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Quiz 2025 Newest Oracle 1z0-915-1: Examcollection Oracle MySQL HeatWave Implementation Associate Rel 1 Dumps

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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

Backing up and restoring DB systems: For database administrators and disaster recovery specialists, this section of the exam covers backing up and restoring a DB system, managing automatic backups, and performing point-in-time recovery.

Topic 3

Managing DB systems: For network administrators and cloud infrastructure specialists, this domain of the exam covers demonstrating a command of DRG and DRG Attachments, applying BGP in the OCI environment, evaluating OCI VPN Services, and validating the various FastConnect products from OCI.

Topic 4

Read Replicas: For database architects and replication specialists, this domain of the exam covers creating and managing read replicas, describing the read replica load balancer, connecting to a read replica, etc.

Topic 5

Inbound Replication: For database administrators and replication experts, this section of the exam covers setting up and troubleshoot inbound replication and creating channels.

Topic 6

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.

Oracle MySQL HeatWave Implementation Associate Rel 1 Sample Questions (Q20-Q25):

NEW QUESTION # 20
You want to create a read replica on a DB system.
Which is true about the read replica?

A. It must have at least 1 TB of storage
B. It must be a bare metal shape
C. lt must have at least 64 GB of memory.
D. It must have at least 4 OCPUs.

Answer: C

Explanation:
For a read replica on a DB system,it must have at least 64 GB of memory(Answer D). This requirement ensures that the read replica has sufficient resources to handle read operations and maintain performance consistency with the primary DB system.
References:
* OCI MySQL Read Replicas Documentation

NEW QUESTION # 21
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?

A. Check the value of the rapid_query_offload_count global status variable.
B. Query the rpd_tables table in performance_schema.
C. View the Query Execution Plan of the query by running EXPLAIN.
D. Check the value of the hw_data_scanned global status variable.

Answer: A

Explanation:
To determine whether a query is offloaded to the HeatWave cluster for execution,check the value of the rapid_query_offload_countglobal status variable(Answer B).
* rapid_query_offload_count: This variable indicates the number of queries that have been offloaded to the HeatWave cluster. By checking its value before and after running the query, you can determine if the query was offloaded.
Steps:
* Connect to the MySQL DB system.
* RunSHOW GLOBAL STATUS LIKE 'rapid_query_offload_count';before and after executing the query to see if the count increases, indicating offloading.
References:
* MySQL HeatWave Documentation
* Monitoring HeatWave Status Variables

NEW QUESTION # 22
You want to train a classification model with MySQL HeatWave AutoML. Which two are requirements of the training data set? (Choose two.)

A. There must be at least two feature columns.
B. The target column and all feature columns must be stored in a single table.
C. All feature columns must be numeric.
D. The target column must be numeric.
E. The target column must have at least two distinct values.

Answer: B,E

Explanation:
When training a classification model with MySQL HeatWave AutoML, the following requirements must be met:
* The target column and all feature columns must be stored in a single table(Answer B): All data necessary for training the model should be in one table to simplify the data processing and training pipeline.
* The target column must have at least two distinct values(Answer E): For classification tasks, the target column must have multiple distinct values to enable the model to differentiate between classes.
References:
* MySQL HeatWave AutoML Documentation
* MySQL HeatWave User Guide

NEW QUESTION # 23
What happens when you perform a switchover of a high-availability DB system with an attached HeatWave cluster?

A. The HeatWave cluster remains attached to the same DB system and the new primary instance redirects queries to that cluster.
B. The HeatWave cluster is no longer valid; you must re-create the HeatWave cluster.
C. The HeatWave cluster is deleted and a new HeatWave cluster is attached to the new primary instance.
D. The HeatWave cluster is attached to the new primary instance.

Answer: D

Explanation:
When you perform a switchover of a high-availability DB system with an attached HeatWave cluster, theHeatWave cluster is attached to the new primary instance(Answer B). This ensures continuous operation and access to the HeatWave cluster's capabilities without the need to delete or re-create the cluster.
* During a switchover, the system promotes the standby instance to the primary role.
* The HeatWave cluster, which was previously attached to the original primary instance, is now re-attached to the new primary instance.
* This allows the new primary instance to continue processing queries using the HeatWave cluster seamlessly.
References:
* MySQL HeatWave High Availability Documentation

NEW QUESTION # 24
Which placement is NOT valid for a high-availability DB system? (Note: AD refers to availability domain and FD refers to fault domain.)

A. Primary instance: AD1-FD3; Secondary instance 1: AD2-FD2; Secondary instance 2: AD3-FD3
B. Primary instance: AD1-FD1; Secondary instance 1: AD1-FD2; Secondary instance 2: AD1-FD3
C. Primary instance: AD1-FD3; Secondary instance 1: AD1-FD2; Secondary instance 2: AD1-FD3
D. Primary instance: AD1-FD1; Secondary instance 1: AD2-FD2; Secondary instance 2: AD3-FD3

Answer: C

Explanation:
In a high-availability DB system, the placement of primary and secondary instances should ensure redundancy across different availability domains (ADs) and fault domains (FDs) to minimize downtime and data loss. The placement mentioned in option D is not valid because itplaces the primary and secondary instances in the same availability domain and fault domain, which does not provide high availability.

NEW QUESTION # 25
......

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