1z0-1093-23 Exam Dumps : Oracle Base Database Services 2023 Professional

Regarding MySQL Database Service HeatWave, the following two statements are true:

• HeatWave uses machine learning to automate operations, increase DBA productivity, and reduce costs. HeatWave has several features that leverage machine learning to optimize the performance and efficiency of the service, such as12:
• HeatWave is an in-memory, query-processing engine designed for fast execution of analytic queries. HeatWave is a massively parallel, distributed system that runs analytic queries in memory, using columnar data formats, vectorized execution, and adaptive algorithms. HeatWave can accelerate MySQL performance by orders of magnitude for analytics workloads, mixed workloads, and machine learning.

B is incorrect, because HeatWave does not use periodic long-running ETL batch jobs to refresh data, but a novel technique called dual-format storage. HeatWave stores data in both row and column formats, and synchronizes the data between the two formats in real time. This eliminates the need for ETL processes and enables fast execution of both transactional and analytic queries on the same data.

D is incorrect, because the HeatWave data that is needed for analytic processing is not stored in disk files, but in memory. HeatWave uses sparse files to store the columnar data in memory, which are compressed and encrypted. HeatWave also supports querying data in object storage, such as Oracle Cloud Infrastructure Object Storage or Amazon S3, using the HeatWave Lakehouse feature.

References: 1: MySQL HeatWave Database Service | Oracle 2: HeatWave | Oracle 3: MySQL HeatWave User Guide :: 10 Machine Learning in MySQL HeatWave 4: MySQL HeatWave User Guide :: 9 HeatWave Autopilot 5: MySQL HeatWave User Guide :: 8 HeatWave Advisor : MySQL HeatWave User Guide :: 1 Overview : MySQL HeatWave User Guide :: 2 HeatWave Architecture : MySQL HeatWave User Guide :: 3 HeatWave Data

 To perform actions on a NoSQL table, such as creating, updating, deleting, or querying rows, you need to have the appropriate permissions granted by an IAM policy. The permissions are defined by the combination of the verb and the resource type. For example, the NOSQL_TABLE_WRITE permission allows you to create or update a table, and the NOSQL_ROWS_INSERT permission allows you to insert rows into a table1.

The other options are not correct permissions to perform actions on a NoSQL table. The NOSQL_ROWS_READ and NOSQL_ROWS_DELETE permissions only allow you to read or delete rows from a table, but not to insert or update them1. The NOSQL_TABLE_INSPECT and NOSQL_TABLE_UPDATE permissions only allow you to list or modify the properties of a table, but not to create or delete it1. The NOSQL_TABLE_DESTROY and NOSQL_TABLE_ALTER permissions only allow you to drop or alter a table, but not to create or update it1. References:

• Oracle NoSQL Database Cloud Service Policies Reference

To change the backup window start time for a MySQL Database Service system, you need to select Backup Window from the Edit MySQL DB System Details page and set the start time to 4 AM. This option allows you to specify the time range during which automatic backups are performed. You can also enable or disable automatic backups from this page. The other options are incorrect because they do not apply to MySQL Database Service systems. The mysqlbackup command is a tool for backing up and restoring MySQL databases, but it is not used to configure the backup window for MySQL Database Service systems. The OCI MySQL DB System Details page does not have an option to specify the backup window start time or to enable automatic backups. The Enable Automatic Backups time is not a valid setting for MySQL Database Service systems. References:

• 3: About Oracle Base Database Service - Oracle Help Center
• 4: Back Up and Recovery in Base Database Service - Oracle Help Center
• 5: About Oracle Base Database Service - Oracle Help Center