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1Z0-915-1 Exam Questions

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Oracle 1Z0-915-1 Exam Details

Key details for this exam, checked against the published exam outline

Exam Code: 1Z0-915-1
Full Name: MySQL HeatWave Implementation Associate Rel 1
Issuing Body: Oracle
Question Format (Our Bank): Multiple Choice
Full Question Set: 65 questions Get All Questions

Practice Questions

Free 1Z0-915-1 Practice Questions

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Question 1 Domain 4 Backing up and restoring DB systems

You want to create a custom configuration for the MySQL DB system in OCI Console. Which three can you set? (Choose three.)

AShape

BVCN

CDescription

DSubnet

ECompartment

Correct Answer A, C, E

Explanation Backup operations in MySQL HeatWave let you manage retention periods on manual backups, restore backups to new systems in different regions for disaster recovery, and move backups between compartments for organizational control. You cannot delete active backups, download them directly, or change their encryption after creation. These three operations support business continuity and compliance requirements.

Question 2 Domain 9 HeatWave Cluster

Which two are true about read replica load balancer? (Choose two.)

AIt has the same endpoint as the DB system.

BIt distributes connections among the source DB system and all read replicas.

CUser accounts containing a client host name cannot connect to the read replica load balancer.

DIt is created when the DB system is first created.

EIt distributes connections among read replicas.

Correct Answer B, E

Explanation HeatWave clusters distribute data across nodes using partitioning to enable parallel processing and scalability. The data uses hybrid columnar format which compresses columnar data and accelerates analytical query execution compared to row storage. Data is not duplicated across nodes and is not automatically compressed beyond the columnar format itself.

Question 3 Domain 6 Read Replicas

Which table option defines a Lakehouse external table based on a CSV file?

AENGINE=csv SECONDARY_ENGINE=rapid ENGINE_ATTRIBUTE='{''file'': [{''region'': ''us-ashburn-1'', ''namespace'': ''mytenant'', ''bucket'': ''bucket01'', ''name'': ''airport.csv''}] }'

BENGINE=csv SECONDARY_ENGINE=lakehouse ENGINE_ATTRIBUTE='{''file'': [{''region'': ''us-ashburn-1'', ''namespace'': ''mytenant'', ''bucket'': ''bucket01'', ''name'': ''airport.csv''}] }'

CENGINE=lakehouse SECONDARY_ENGINE=csv ENGINE_ATTRIBUTE='{''file'': [{''region'': ''us-ashburn-1'', ''namespace'': ''mytenant'', ''bucket'': ''bucket01'', ''name'': ''airport.csv''}] }'

DENGINE=lakehouse SECONDARY_ENGINE=rapid ENGINE_ATTRIBUTE='{''file'': [{''region'': ''us-ashburn-1'', ''namespace'': ''mytenant'', ''bucket'': ''bucket01'', ''name'': ''airport.csv''}] }'

Correct Answer C

Explanation The read replica load balancer distributes read-only queries across all five replicas, providing faster response times than connecting to a single replica or the primary system. With 95% reads, spreading the load across multiple nodes reduces latency and contention. Connecting to the primary would handle writes but adds unnecessary overhead for read-only operations.

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Question 4 Domain 7 Data Migrations

A DB system has been deleted successfully. Which two operations are allowed on the deleted DB system? (Choose two.)

AChange the storage size.

BCreate a manual backup.

CRestore the DB system from an existing manual backup.

DView the metrics.

EView the API call logs on the Audit page.

Correct Answer C, E

Explanation MySQL Shell provides two primary methods for importing data. The util.importTable() function imports individual tables, while util.loadDump() loads complete database dumps created by MySQL Shell's dump utilities. The other options like import export utilities or SQL queries are either less efficient or not available as named MySQL Shell methods for data import.

Question 5 Domain 7 Data Migrations

You want to change the configuration of an active stand-alone DB system. The DB system is configured as the target of a channel, and the channel is currently active.

Which sequence of steps must you perform?

AEdit the DB system and change the configuration.

BStop the DB system, edit the DB system, change the configuration, and start the DB system.

CDelete the channel, edit the DB system, change the configuration, and re-create the channel.

DStop the channel, edit the DB system, change the configuration, and start the channel.

Correct Answer D

Explanation Creating a replication channel requires the channel name to identify it, the target DB system where changes will be applied, and the source connection password to authenticate with the source database. You do not need the source DB system name separately since the connection details handle this. The channel type is selected but not provided by the user.

Question 6 Domain 5 MySQL HeatWave Configurations

You want to train a model that predicts sales based on the available data the company holds.

This is an excerpt of the sales table:

Question 6 exhibit

Which command trains the model?

ACALL sys.ML_TRAIN('ml_data.sales', 'Sales', JSON_OBJECT('task', 'anomaly_detection'), @model);

BCALL sys.mML_TRAIN('ml_data.sales', 'Sales', JSON_OBJECT('task', 'forecasting'), @model);

CCALL sys.ML_TRAIN('ml_data.sales', 'Sales', JSON_OBJECT('task', 'classification'), @model);

DCALL sys.ML_TRAIN('ml_data.sales', 'Sales', JSON_OBJECT('task', 'regression'), @model);

Correct Answer D

Explanation Initialization variables are set when MySQL starts and cannot be changed in custom configurations. Dynamic variables can be modified in custom configurations to optimize performance for different workloads. This distinction is important because initialization variables require a restart to change, while dynamic variables take effect immediately.

Question 7 Domain 4 Backing up and restoring DB systems

You want to deploy a high-availability MySQL DB system in a region with multiple availability domains.

Which two types of subnet provide maximum redundancy? (Choose two.)

