Online 1Z0-915-1 Practice Test

Question 1

How does the MySQL HeatWave architecture handle data distribution and access across multiple HeatWave Compute Nodes?

Options :

A : Broadcast: All nodes receive and process every query, leading to redundant work and potentially decreased performance.

B : Master-slave: One node acts as the master and receives all queries, while other nodes act as slaves and only execute the tasks assigned by the master.

C : Hash partitioning: Data is distributed and stored on specific nodes based on a hashing algorithm, ensuring efficient data access and parallel query execution.

D : Round-robin: Queries are sent to nodes in a circular fashion, potentially leading to uneven workloads and performance bottlenecks

Answer: C

Question 2

You have provisioned a MySQL HeatWave DB system in your VCN and want to connect using MySQL Shell from your local machine. Which additional configuration is necessary to establish a secure connection?

Options :

A : Configure a bastion service in your VCN and access the DB system through the bastion instance-s internal IP address.

B : Enable SSH public key authentication on the DB system and utilize the \connect command with the public endpoint IP address and private key.

C : Grant your user account the connect privilege for the database and use the mysql command with the DB system-s public endpoint IP address and username/password.

D : Create a route table entry in your VCN routing traffic from your local machine-s subnet to the DB system-s subnet directly.

E : Configure a VPN connection between your local machine and the VCN containing the DB system and connect using the private endpoint IP address.

Answer: B

Question 3

You want to connect your application to a read replica of your MySQL HeatWave service in OCI. Which connection string element is crucial for specifying the read replica endpoint?

Options :

A : The HeatWave service name

B : The database name

C : The read replica endpoint URL

D : The HeatWave cluster identifier

Answer: C

Question 4

Which statement accurately describes the data distribution and processing within a HeatWave cluster?

Options :

A : Data is replicated across all nodes, and each node processes all queries independently.

B : Data is partitioned and stored on specific nodes, while queries are executed in parallel on all nodes.

C : A single node stores and processes all data, while other nodes act as standby replicas.

D : Data is cached in-memory on one node, and queries are offloaded to the database system for execution.

E : Queries are divided into subtasks and distributed to available nodes for parallel execution.

Answer: B

Question 5

You need to update the query_cache_size configuration parameter in your MySQL HeatWave service. Which of the following methods is recommended for a production environment with minimal disruption?

Options :

A : Modify the my.cnf file and restart the HeatWave service

B : Use the ALTER SYSTEM statement directly in the HeatWave SQL shell

C : Update the parameter through the Oracle Cloud Infrastructure (OCI) Console

D : Use the SET GLOBAL statement in a MySQL client session

Answer: C

EXPERTY DESIGNED 1Z0-915-1 PRACTICE TEST