session history, making it an invaluable tool for tuning SQL queries and overall database performance in an ADG setup.

NEW QUESTION # 70
Which two statements are true regarding Data Guard environments in an Oracle Muti-tenant architecture?

A. PDB_FILE_NAME CONVERT must be set to enable creation of standby databases if they are created on the same host as the primary.
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. A Data Guard environment with a multi-tenant primary database can operate in any Protection mode.
E. Different redo transport methods can be configured for different pluggable databases within one Data Guard environment.

Answer: C,D

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

NEW QUESTION # 71
Which THREE are always benefits of using a logical standby database?

A. It provides a disaster-recovery solution with switchover and failover options that can recover any data updated on the primary database.
B. It can be used for testing patchsets without affecting the primary database.
C. It can be used as an updatable database for Real Application Testing and then converted back to a standby database without affecting the updates.
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 for reporting workloads requiring additional indexes or materialized views or both.

Answer: A,E,F

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.
Reference:
Oracle Data Guard Concepts and Administration Guide
Oracle Database High Availability Overview

NEW QUESTION # 72
Examine the fast-start failover configuration:

A. The observer will initiate a failover when the primary database is unable to produce local archived redo log files.
B. The observer is running.
C. A failover may occur if the observer has lost connectivity to the primary database, even if the Fast-Start Failover target standby database has a good connection to the primary database
D. If South_Sales develops a problem and cannot be the target of a failover, the broker automatically changes the fast-start failover target to one of the other candidate targets.
E. You must disable fast-start failover first to change the fast-start failover target to East sales.

Answer: A,B,C

NEW QUESTION # 73
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Oracle Database 19c: Data Guard Administration Sample Questions (Q68-Q73):

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