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질문 # 55
What happens when you perform a switchover of a high-availability DB system with an attached HeatWave cluster?
정답：C
설명：
When you perform a switchover of a high-availability DB system with an attached HeatWave cluster, theHeatWave cluster is attached to the new primary instance(Answer B). This ensures continuous operation and access to the HeatWave cluster's capabilities without the need to delete or re-create the cluster.
* During a switchover, the system promotes the standby instance to the primary role.
* The HeatWave cluster, which was previously attached to the original primary instance, is now re-attached to the new primary instance.
* This allows the new primary instance to continue processing queries using the HeatWave cluster seamlessly.
References:
* MySQL HeatWave High Availability Documentation
질문 # 56
Which two are true about creating a new DB system with data import? (Choose two.)
정답：C,D
설명：
When creating a new DB system with data import, the following conditions apply:
* The data must be stored in an Object Storage bucket in the same OCI region as the new DB system(Answer C): This ensures that the data is readily accessible and can be efficiently imported into the new DB system.
* A valid pre-authenticated request must be provided to access the data(Answer D): This allows secure access to the data stored in the Object Storage bucket without needing to handle credentials directly.
References:
* OCI Object Storage Documentation
* Pre-Authenticated Requests Documentation
질문 # 57
Which two are true about data loaded into a MySQL HeatWave cluster? (Choose two.)
정답：A,D
설명：
Data loaded into a MySQL HeatWave cluster:
B:Data is partitioned across cluster nodes for scalability: This allows the system to distribute the workload and handle large datasets efficiently. D.Data is stored in hybrid columnarformat to speed up analytic queries: The hybrid columnar format optimizes storage and speeds up query performance, especially for analytic workloads.
질문 # 58
You want to import data into a DB system with MySQL Shell util.loadDump().
Which option can speed up the load?
정답：D
설명：
To speed up the data load into a DB system usingMySQL Shell util.loadDump(), you can use the deferTableIndexes: alloption (Answer D). This option defers the creation of indexes until after the data has been loaded, which can significantly improve the speed of the loading process.
Steps:
* Export your data using MySQL Shell dump utility.
* Useutil.loadDump()to import the data and specify thedeferTableIndexes: alloption.
* The data is loaded without building indexes initially, reducing the time required for the import.
* After the data load is complete, indexes are created in a batch process, which is more efficient than creating them during the data load.
References:
* MySQL Shell Dump & Load Documentation
질문 # 59
A port-forwarding Bastion session has been created for a MySQL DB system listening on 10.10.1.187:3306.
The SSH command provided by the Bastion session is:
An SSH tunnel is created successfully on a client machine by running this command:
Which command connects to the MySQL DB System from the client machine?
정답：C
설명：
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.
질문 # 60
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