1z0-076最新試題，1z0-076考試內容

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Oracle 1z0-076 考試大綱：

主題	簡介
主題 1	Using Flashback Database in a Data Guard Configuration: This topic covers the configuration and advantages of using Flashback Database in a Data Guard setup, as well as the process of enabling fast-start failover for seamless role changes.
主題 2	Patching and Upgrading Databases in a Data Guard Configuration: This section provides guidance on patching and upgrading databases in a Data Guard environment, along with performance optimization techniques and monitoring considerations.
主題 3	Oracle Data Guard Broker Basics: An overview of the Data Guard broker, its architecture, components, benefits, and configurations, is provided here. It serves as an introduction to the tool used for managing Data Guard configurations.
主題 5	Managing Physical Standby Files After Structural Changes on the Primary Database: The topic covers managing structural changes in the primary database and their impact on physical standby files.
主題 6	Backup and Recovery Considerations in an Oracle Data Guard Configuration: In this topic, Backup and recovery procedures in a Data Guard configuration are discussed, including RMAN backups, offloading to physical standby, and network-based recovery.
主題 7	Using Oracle Active Data Guard: Supported Workloads in Read-Only Standby Databases: Here, the usage of physical standby databases for real-time queries is discussed.
主題 8	Performing Role Transitions: Here, the concept of database roles is explained, along with the steps for performing switchovers, failovers, and maintaining physical standby sessions during role transitions.
主題 9	Creating a Data Guard Broker Configuration: This section delves into the practical aspects of creating and managing a Data Guard broker configuration, including command-line and Enterprise Manager approaches.

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1z0-076考試內容 & 1z0-076考試指南

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最新的 Oracle Database 19c 1z0-076 免費考試真題 (Q62-Q67):

問題 #62
Your expertise is requested for these customer requirements:
The Data Guard environment must be in maximum protection mode.
Reports must be offloaded to a physical standby database.
There must be no lag between the primary and standby databases that affect the reports produced.
The primary database must be resilient in case of a single network failure.
Which solution is correct for these requirements?

A. Two physical standby databases with Real-Time Query enabled, receiving redo from the primary with the LOG_ARCHIVE_DEST_n attributes SYNC NOAFFIRM to minimize the performance impact on the primary
B. One physical standby database with Real-Time Query enabled, receiving redo from two Far Sync instances that are connected to the primary
C. Two standby databases, at least one of them a physical standby with Real-Time Query enabled and the STANDBY_MAX_DATA_DELAY parameter set to zero, receiving redo from the primary with synchronous transport
D. One physical standby database with Real-Time Query enabled and STANDBY_MAX_DATA_DELAY parameter set to zero, receiving redo from the primary with synchronous transport
E. Two standby databases, at least one of them a physical standby with Real-Time Query enabled and the STANDBY_MAX_DATA_DELAY parameter set to zero, receiving redo from the primary with asynchronous transport

答案：C

問題 #63
Which THREE statements are TRUE about Global Sequences when connected to a physical standby database with Real-Time Query enabled?

A. Their usage will always have a performance impact on the primary database.
B. They must have the NOORDEK and CACHE options set.
C. If the CACHE option is set then the size of the cache must be at least 100.
D. Their usage may have a performance impact on the physical standby database if the CACHE size is too small.
E. Their creation requires that a LOG archive_dest_n parameter be defined in the standby that points back to the primary.

答案：A,B,D

解題說明：
Global Sequences are Oracle sequences that generate unique values across multiple instances in an Oracle RAC or a Data Guard configuration. Regarding their behavior and performance when connected to a physical standby database with Real-Time Query enabled:
* A: The usage of Global Sequences can indeed have a performance impact on the primary database due to the need to generate unique values that are consistent across both primary and standby databases.
* D: The performance impact on the physical standby database may occur if the CACHE size is too small. This is because the standby database will frequently have to access the primary database to replenish the cache, which can increase the load and potentially lead to performance degradation.
* E: Global Sequences should have the NOORDER and CACHE options set. The NOORDER option ensures that sequence numbers are provided without guaranteeing sequence order, thus improving scalability and performance. The CACHE option is used to specify how many sequence values will be held in memory for faster access.
Option B is incorrect as the LOG_ARCHIVE_DEST_n parameter's definition for standbys pointing back to the primary does not directly pertain to the creation of sequences.
Option C is incorrect because there is no requirement that the size of the cache for a sequence must be at least
100. The CACHE size can be set to a different number based on specific use cases or performance considerations.
References: Oracle's documentation on sequences and their behavior in a Data Guard environment provides insights into the performance considerations and best practices for using sequences, particularly in a Real-Time Query context.

問題 #64
Which TWO statements are true regarding Data Guard Broker?

A. It automatically starts the DMON process for the database instances that are part of a Data Guard configuration.
B. It can be used to monitor redo transport and log apply services.
C. It can be used to perform failovers and switchovers.
D. It automatically adds the primary database to an existing broker configuration when Enterprise Manager Cloud Control is used to create a standby.
E. It can be used to create and manage standby databases.

答案：C,E

問題 #65
Which THREE statements are true about Far Sync instances?

A. They use an spfMe, a standby controlfile, and standby redo logs.
B. They enable standby databases to be configured at remote distances from the primary without impacting performance on the primary.
C. A primary database can ship redo directly to multiple Far Sync instances.
D. They work with any protection level.
E. The Data Guard Broker must be used to deploy and manage Far Sync instances.

答案：B,C,E

問題 #66
Which THREE steps are prerequisites for the creation of a physical standby database on a separate server using the RMAN active database duplication method?

A. Set the DB_UNIQUE_NAME parameter on the primary database to a different value than that of the DB_NAME name parameter.
B. Put the primary database into archivelog mode.
C. startup nomount the standby database instance.
D. Configure Oracle Net connectivity on the primary host to the standby database instance.
E. Establish user equivalence for the database software owner between the primary host and standby host.

答案：C,D,E

解題說明：
Creating a physical standby database using RMAN active database duplication requires certain prerequisites to ensure a successful and seamless operation:
Configure Oracle Net connectivity on the primary host to the standby database instance (A): Proper Oracle Net connectivity between the primary and standby servers is essential for communication and data transfer during the duplication process. Oracle Net services provide the network foundation for Oracle Database, Oracle Net Listener, and Oracle applications.
Establish user equivalence for the database software owner between the primary host and standby host (B): User equivalence ensures that the user who owns the Oracle Database software on the primary server has the same privileges on the standby server. This is crucial for RMAN to perform operations on both servers without encountering permission issues.
Startup nomount the standby database instance (C): The standby database instance needs to be started in the NOMOUNT stage before the duplication can begin. This prepares the environment for creating the control file and restoring the database without mounting it, which is a necessary step in the RMAN duplication process.
Reference:
Oracle Database Backup and Recovery User's Guide
Oracle Data Guard Concepts and Administration

問題 #67
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