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

To use the MySQL Database Service, you need to have the following three prerequisites1:

• You must create a tenancy and be able to sign in to it. A tenancy is a secure and isolated partition within Oracle Cloud Infrastructure where you can create, organize, and administer your cloud resources2. You need to have a valid Oracle Cloud account and credentials to access your tenancy and use the MySQL Database Service.
• You must create a compartment to store your resources. A compartment is a logical container that you can use to organize and isolate your cloud resources within a tenancy3. You can create one or more compartments to store your MySQL Database Service resources, such as MySQL DB systems, backups, and connections. You can also control the access and permissions for each compartment using policies4.
• You or your group must be granted the policies described in Mandatory Policies. Policies are documents that specify who can access which resources, and how5. To use the MySQL Database Service, you need to have the necessary permissions to create and manage the MySQL Database Service resources, as well as the related Oracle Cloud Infrastructure resources, such as Virtual Cloud Networks, subnets, and security lists. The documentation provides a list of mandatory policies that you or your group must be granted to use the MySQL Database Service.

D is incorrect, because you do not have to download the latest MySQL version from https://edelivery.oracle.com/. The MySQL Database Service is a fully managed service that provides you with the MySQL version that you select when creating a MySQL DB system. You do not have to download or install any MySQL software on Oracle Cloud Infrastructure.

E is incorrect, because you do not have to install the downloaded MySQL version onto Oracle Cloud Infrastructure. As mentioned above, the MySQL Database Service is a fully managed service that handles the installation and configuration of the MySQL software for you.

References: 1: Getting Started With MySQL Database Service 2: About Your Tenancy 3: About Compartments 4: Managing Compartments 5: About Policies : Mandatory Policies : Creating a MySQL DB System

Oracle recommends that you do not stop any servers or database instances before applying a patch to your DB system. Stopping the servers or instances can cause the patching process to fail or take longer than expected. Instead, you should run the precheck operation before you apply any update to verify that your DB system meets the patching prerequisites. You should also back up your databases before you apply any updates to your system, and patch the DB system before updating a database for DB systems with Grid Infrastructure/ASM storage management. Therefore, statement D is not an Oracle best practice and the rest are. References:

• 3: In-Place Upgrade for Database Cloud Service (DBCS) VM DB Systems
• 4: Update a DB System - Oracle Help Center

The method that you must use to patch databases on Exadata Database Service with the least amount of downtime is to create a Data Guard standby and execute standby first patching. This method involves creating a physical standby database on a different Exadata system with the same configuration as the primary database, and then applying the patch to the standby database first. After verifying that the patch is applied successfully and the standby database is in sync with the primary database, you can perform a switchover to make the standby database the new primary database. This way, you can minimize the downtime of the primary database and ensure a smooth patching process1. You can use the Oracle Data Guard Broker or the dbaascli utility to create and manage the Data Guard configuration2.

The other options are not the best methods to patch databases on Exadata Database Service with the least amount of downtime because:

• A. Conduct in place patching of the database Home: This method involves applying the patch directly to the database home of the primary database. This method requires you to shut down the database and restart it after the patching, which can cause a significant downtime and potential data loss1.
• B. Leverage Patchmgr to execute patching the database Home: This method involves using the patchmgr tool to patch the database home of the primary database. This method also requires you to shut down the database and restart it after the patching, which can cause a significant downtime and potential data loss1. The patchmgr tool is mainly used for patching the operating system of the Exadata compute nodes, not the database home3.
• D. Leverage Opatch to execute patching the database Home: This method involves using the opatch tool to patch the database home of the primary database. This method also requires you to shut down the database and restart it after the patching, which can cause a significant downtime and potential data loss1. The opatch tool is mainly used for applying one-off patches, not the quarterly patch updates4.
• E. Move the database to a new Home with the desired patch level: This method involves creating a new database home with the desired patch level and then moving the database to the new home. This method can reduce the downtime compared to the in-place patching methods, but it still requires you to stop and start the database during the move operation1. This method also consumes more storage space and requires more steps to complete1.

References: 1: Patching Exadata Cloud Service 2: Using Oracle Data Guard on Exadata Cloud Service 3: Updating Guest VM Operating System 4: Patching Oracle Database and Oracle Grid Infrastructure Software Manually 5: Patching Exadata Cloud Service 6: Using Oracle Data Guard on Exadata Cloud Service 7: Patching Oracle Database and Oracle Grid Infrastructure Software Manually

• Security Lists in OCI: Security Lists act as virtual firewalls for instances within a Virtual Cloud Network (VCN). They define a set of rules for controlling network traffic at the subnet level.
• Incorrect Statements:

References:

• OCI Security Lists: https://docs.oracle.com/en-us/iaas/Content/Network/Concepts/securitylists.htm

The NoSQLHandle interface is used to access Oracle NoSQL tables and perform various operations on them, such as getting, putting, deleting, querying, and indexing rows. However, it is not used to set the row retention time, which is a property of the table itself. The row retention time is specified when creating or altering a table using the TableRequest class, which is a subclass of Request. The NoSQLHandle interface does not have a method to create or alter tables, only to execute requests that are already created by the application12. References:

• NoSQLHandle (Oracle NoSQL Database Java API)
• Obtaining a NoSQL handle - Oracle Help Center