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Oracle Database 19c: Data Guard Administration Sample Questions (Q76-Q81):

NEW QUESTION # 76
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. Establish Oracle Net connectivity to the primary database instance from all the standby database instances.
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. Create database services on each of the standby databases, start the services, and add connection descriptors on the clients to connect to those services.
D. 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.
E. 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.

Answer: C,E

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. Reference: 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 # 77
A customer asks for your recommendation regarding this requirement:
1. We plan to have a Data Guard Configuration with one primary database and one physical standby database.
2. We want zero data loss in case of a disaster involving the loss of one component.
3. We want to do Real Application Testing occasionally on the Standby Database.
Which solution, if any, satisfies these requirements?

A. A snapshot standby database with real time query that can be converted regularly into a physical standby database open read write, to do real application testing
B. A physical standby database with synchronous redo transport that can be converted regularly into a snapshot standby to do real application testing
C. These requirements cannot be met.
D. A far sync instance plus a snapshot standby database and real time apply that can be converted regularly into logical standby database to do real application testing

Answer: B

Explanation:
* Synchronous redo transport for zero data loss (B): To guarantee zero data loss in the case of a disaster, synchronous redo transport must be configured between the primary and standby databases.
* Conversion to snapshot standby for testing (B): A physical standby database can be temporarily converted into a snapshot standby database to perform real application testing. After testing is completed, the snapshot standby can be converted back to a physical standby to resume its disaster recovery role.
References:
* Oracle Data Guard Concepts and Administration Guide
* Oracle Database Testing Guide

NEW QUESTION # 78
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 one physical standby database
C. a primary database with one logical standby database
D. a primary database with two physical standby databases
E. a primary database with two logical standby databases

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 # 79
A customer asks for your recommendation regarding this requirement:
1. We plan to have a Data Guard Configuration with one primary database and one physical standby database.
2. We want zero data loss in case of a disaster involving the loss of one component.
3. We want to do Real Application Testing occasionally on the Standby Database.
Which solution, if any, satisfies these requirements?

A. A snapshot standby database with real time query that can be converted regularly into a physical standby database open read write, to do real application testing
B. A physical standby database with synchronous redo transport that can be converted regularly into a snapshot standby to do real application testing
C. These requirements cannot be met.
D. A far sync instance plus a snapshot standby database and real time apply that can be converted regularly into logical standby database to do real application testing

Answer: B

Explanation:
Synchronous redo transport for zero data loss (B): To guarantee zero data loss in the case of a disaster, synchronous redo transport must be configured between the primary and standby databases.
Conversion to snapshot standby for testing (B): A physical standby database can be temporarily converted into a snapshot standby database to perform real application testing. After testing is completed, the snapshot standby can be converted back to a physical standby to resume its disaster recovery role.
Reference:
Oracle Data Guard Concepts and Administration Guide
Oracle Database Testing Guide

NEW QUESTION # 80
Which THREE statements are true........ open in real time query mode, which becomes a new.

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

Answer: A,B,F

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.
Reference
Oracle Data Guard Concepts and Administration
Oracle Database Licensing Information User Manual
Oracle Data Guard Broker User Manual

NEW QUESTION # 81
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Oracle Database 19c: Data Guard Administration Sample Questions (Q76-Q81):

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