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Oracle 1z0-915-1 認定試験の出題範囲：

トピック	出題範囲
トピック 1	Data Migrations: For data migration specialists and database administrators, this part of the exam covers creating a DB system with data import, importing data into a DB system, and exporting data from MySQL servers and DB systems.
トピック 2	High Availability: For system reliability engineers and database architects, this domain of the exam covers how to enable and disable the high availability of a DB system, explain placement considerations for a high availability DB system, distinguish between switchover and failover, etc.
トピック 3	Read Replicas: For database architects and replication specialists, this domain of the exam covers creating and managing read replicas, describing the read replica load balancer, connecting to a read replica, etc.
トピック 4	Provisioning and Connecting DB systems: For system administrators and database engineers, this part of the exam covers identifying VCN requirements for provisioning DB systems, connecting to DB systems with OCI Bastion, connecting to DB systems with MySQL Shell, connecting to DB systems with OCI Cloud Shell, connect to DB system with OCI SQL Worksheet, and authenticate DB system with OCI Identify Access Management credentials.
トピック 5	Inbound Replication: For database administrators and replication experts, this section of the exam covers setting up and troubleshoot inbound replication and creating channels.
トピック 6	MySQL HeatWave Configurations: For database administrators and performance tuning specialists, this part of the exam covers creating custom configurations, comparing configurations, describing the effects of changing dynamic and non-dynamic variables, and updating a DB system configuration.

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Oracle MySQL HeatWave Implementation Associate Rel 1 認定 1z0-915-1 試験問題 (Q15-Q20):

質問 # 15
What must be enabled for using the point-in-time recovery feature in a DB system?

A. High availability
B. Delete protection
C. HeatWave cluster
D. Automatic backups

正解：D

解説：
To use the point-in-time recovery feature in a DB system,automatic backupsmust be enabled (Answer B).
* Point-in-Time Recovery: This feature allows you to restore your database to a specific point in time, which is crucial for recovering from accidental data loss or corruption.
* Automatic Backups: These provide the necessary backup data that can be used to restore the database to the desired point in time.
References:
* OCI MySQL Database Service Point-in-Time Recovery
* Automatic Backups Documentation

質問 # 16
What is the benefit of creating a new DB system with data import?

A. Faster import with minimal logging
B. Faster backup with a first full backup
C. Smaller storage size with better compression
D. Consistent data with no user connection

正解：A

解説：
Creating a new DB system with data import provides the benefit of faster import with minimal logging. This process is optimized to import large datasets efficiently and quickly, reducing the amount of logging overhead and ensuring a rapid setup of the new DB system.

質問 # 17
Automatic backup retention of a DB system is disabled. Which operation deletes all automatic backups of the DB system?

A. Disabling point-in-time recovery
B. Enabling point-in-time recovery
C. Deleting the DB system
D. Disabling delete protection

正解：C

解説：
When automatic backup retention of a DB system is disabled,deleting the DB system(Answer C) will delete all automatic backups of the DB system.
* Automatic Backups: These are backups created automatically by the OCI service to ensure data protection.
* Backup Deletion: If automatic backups are disabled and you delete the DB system, all associated automatic backups are also deleted. This operation is irreversible, and you should ensure that necessary backups are taken before deleting the DB system.
References:
* OCI MySQL Database Service Backup and Restore

質問 # 18
You have successfully provisioned a MySQL DB system on Oracle Cloud Infrastructure by using OCI Console. You have installed the standard MySQL client libraries and MySQL Shell on your workstation that is not connected to any VPN, FastConnect, or SSH tunnel.
You CANNOT connect directly to the DB system endpoint from your workstation connected to the Internet.
What is the reason?

A. MySQL DB system allows only connections through a proxy server.
B. MySQL DB system endpoint does not have a public IP address.
C. MySQL DB system cannot use the standard MySQL client libraries.
D. MySQL DB system allows only SSL-encrypted connections.

正解：B

解説：
If you cannot connect directly to the MySQL DB system endpoint from your workstation connected to the Internet, the reason is thatMySQL DB system endpoint does not have a public IP address(Answer B).
* Private Subnet: The MySQL DB system is provisioned in a private subnet, which means it is not directly accessible from the Internet.
* Network Accessibility: To access the DB system, you need to establish a secure connection via a VPN, FastConnect, or SSH tunnel.
References:
* Connecting to a MySQL DB System
* OCI Networking Documentation

質問 # 19
You want to enable high availability of a stand-alone DB system. Which two conditions are required? (Choose two.)

A. The DB system point-in-time recovery must be enabled.
B. The DB system automatic backup must be enabled.
C. The DB system delete protection must be enabled.
D. The DB system crash recovery must be enabled.
E. The DB system must be active.

正解：B、E

解説：
To enable high availability for a stand-alone DB system, the following conditions are required:
* The DB system must be active(Answer D): The DB system needs to be in an active state to enable high availability features.
* The DB system automatic backup must be enabled(Answer E): Automatic backups must be enabled to ensure data protection and facilitate failover operations.
Steps:
* Ensure the DB system is running and operational.
* Enable automatic backups through the OCI Console or API.
References:
* MySQL High Availability Documentation
* Automatic Backups Documentation

質問 # 20
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1z0-915-1学習指導、1z0-915-1難易度受験料

Oracle 1z0-915-1 認定試験の出題範囲：

1z0-915-1難易度受験料 & 1z0-915-1ソフトウエア

Oracle MySQL HeatWave Implementation Associate Rel 1 認定 1z0-915-1 試験問題 (Q15-Q20):

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