1z0-1093-23 Sample Questions Answers

 The recommended subnet configurations for Exadata Database Service are to use regional subnets for both client and backup, or to use a private subnet for client and a private subnet for backup12. Regional subnets span all availability domains in the region, which provides high availability and flexibility for the Exadata Database Service1. Private subnets are isolated from the internet and provide more security and control for the Exadata Database Service1. Using a public subnet for client or backup exposes the Exadata Database Service to the internet, which is not recommended1. Using a service subnet for backup is not supported, as service subnets are reserved for Oracle Cloud Infrastructure services3. References:

• Network Setup for Exadata Cloud Infrastructure Instances
• Service Gateway
• Oracle Exadata Cloud Service (ExaCS) Networking

To consolidate two databases into a single Oracle Home, you need to perform the following actions1:

• Schedule a downtime window with the team using the 193B database. This is necessary because you need to stop the database service and detach the pluggable databases (PDBs) from the source Oracle Home before moving them to the target Oracle Home2.
• Use the Move Database option from the console to relocate the database to the target Oracle Home. This is the easiest and fastest way to move the database and its PDBs to a different Oracle Home. You can use the Oracle Cloud Infrastructure Console or the API to initiate the move operation, which will automatically copy the required files, update the configuration, and restart the database service in the target Oracle Home3.

Therefore, statements A and D are correct, and statements B and C are incorrect. Copying the sqlnet.ora and spfile from OH193_B to OH193_A and restarting PDBs is not sufficient to move the database to a different Oracle Home, as it does not update the Oracle Inventory, the Oracle Restart configuration, or the database registry4. Creating a new container database under OH193B and migrating the PDBs from 193B to 193A is not necessary, as you can move the existing PDBs directly to the target Oracle Home without creating a new container database5. References: 1: Oracle Base Database Services 2023 Professional, Section 4.2.2: Moving a Database to a Different Oracle Home 2: Base Database Service, Section 4.2.2.1: Prerequisites for Moving a Database to a Different Oracle Home 3: Base Database Service, Section 4.2.2.2: Moving a Database to a Different Oracle Home 4: [Oracle Database Administrator’s Guide], Section 2.4.1: Moving Oracle Database to a New Oracle Home 5: [Oracle Database Administrator’s Guide], Section 19.1.1: Overview of Pluggable Database Migration

Oracle database with Object Storage in Oracle Cloud Infrastructure (OCI) can be used for the following use cases:

• Database backups: Oracle Recovery Manager (RMAN) is an Oracle Database client that performs Oracle database backup and recovery. It automates the administration of Oracle backup strategies and greatly simplifies backing up, restoring, and recovering database files. RMAN can use OCI Object Storage as a backup destination, which offers reliable and cost-efficient data durability1.
• Database log files: Oracle Database can use OCI Object Storage as a destination for archiving redo log files, which are generated during normal database operation and contain a record of the changes made to the database. Archiving redo log files to OCI Object Storage can help reduce the storage costs and improve the availability and disaster recovery of the database2.

The other two options are not valid use cases for Oracle database with Object Storage in OCI:

• Database data files: Oracle Database cannot use OCI Object Storage as a storage option for data files, which store the actual data of the database. Data files require block storage, which provides low latency and high performance. OCI Object Storage is an object storage service, which provides high scalability and durability, but not low latency and high performance3.
• Database binaries: Oracle Database cannot use OCI Object Storage as a storage option for database binaries, which are the executable files and libraries that make up the Oracle Database software. Database binaries require a file system, which provides a hierarchical structure and metadata for files and directories. OCI Object Storage is an object storage service, which provides a flat namespace and metadata for objects3.

