Free 1Z0-076 Practice Test Questions and Answers (2026) Practice Questions

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. Reference: 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.

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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.

Reference: 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.

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A static service must be registered with the local listener to enable DGMGRL to restart instances

during the course of broker operations (A): For DGMGRL (Data Guard Manager Command-Line

Interface) to perform instance management operations, such as restarting instances, a static service

registration in the listener is required. This allows the broker to connect to the database instance

even when the instance is not fully up and the dynamic service registration is not available.

Installing the oracle-database-preinstall-19c package is NOT sufficient to set up operating system

kernel parameters for Oracle Net (C): While the oracle-database-preinstall-19c package automates

the setting of several kernel parameters to meet the preinstallation requirements for Oracle

Database, it does not specifically tailor all settings for Oracle Net in a Data Guard configuration.

Additional manual configuration may be required to optimize Oracle Net services for Data Guard

operations.

Reference:

Oracle Data Guard Broker documentation

Oracle Net Services Administrator's Guide

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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).

Reference: 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.

D . The database role indicated by FS_FAILOVER_STATUS as BYSTANDER implies that the database is a

standby database in the Data Guard configuration. This means the database is neither a primary

database nor an active failover target.

E . Since the FS_FAILOVER_OBSERVER_HOST column shows cats, it suggests that this is the host on

which the observer would run. However, because the FS_FAILOVER_OBSERVER_PRESENT column is

not shown, we cannot definitively state if the observer is currently connected or not. If

FS_FAILOVER_OBSERVER_PRESENT is 'YES', the observer is connected, if 'NO', then it's not. In the

absence of this column's output, the best assumption based on the available data is that the

observer is not connected.

The output shows that the FS_FAILOVER_STATUS is BYSTANDER, which indicates that the database in

question is not actively involved in a fast-start failover configuration as a primary or standby. It is in a

bystander role, meaning that while it is part of a Data Guard configuration, it is neither a target for

failover nor actively participating in failover operations. Additionally, FS_FAILOVER_OBSERVER_HOST

shows 'cats', which indicates the host where the observer process is expected to run. However, since

there is no information about the observer being present, we can infer that although 'cats' is

designated for the observer to run, the observer is not currently connected to this database.

Reference

Oracle documentation on Data Guard configurations and the V$DATABASE view which provides

information about the fast-start failover status and observer host.

A logical standby database is part of Oracle Data Guard and allows the standby database to be open for read-write operations, providing additional flexibility. The requirements met by a logical standby database include: Support for workloads requiring additional materialized views (A): Logical standby databases can support materialized views, allowing for complex data summarization and reporting workloads. It can be used to create additional tables (C): Unlike physical standby databases, logical standby databases allow for the creation of additional tables that do not exist in the primary database, enabling custom workloads and reporting. It can be used for Real Application Testing without affecting the disaster recovery capabilities (E): Logical standby databases can be used to test application changes, patches, and upgrades while still maintaining their role as part of the disaster recovery strategy. Support for workloads requiring additional indexes (F): Logical standby databases allow for the creation of additional indexes to optimize query performance for reporting and analytical workloads. Reference: Oracle Data Guard Concepts and Administration Oracle Database High Availability Overview

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.

Reference:

Oracle Database Backup and Recovery User's Guide

Oracle Data Guard Concepts and Administration Guide

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

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.

When STANDBY_FILE_MANAGEMENT is set to AUTO, the Oracle Data Guard automatically creates,

deletes, and renames files on the standby database to match the changes made on the primary

database. The tasks that lead to the automatic creation of files on the standby include:

Adding a data file or creating a tablespace (C): When a new tablespace is created or a new data file is

added on the primary database, the standby database automatically replicates this action,

maintaining structural consistency with the primary database.

Creating a PDB from the existing PDB within the same CDB (D): Creating a new Pluggable Database

(PDB) within a Multitenant Container Database (CDB) on the primary database triggers an automatic

creation of the corresponding PDB within the standby CDB.

Reference:

Oracle Data Guard Concepts and Administration Guide

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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​​​​.

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The EDIT DATABASE...SET PARAMETER command in Data Guard Management (DGMGRL) is used to

modify the value of initialization parameters for a database within a Data Guard configuration. This

command can be used to modify both static and dynamic parameters, but if a static parameter is

changed, the new value will take effect only after the database is restarted. The database must be up

and running for the command to execute, and the values set using the command are directly applied

to the specified database (in this case, 'boston') .

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