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Oracle MySQL HeatWave Implementation Associate Rel 1 Sample Questions (Q14-Q19):

NEW QUESTION # 14
How can you determine the uptime of a DB system?

A. By using the Audit section in Logging information in the OCI Web console
B. By executing mysql db-system get --db-system-id with OCI CLI
C. By querying performance_schema.global_status from a connected MySQL client
D. By checking the DB system details in the OCI Web console

Answer: D

Explanation:
You can determine the uptime of a DB system bychecking the DB system details in the OCI Web console(Answer B). The console provides information on the system status, including the uptime since the last start.
Steps:
* Log in to the OCI Web console.
* Navigate to the MySQL DB system.
* View the details page of the DB system, where the uptime information is displayed.
References:
* OCI Console Documentation
* Monitoring DB System Uptime

NEW QUESTION # 15
You want to import data into a DB system with MySQL Shell util.loadDump().
Which option can speed up the load?

A. deferTableIndexes: all
B. updateGtidSet: off
C. showMetadata: false
D. skipBinlog: true

Answer: A

Explanation:
To speed up the data load into a DB system usingMySQL Shell util.loadDump(), you can use the deferTableIndexes: alloption (Answer D). This option defers the creation of indexes until after the data has been loaded, which can significantly improve the speed of the loading process.
Steps:
* Export your data using MySQL Shell dump utility.
* Useutil.loadDump()to import the data and specify thedeferTableIndexes: alloption.
* The data is loaded without building indexes initially, reducing the time required for the import.
* After the data load is complete, indexes are created in a batch process, which is more efficient than creating them during the data load.
References:
* MySQL Shell Dump & Load Documentation

NEW QUESTION # 16
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-FD1; Secondary instance 1: AD1-FD2; Secondary instance 2: AD1-FD3
B. Primary instance: AD1-FD3; Secondary instance 1: AD1-FD2; Secondary instance 2: AD1-FD3
C. Primary instance: AD1-FD1; Secondary instance 1: AD2-FD2; Secondary instance 2: AD3-FD3
D. Primary instance: AD1-FD3; Secondary instance 1: AD2-FD2; Secondary instance 2: AD3-FD3

Answer: B

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 # 17
What must you do to minimize a DB system down time caused by automatic maintenance operations?

A. Enable crash recovery.
B. Add HeatWave cluster.
C. Create read replicas.
D. Enable high availability.

Answer: D

Explanation:
To minimize DB system downtime caused by automatic maintenance operations, you should enable high availability. High availability ensures that there are multiple instances of your database running in different fault domains or availability domains, reducing the impact of maintenance on the system's availability.

NEW QUESTION # 18
A query is not offloaded to the HeatWave cluster for execution. Which three are possible reasons? (Choose three.)

A. The use_secondary_engine session variable is OFF.
B. The user does not have privileges to access the HeatWave cluster.
C. The query estimated cost is less than the query cost threshold.
D. The client is connected to the DB system instead of the HeatWave cluster.
E. A required column is excluded from the RAPID secondary engine.

Answer: A,D,E

Explanation:
A query may not be offloaded to the HeatWave cluster for execution due to the following reasons:
A:Theuse_secondary_enginesession variable is OFF: This setting controls whether queries should be offloaded to the secondary engine (HeatWave). B.The client is connected to the DB system instead of the HeatWave cluster: For queries to be offloaded, the client must be connected to the HeatWave cluster. E.A required column is excluded from the RAPID secondary engine: If a necessary column is not available in the HeatWave (RAPID) secondary engine, the query cannot be offloaded.

NEW QUESTION # 19
......

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