Pass the Oracle MySQL Database Administration 1z0-915-1 Questions and answers with ExamsMirror

To restore a stand-alone DB system to a high-availability DB system with point-in-time recovery, the following are required:

B.Point-in-time recovery must be enabled before the point in time to which you want to restore: Point-in-time recovery (PITR) must be enabled beforehand to allow restoration to a specific point in time. C.An automatic backup taken before the selected point in time must be available: You need an automatic backup from before the desired restore point. D.A manual backup taken before the selected point in time must be available: Manual backups are also essential to ensure you can restore to the desired point in time.

For a MySQL DB system with five active read replicas and a workload consisting mostly of reads, the fastest query response time is achieved by:

C.Connect to the read replica load balancer to perform read-only operations: The read replica load balancer distributes the read workload across all replicas, optimizing performance and response time.

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

To copy transactions from an on-premises MySQL instance to a DB system, you useinbound replication(Answer B).

Inbound Replication: This feature allows the MySQL DB system to receive and apply changes (transactions) from an external MySQL instance.

Replication Configuration: You need to set up replication between the on-premises MySQL instance and the MySQL DB system by configuring the master (on-premises) and the slave (DB system) appropriately.

References:

MySQL Replication Documentation

OCI MySQL Database Service Documentation

When exporting data to Object Storage withMySQL Shell util.dumpInstance,you must specifyociParManifest: true(Answer B). This option creates a pre-authenticated request (PAR) manifest file, which allows for secure access and upload to Object Storage without requiring direct credentials.

References:

MySQL Shell Documentation

OCI Object Storage Documentation

A.Reduce query latency: By distributing read queries across multiple replicas, the load on the primary instance is reduced, which can decrease query latency. D.Scale read queries: Read replicas allow scaling of read operations by providing additional instances to handle read queries, improving overall performance and throughput.

You can stop a MySQL DB system using the following methods:

A.Use the STOP action on the DB system details page in the OCI Console: This is a straightforward way to stop the DB system via the Oracle Cloud Infrastructure web interface. D.Execute themysql db-system stopcommand from OCI CLI: This command uses the Oracle Cloud Infrastructure Command Line Interface to stop the DB system programmatically.

The purpose of theocimds: trueoption in theutil.dumpInstancecommand is to:

D.It stores the exported files in OCI Object Storage: This option ensures that the exported database files are stored directly in Oracle Cloud Infrastructure Object Storage.

Given the SSH command sets up port forwarding from the local port3311to the remote MySQL DB system port3306, the correct command to connect to the MySQL DB system from the client machine is:

C.mysqlsh mysql://admin@127.0.0.1:3311

This command connects to the local machine's port3311, which forwards the connection to the MySQL DB system at10.10.1.187:3306.