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Oracle 1z0-915-1 Exam Syllabus Topics:

Topic	Details
Topic 1	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.
Topic 2	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.
Topic 3	HeatWave Cluster: For database performance specialists and cloud architects, this section of the exam covers
Topic 4	Inbound Replication: For database administrators and replication experts, this section of the exam covers setting up and troubleshoot inbound replication and creating channels.
Topic 5	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.
Topic 6	MySQL HeatWave Service: For database administrators, cloud architects, and DevOps engineers, this section of the exam covers identifying key features and benefits, describing MySQL HeatWave architecture, defining MySQL HeatWave terminology, and identifying MySQL HeatWave limitations.
Topic 7	Managing DB systems: For network administrators and cloud infrastructure specialists, this domain of the exam covers demonstrating a command of DRG and DRG Attachments, applying BGP in the OCI environment, evaluating OCI VPN Services, and validating the various FastConnect products from OCI.
Topic 8	Describe the architecture of the HeatWave cluster, adding a HeatWave cluster to a DB system, and determine whether a query is offloaded to HeatWave cluster for execution.
Topic 9	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.

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Oracle MySQL HeatWave Implementation Associate Rel 1 Sample Questions (Q12-Q17):

NEW QUESTION # 12
What happens when you perform a switchover of a high-availability DB system with an attached HeatWave cluster?

A. The HeatWave cluster remains attached to the same DB system and the new primary instance redirects queries to that cluster.
B. The HeatWave cluster is no longer valid; you must re-create the HeatWave cluster.
C. The HeatWave cluster is deleted and a new HeatWave cluster is attached to the new primary instance.
D. The HeatWave cluster is attached to the new primary instance.

Answer: D

Explanation:
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

NEW QUESTION # 13
You want to restore a stand-alone DB system to a high-availability DB system with a point-in-time recovery.
Which three are required? (Choose three.)

A. Point-in-time recovery must be enabled before the point in time to which you want to restore.
B. Every user table must have a primary key.
C. A manual backup taken before the selected point in time must be available.
D. An automatic backup taken before the selected point in time must be available.
E. The stand-alone DB system must remain active during the restore.

Answer: A,C,D

Explanation:
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.

NEW QUESTION # 14
Which three are features of MySQL AutoPilot? (Choose three.)

A. Auto backup
B. AutoML
C. Auto encoding
D. Auto thread pooling
E. Auto provisioning

Answer: B,C,E

Explanation:
The following are features of MySQL AutoPilot:
* Auto encoding(Answer C): MySQL AutoPilot automatically determines the best encoding for data to optimize storage and performance.
* Auto provisioning(Answer D): MySQL AutoPilot can automatically provision additional resources based on workload demands, ensuring optimal performance.
* AutoML(Answer E): MySQL AutoPilot includes AutoML capabilities, which automate the process of machine learning model selection, training, and deployment.
References:
* MySQL HeatWave AutoPilot Documentation
* MySQL AutoPilot Features

NEW QUESTION # 15
You want to migrate an on-premises MySQL database to a MySQL DB system on OCI.
Which method provides the least amount of application down time when switching to the DB system?

A. Use the largest DB system shape to speed up the import.
B. Run MySQL Shell on an OCI compute instance to export and import the data for faster migration.
C. Store the exported data in object storage to speed up the export and import.
D. Use inbound replication to synchronize the MySQL database transactions to the DB system.

Answer: D

Explanation:
To migrate an on-premises MySQL database to a MySQL DB system on OCI with the least amount of application downtime,use inbound replication to synchronize the MySQL database transactions to the DB system(Answer C).
* Inbound Replication: This method involves setting up replication from your on-premises MySQL database to the MySQL DB system in OCI. This ensures that all changes and transactions are continuously replicated, keeping the DB system up to date with minimal downtime.
* Steps to Implement:
* Set up the MySQL DB system in OCI.
* Configure the on-premises MySQL database as the master and the OCI DB system as the slave.
* Start the replication process to keep the DB system synchronized with the on-premises database.
* When ready, switch the application to the DB system with minimal downtime as the data is already synchronized.
References:
* MySQL Replication Documentation
* OCI MySQL Database Service Replication

NEW QUESTION # 16
There are more than 10 concurrent users running queries on the DB system. The airport_geo table has been loaded successfully into a HeatWave cluster.
You want to run this query:
SELECT DISTINCT country FROM airport_geo ORDER BY country;
How do you determine whether the query is offloaded to the HeatWave cluster for execution?

A. View the Query Execution Plan of the query by running EXPLAIN.
B. Query the rpd_tables table in performance_schema.
C. Check the value of the hw_data_scanned global status variable.
D. Check the value of the rapid_query_offload_count global status variable.

Answer: D

Explanation:
To determine whether a query is offloaded to the HeatWave cluster for execution,check the value of the rapid_query_offload_countglobal status variable(Answer B).
* rapid_query_offload_count: This variable indicates the number of queries that have been offloaded to the HeatWave cluster. By checking its value before and after running the query, you can determine if the query was offloaded.
Steps:
* Connect to the MySQL DB system.
* RunSHOW GLOBAL STATUS LIKE 'rapid_query_offload_count';before and after executing the query to see if the count increases, indicating offloading.
References:
* MySQL HeatWave Documentation
* Monitoring HeatWave Status Variables

NEW QUESTION # 17
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