1z0-915-1 Questions PDF [2025] Use Valid New dump to Clear Exam [Q27-Q44]

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1z0-915-1 Questions PDF [2025] Use Valid New dump to Clear Exam

Passing Oracle 1z0-915-1 Exam Using 2025 Practice Tests

Oracle 1z0-915-1 Exam Syllabus Topics:

Topic	Details
Topic 1	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 2	Inbound Replication: For database administrators and replication experts, this section of the exam covers setting up and troubleshoot inbound replication and creating channels.
Topic 3	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 4	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 5	HeatWave Cluster: For database performance specialists and cloud architects, this section of the exam covers

Q27. 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?

mysqlsh mysql://[email protected]:3311

mysqlsh mysql://[email protected]:3306

mysqlsh mysql://[email protected]:3311

mysqlsh mysql://[email protected]:3306

Q28. Which feature do you use to copy transactions from an on-premises MySQL instance to a DB system?

HeatWave cluster

Inbound replication

Read replica

Outbound replication

Q29. You have successfully enabled high availability of a stand-alone DB system. Which is true?

The DB system performs load balancing by distributing client connections to all instances.

The DB system provides new port numbers on the same endpoint to connect to the secondary instances for read-only connections.

The DB system provides new endpoints to connect to the secondary instances for read-only connections.

The DB system has three instances running in different availability or fault domains.

Q30. A MySQL DB system has an endpoint in an OCI VCN subnet. The VCN is not configured with VCN peering, VPN access, and FastConnect. You want to connect to the MySQL DB system directly from an OCI Cloud Shell session.
Which two are true? (Choose two.)

You must attach the Cloud Shell session to a VCN subnet that can connect to the MySQL DB system.

You must install mysql client programs in the Cloud Shell session.

The MySQL DB system subnet must be in the Cloud Shell tenancy home region.

The VCN subnet of the Cloud Shell session must have a Service Gateway in its route table.

The VCN subnet of the Cloud Shell session must have an Internet Gateway in its route table.

Q31. Which two are true about data loaded into a MySQL HeatWave cluster? (Choose two.)

Data is replicated across cluster nodes for high availability.

Data is partitioned across cluster nodes for scalability.

Data is stored locally in each cluster node’s solid state disks (SSD) to increase I/O performance.

Data is stored in hybrid columnar format to speed up analytic queries.

Data rows are sorted on the primary key to speed up range search.

Q32. Which two are true about MySQL HeatWave configuration resources? (Choose two.)

You can set a value for any global MySQL variable in a configuration.

You must copy the configuration before changing any variable values.

You can view custom configuration sets with the OCI CLI oci mysql db-system get command.

You can compare configurations in the same compartment in OCI console.

Q33. What is the benefit of creating a new DB system with data import?

Faster import with minimal logging

Smaller storage size with better compression

Faster backup with a first full backup

Consistent data with no user connection

Q34. 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.)

Generate a load command to activate Auto Parallel Load.

Estimate the number of OCPUs required to process selected user tables.

Estimate the memory required for each user table.

Generate a set of alter statements to load selected tables into the HeatWave cluster.

Estimate the disk storage required for each user table.

Q35. You want to import data into a DB system with MySQL Shell util.loadDump().
Which option can speed up the load?

updateGtidSet: off

showMetadata: false

skipBinlog: true

deferTableIndexes: all

Q36. 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?

Run MySQL Shell on an OCI compute instance to export and import the data for faster migration.

Store the exported data in object storage to speed up the export and import.

Use inbound replication to synchronize the MySQL database transactions to the DB system.

Use the largest DB system shape to speed up the import.

Q37. 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?

View the Query Execution Plan of the query by running EXPLAIN.

Check the value of the rapid_query_offload_count global status variable.

Query the rpd_tables table in performance_schema.

Check the value of the hw_data_scanned global status variable.

Q38. Which three operations can be performed on a MySQL HeatWave backup? (Choose three.)

Delete an active manual backup when point-in-time recovery is enabled on the DB system.

Change the retention period of an active manual backup.

Restore an active backup to a new DB system in another region.

Change the retention period of an active automatic backup.

Move an active backup to another compartment.

Q39. You want to create a custom configuration for the MySQL DB system in OCI Console. Which three can you set? (Choose three.)

Shape

VCN

Description

Subnet

Compartment

Q40. Which placement is NOT valid for a high-availability DB system? (Note: AD refers to availability domain and FD refers to fault domain.)

Primary instance: AD1-FD1; Secondary instance 1: AD2-FD2; Secondary instance 2: AD3-FD3

Primary instance: AD1-FD3; Secondary instance 1: AD2-FD2; Secondary instance 2: AD3-FD3

Primary instance: AD1-FD1; Secondary instance 1: AD1-FD2; Secondary instance 2: AD1-FD3

Primary instance: AD1-FD3; Secondary instance 1: AD1-FD2; Secondary instance 2: AD1-FD3

Q41. You create a MySQL DB system with default port numbers, and attach it to a subnet.
Which configuration is required on the subnet to enable client applications to connect to the DB system?

Create an ingress rule that allows stateless connections on port 3306 and 33060.

Create an egress rule that allows stateful connections on port 3306 and 33060.

Create an ingress rule that allows stateful connections on port 3306 and 33060.

Create an egress rule that allows stateless connections on port 3306 and 33060.

Q42. Which three are features of MySQL AutoPilot? (Choose three.)

Auto backup

Auto thread pooling

Auto encoding

Auto provisioning

AutoML

Q43. What must you do before deleting a DB system?

Take a manual backup

Stop the instance if it is running.

Disable delete protection if it is enabled.

Stop and remove any connected HeatWave Cluster.

Q44. Which sequence of steps must you perform to change the configuration of a high-availability DB system?

Disable high availability, edit the DB system, change the configuration, and enable high availability.

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

Edit and change the configuration of all secondary instances, switch over to a secondary instance, andedit and change the configuration of the former primary instance.

Edit the DB system and change the configuration.