Most Recent Oracle 1Z0-076 Exam Dumps

Prepare for the Oracle Database 19c: Data Guard Administration exam with our extensive collection of questions and answers. These practice Q&A are updated according to the latest syllabus, providing you with the tools needed to review and test your knowledge.

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The questions for 1Z0-076 were last updated on Feb 21, 2025.

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Question No. 1

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?

AThe redo transport mode is set to async for the standby database Sheep.

BThe redo transport mode is set to asyn: for the standby database Cats.

CThe redo transport mode is set to async for both standby databases.

DCats is a snapshot standby database.

DCats 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.
Reference:
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.

Show Answer

Correct Answer: D, D

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:

Question No. 2

Which two are true about database roles in an Oracle Data Guard configuration?

AA Physical Standby Database can be converted into a Logical Standby Database.

BA Snapshot Standby Database can be a fast-start failover target.

CA Logical Standby Database can be converted to a Snapshot Standby Database.

DA Logical Standby Database can cascade redo to a terminal destination.

EA configuration consisting only of a primary and one or more physical standby databases can support a rolling release upgrade.

Show Answer

Correct Answer: A, E

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.

Question No. 3

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?

ACreate role based services with the si vet] utility when using clusterware for Oracle RAC databases or Oracle Restart for single instance Oracle databases.

BEstablish Oracle Net connectivity to the primary database instance from all the standby database instances.

CCreate 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.

DCreate database services on each of the standby databases, start the services, and add connection descriptors on the clients to connect to those services.

ECreate 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.

Show Answer

Correct Answer: D, E

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.

Question No. 4

Which THREE are true about using flashback database in a Data Guard environment?

AWhen a flashback database operation is performed on a primary database, a physical standby database is also flashed back automatically.

BYou 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.

CIt may be used to flash back a physical standby that receives redo from a far sync instance.

DYou can use it when real-time apply is enabled in case the physical standby suffers from logical corruption.

EIt may not be used to flash back a primary database after a failover to a physical standby.

FWhen a flashback database operation is performed on a primary database, a logical standby database is also flashed back automatically.

Show Answer

Correct Answer: C, D, E

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. Reference:

Oracle Database Backup and Recovery User's Guide

Oracle Data Guard Concepts and Administration

Question No. 5

You are licensed to use Oracle Active Data Guard.

Which TWO statements are true after enabling block change tracking on a physical standby database?

AIt starts the RVWR process on the physical standby database instance.

BIt starts the CTWR process on the primary database instance.

CIt allows fast incremental backups to be offloaded to a snapshot standby database, when the physical standby database is converted.

DIt starts the CTWR process on the physical standby database instance.

EIt allows fast incremental backups to be offloaded to the physical standby database.

FIt allows fast incremental backups to be taken on the primary database.

Show Answer

Correct Answer: A, E

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. Reference:

Oracle Database Backup and Recovery User's Guide

Oracle Active Data Guard documentation

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