References: 1: Backing Up to Object Storage 2: Archiving Redo Log Files to Object Storage 3: Object Storage Overview

Before installing a management agent for the OCI Database Management Service, you need to perform the following steps1:

• Create or copy an Agent Install Key. An Agent Install Key is a unique identifier that is used to authenticate the management agent installation process. You can create or copy an Agent Install Key from the OCI Console or the API. You need to provide the Agent Install Key when you run the installation script on the host where you want to install the management agent2.
• Confirm the OS and networking requirements. You need to ensure that the host where you want to install the management agent meets the minimum OS and networking requirements. The OS requirements include the supported OS versions, packages, and permissions. The networking requirements include the firewall rules, proxy settings, and DNS resolution. You can use the preinstall script to verify the OS and networking requirements on the host3.

Therefore, statements A and D are correct, and statements B, C, and E are incorrect. Creating or copying an Agent OCID is not a prerequisite for installing a management agent, as the Agent OCID is generated automatically after the installation is completed4. Patching the database to be managed is not a prerequisite for installing a management agent, as the management agent does not depend on the database version or patch level. Installing TLS 1.3 on the database system is not a prerequisite for installing a management agent, as the management agent uses TLS 1.2 to communicate with the Database Management Service. References: 1: Install Management Agents 2: Create or Copy an Agent Install Key, Section 2.1 3: Confirm the OS and Networking Requirements, Section 2.2 4: View Management Agent Details, Section 3.1 : [Oracle Cloud Infrastructure Documentation], Database Management Service Overview : [Oracle Cloud Infrastructure Documentation], Security in Database Management Service

A Routing Table is a set of rules that determine how traffic is routed within a VCN and to other networks. Each rule consists of a destination CIDR Block and a target, which can be a gateway, a private IP, or a service gateway1. A Routing Table controls only the egress (outbound) traffic from a subnet, not the ingress (inbound) traffic2. Therefore, statements B and F are true, and statements A, C, D, and E are false. References: 1: Oracle Base Database Services 2023 Professional, Section 3.3.2: Routing Tables 2: Base Database Service, Section 2.2.3: Routing Tables

One of the capabilities that the OCI Database Management Service provides using Database Groups is to execute a SQL query for the databases. Database Groups allow you to group your critical Oracle Databases, which reside across compartments, into a Database Group, and monitor them1. You can also create and schedule SQL jobs to perform administrative operations on a single Oracle Database or Database Group2. For example, you can run user-defined SQL jobs on database groups, such as conducting pre-release checks to databases under test3. Therefore, option A is the correct answer and the rest are incorrect. References: 1: Database Management for Oracle Databases - Oracle Help Center 2: Create and Execute Jobs on a Database Group (3:44) 3: Database Management Cloud | Oracle

 According to the Oracle NoSQL Database Cloud Service documentation, the maximum supported rate of DDL operations is 4 DDL operations per minute1. This limit applies to the creation, alteration, and deletion of tables and indexes. If you exceed this limit, you may encounter an OperationThrottlingException2. Therefore, option E is the correct answer and the rest are incorrect. References: 1: Plan your service - Oracle Help Center 2: Oracle NoSQL cloud service - Stack Overflow

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

The correct IAM policy to use to allow a group called DatabaseAdmins to create Exadata Database Services is to allow the group to manage the database-family resource type in the tenancy. The database-family resource type includes all the resources related to Oracle Database services, such as DB systems, databases, backups, patches, and Exadata infrastructure1. The syntax for the policy statement is as follows2:

Allow group DatabaseAdmins to manage database-family in tenancy

This policy statement grants the DatabaseAdmins group the permission to perform any action on any resource in the database-family resource type within the tenancy. This includes creating, updating, deleting, and viewing Exadata Database Services and other database resources12.

