Online 1Z0-915-1 Practice Test

Question 1

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 2

You need to set up inbound replication for a specific schema in your on-premises MySQL database to a dedicated table in your MySQL HeatWave replica. Which channel configuration should you utilize?

Options :

A : Use a single channel with a table filter to include only the desired schema from the source.

B : Configure a multi-source channel capturing all changes from the on-premises database and filter specific tables during apply on the HeatWave side.

C : Create a dedicated channel for the target table in the HeatWave replica and specify the source schema and table during channel creation.

D : Implement a statement-based filter on the source database replication plugin to selectively capture changes for the target table.

Answer: C

Question 3

Which type of configuration variables CANNOT be modified in MySQL custom configurations?

Options :

A : Initialization variables

B : User variables

C : System variables

D : Default user variables

Answer: A

Question 4

You accidentally modified the session_cache_size dynamic variable in your MySQL HeatWave service. Which of the following immediate effects will you observe?

Options :

A : Increased HeatWave cluster resource utilization

B : Recalculations of existing materialized views

C : Automatic failover to a standby HeatWave cluster

D : Changes in query execution plans for all running queries

Answer: A

Question 5

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

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