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1Z0-915-1 MySQL HeatWave Implementation Practice Questions

Prepare for 1Z0-915-1 with more than an answer.

239 questions in the full set17 sample questionsUpdated Jan 25, 2026
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Exam fee
$245 USD
Level
Associate
Valid for
Does not expire
Domains covered on the exam 11
  1. MySQL HeatWave Service
  2. Provisioning and Connecting DB Systems
  3. Managing DB Systems
  4. Backing Up and Restoring DB Systems
  5. MySQL HeatWave Configurations
  6. Read Replicas
  7. Inbound Replication
  8. Data Migrations
  9. High Availability
  10. HeatWave Cluster
  11. HeatWave AutoML
  1. 1

    You are configuring a connection to a MySQL DB System using OCI Cloud Shell. You have selected the correct VCN and private subnet in the Cloud Shell network configuration. However, the connection to the MySQL endpoint fails with a timeout. Which VCN component configuration should you verify first?

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    Correct answer: A

    Even if Cloud Shell is attached to the subnet, the Security List (or NSG) rules still apply. Cloud Shell uses a specific CIDR block range when attached to a private network. The subnet's security rules must explicitly allow ingress traffic from this range on the MySQL ports (3306 for Classic, 33060 for X Protocol).

  2. 2

    A healthcare organization requires strict adherence to a 7-year data retention policy for audit logs stored in their MySQL DB System. They currently use the default automatic backup policy. What modification is necessary to meet this compliance requirement within the MySQL Database Service limitations?

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    Correct answer: B

    Automatic backups in MySQL Database Service typically have a maximum retention period (e.g., 35 days). To retain data for 7 years, you must export or copy backups to OCI Object Storage and apply a Retention Rule (WORM compliance) to the bucket to ensure the data cannot be deleted or modified for the required duration.

  3. 3

    You are managing a MySQL DB System with a custom configuration. You need to increase the innodb_buffer_pool_size to improve performance. The system is a standalone instance. What will happen when you apply this configuration update?

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    Correct answer: B

    While innodb_buffer_pool_size is dynamic in standard MySQL 8.0, in the managed OCI MySQL Database Service, changing this variable via a configuration update typically triggers a restart of the DB System instance to ensure resource allocation is handled correctly by the underlying infrastructure.

  4. 4

    A read-heavy application is experiencing connection timeouts. You have deployed three Read Replicas and a Load Balancer. You need to configure the application to utilize these resources efficiently. Which endpoint should the application use for read-only traffic?

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    Correct answer: B

    When a Load Balancer is configured for Read Replicas, it provides a single IP address endpoint. Applications should connect to this endpoint to have their read traffic automatically distributed across the available healthy read replicas, ensuring load balancing and high availability for reads.

  5. 5

    You are setting up an Inbound Replication channel from an external MySQL source to OCI. The source server does not have GTIDs enabled (gtid_mode=OFF). Which replication positioning strategy must you select during the channel configuration?

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    Correct answer: B

    If the source server has gtid_mode=OFF, you cannot use GTID Auto-Positioning. You must manually specify the Binary Log File name and the Position (offset) from which replication should start. This requires obtaining these coordinates from the source server using SHOW MASTER STATUS.

  6. 6

    Which of the following statements accurately describes the difference between dynamic and non-dynamic variables in a MySQL HeatWave configuration?

    graph TD A[Configuration Change] --> B{Restart Required?} B -->|Yes| C[Non-Dynamic Variable] B -->|No| D[Dynamic Variable] C --> E[Change applied after DB System restart] D --> F[Change applied immediately]

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    Correct answer: D

    In MySQL, system variables are categorized as either dynamic or non-dynamic. A change to a dynamic variable takes effect immediately while the server is running. A change to a non-dynamic variable, which often affects fundamental aspects like storage engine configuration or buffer sizes, requires the MySQL server instance (the DB System) to be restarted before the new value is applied.

  7. 7

    You can perform a node estimate when adding a HeatWave cluster to a DB system in OCI Console. Which two tasks are performed by the node estimate process? (Choose two.) A.Generate a load command to activate Auto Parallel Load.B.Estimate the number of OCPUs required to process selected user tables.C.Estimate the memory required for each user table.D.Generate a set of ALTER statements to load selected tables into the HeatWave cluster.E.Estimate the disk storage required for each user table.

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    Correct answer: B, C

  8. 8

    What must you do before deleting a DB system? A.Take a manual backup.B.Stop the instance if it is running.C.Disable delete protection if it is enabled.D.Stop and remove any connected HeatWave Cluster.

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    Correct answer: C

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