The other options are not correct IAM policies to use for this purpose. Option A is not a valid syntax, as the tenancy cannot be used as a target for a policy statement. Option B is not a valid syntax, as the databases cannot be used as a principal for a policy statement. Option D is not sufficient, as it only grants the permission to create database-family resources, but not to manage them. Option E is not comprehensive, as it only grants the permission to manage databases, but not other database-family resources, such as Exadata infrastructure12. References:

• Resource Types - Oracle Help Center
• Policy Syntax - Oracle Help Center

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

When enabling Data Guard on Exadata Database Service, the following two statements are true:

• You should use similar configurations for your Primary and Standby databases to ensure you meet the same performance service level after a role transition. This is a best practice recommended by the Oracle Maximum Availability Architecture (MAA) to avoid any performance degradation or unexpected behavior when switching roles between the primary and standby databases1. Similar configurations include the same database version, edition, shape, storage, and network settings2.
• You can enable Data Guard to support your Standby or Disaster Recovery (DR) needs with a single API call or mouse click in the Ul using cloud automation. This is one of the benefits of using Data Guard on Exadata Database Service, as it simplifies the creation and management of the standby database. You can use the Oracle Cloud Infrastructure Console, the REST API, or the CLI to enable Data Guard when creating a new database or to add Data Guard to an existing database3.

C is incorrect, because Active Data Guard does not provide read/write functionality on the standby or disaster recovery system, but read-only functionality. Active Data Guard allows you to open the standby database for read-only access while it is synchronized with the primary database, enabling real-time query and reporting on the standby database4.

D is incorrect, because you do not have to configure Data Guard manually to create the standby or DR instance for your primary Exadata Database. As mentioned above, you can use cloud automation to enable Data Guard with a single API call or mouse click in the UI3.

E is incorrect, because you can edit your configuration to change between synchronous or asynchronous transport of data to the DR site, after enabling Data Guard. You can use the Oracle Cloud Infrastructure Console, the REST API, or the CLI to modify the Data Guard association and change the protection mode, which determines the data transport method5.

References: 1: Disaster Recovery Best Practices for Exadata Database Machine using Oracle Data Guard 2: About Configuring Oracle Data Guard for Oracle Exadata Database Service on Dedicated Infrastructure 3: Using Oracle Data Guard in Exadata Cloud Service 4: About Oracle Active Data Guard 5: Modifying a Data Guard Association

A Service Gateway is a virtual router that enables private access to multiple Oracle services in the Oracle Services Network, a conceptual network that is reserved for Oracle services and composed of a list of regional CIDR blocks1. A Service Gateway can be used to access Object Storage, which is one of the Oracle services supported by the Service Gateway2. A Service Gateway can only connect to services in the same region of its VCN, not in other regions3. A Service Gateway cannot be used to connect to the Internet, as it does not have a public IP address4. A Service Gateway can be used with either a private or a public subnet, as long as the subnet has a route table that directs traffic to the Service Gateway5. References: 1: Service Gateway | Oracle 2: [Oracle Cloud Infrastructure Documentation] 3: [Oracle Cloud Infrastructure Documentation] 4: [Oracle Cloud Infrastructure Documentation] 5: [Oracle Cloud Infrastructure Documentation]

Big data is a term that refers to large and complex data sets that are beyond the capacity of traditional data processing systems. Big data can be classified into three types based on the structure and format of the data1:

• Structured data: This is data that has a predefined schema and can be easily stored, queried, and analyzed in relational databases. Examples of structured data include customer records, sales transactions, product catalogs, etc.
• Semi-structured data: This is data that does not have a fixed schema, but has some elements of structure that can be extracted and processed. Examples of semi-structured data include XML, JSON, HTML, log files, etc.
• Unstructured data: This is data that has no structure or format and cannot be easily stored or analyzed in relational databases. Examples of unstructured data include text, images, audio, video, social media posts, etc.

Therefore, statement D is incorrect, and statements A, B, and C are correct. Free-structured data is not a valid term for describing big data types. NoSQL Database Cloud Service supports all three types of big data by providing a flexible and scalable data model that can store and query data in various formats, such as JSON, key-value, or fixed-schema2. References: 1: [Oracle Cloud Infrastructure Documentation], Big Data 2: [Oracle Cloud Infrastructure Documentation], NoSQL Database Cloud Service Overview