AA public AD-specific subnet

BA private regional subnet

CA public regional subnet

DA private AD-specific subnet

Correct Answer B, C

Explanation When restoring a backup to a new DB system, you can change the subnet to place the system in a different network location and use a different shape to adjust compute and memory resources. You cannot change the region or availability domain during restore from backup. The database name and backup source must remain consistent.

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Study Guide

What the Oracle 1Z0-915-1 Exam Covers

Exam domains verified against the Official Oracle 1Z0-915-1 exam guide, last checked November 2026.

Domain 1 MySQL HeatWave Service

Learn to identify key features and benefits of MySQL HeatWave, describe its architecture, define terminology, and recognize limitations. This foundational knowledge applies to database administrators, cloud architects, and DevOps engineers managing HeatWave deployments.

Domain 2 Provisioning and Connecting DB systems

Master the identification of VCN requirements for provisioning DB systems and the various connection methods including OCI Bastion, MySQL Shell, OCI Cloud Shell, and OCI SQL Worksheet. Understand how to authenticate DB systems with OCI Identity Access Management credentials.

Domain 3 Managing DB systems

Develop command of DRG and DRG Attachments, apply BGP in the OCI environment, evaluate OCI VPN Services, and validate FastConnect products. These network and infrastructure skills are essential for cloud infrastructure specialists and network administrators.

Domain 4 Backing up and restoring DB systems

Learn to back up and restore DB systems, manage automatic backups, and perform point-in-time recovery. Disaster recovery specialists need these practical skills to ensure data protection and business continuity.

Sample questions from this domain above Q1 Q7

Domain 5 MySQL HeatWave Configurations

Create custom configurations and compare them to understand the effects of changing dynamic and non-dynamic variables. Update DB system configurations to optimize performance for different workload requirements.

Sample question from this domain above Q6

Domain 6 Read Replicas

Create and manage read replicas, understand the read replica load balancer, and connect to read replicas effectively. Database architects and replication specialists need these skills for scaling read-heavy workloads.

Sample question from this domain above Q3

Domain 7 Data Migrations

Create DB systems with data import, import data into DB systems, and export data from MySQL servers and DB systems. Data migration specialists execute these practical tasks to move workloads into the HeatWave platform.

Sample questions from this domain above Q4 Q5

Domain 8 High Availability

Enable and disable high availability in DB systems, explain placement considerations, and distinguish between switchover and failover operations. System reliability engineers architect resilient deployments that maintain service continuity.

Domain 9 HeatWave Cluster

Describe HeatWave cluster architecture, add HeatWave clusters to DB systems, and determine whether queries are offloaded to the cluster for execution. Database performance specialists optimize in-memory analytics workloads using cluster capabilities.

Sample question from this domain above Q2

Domain 10 HeatWave Cluster

FAQ

1Z0-915-1 Exam FAQ

Common questions about the exam itself

What background do I need to sit the 1Z0-915-1 MySQL HeatWave exam?

Oracle does not publish formal prerequisites for this exam. However, you should have practical experience with MySQL database administration, familiarity with Oracle Cloud Infrastructure (OCI) concepts, and understanding of database architecture and networking. Most candidates benefit from hands-on experience provisioning and managing database systems in the cloud.

How long does preparation for 1Z0-915-1 typically take?

Preparation time varies based on your existing knowledge. If you already work with MySQL and OCI regularly, six to eight weeks of focused study is reasonable. For those new to HeatWave or OCI, three to four months allows time to gain hands-on experience with the platform while studying the exam topics.

Which objective area in 1Z0-915-1 is considered most difficult?

Most candidates find the HeatWave Cluster section challenging because it requires understanding both the technical architecture and practical query optimization decisions. The MySQL HeatWave Configurations domain is also demanding because it involves understanding how dynamic variables affect performance in real deployments.

What is the format and structure of the 1Z0-915-1 exam?

The exam uses multiple choice questions presented in a mixed format including single-answer and scenario-based questions. You will encounter both knowledge-based questions about concepts and terminology, and practical scenario-driven questions that test decision-making in real-world HeatWave implementations.

How is the 1Z0-915-1 exam delivered and what should I expect on exam day?

You can sit the exam online proctored or at a Pearson VUE test centre. On exam day, bring a government-issued ID and arrive early to allow time for check-in. The proctor will verify your identity and review the testing agreement before the exam begins. You will work through the questions in a secure browser with no access to external resources.

What is the passing score for 1Z0-915-1 and how is it calculated?

Oracle publishes the passing score as a percentage or points out of a total. The exact score needed depends on the question weighting. You will receive your result immediately after finishing, and the testing centre will provide a detailed score report showing your performance in each objective domain.

Can I retake the 1Z0-915-1 exam if I do not pass?

Yes, you can retake the exam. Oracle typically enforces a waiting period between attempts, usually 14 days. Each retake requires a new exam fee. Many candidates use the feedback from their first attempt to identify weak areas and focus their study on those domains.

How long does the 1Z0-915-1 certification stay valid?

Oracle certifications are typically valid for three years from the date you pass the exam. After that period, you may need to recertify by passing an updated exam or completing continuing education requirements. Check Oracle's certification maintenance policy for the specific requirements.

What job roles is the 1Z0-915-1 certification designed for?

This certification targets database administrators managing HeatWave deployments, cloud architects designing analytics solutions, DevOps engineers building infrastructure, and data engineers optimizing query performance. It is valuable for anyone building, deploying, or managing MySQL HeatWave systems in production environments.

How does 1Z0-915-1 relate to other MySQL or Oracle Database certifications?

The 1Z0-915-1 focuses specifically on MySQL HeatWave implementation on OCI. It complements broader database certifications like the Oracle Database SQL Certified Associate (1Z0-071). Candidates often pursue this exam after gaining foundational SQL knowledge, then move toward OCI infrastructure certifications to deepen their cloud skills.

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