1z0-1093-25 Oracle Cloud Database Services 2025 Professional Free Practice Exam Questions (2025 Updated)

A. Automatically optimizing query execution plans for best performance.

Query Optimization:

Query optimization is handled by the database engine itself, not the SDK.

SDKs are primarily focused on providing an interface for data operations, not on internal query optimization.

Why the other options are typical SDK functions:

B. Constructing requests:SDKs facilitate building and sending data manipulation requests.

C. Serializing data:Converting data between application objects and database formats is a core SDK function.

D. Handling pagination:SDKs often include utilities to manage large result sets.

Tagging in Database Management:

Tags in Oracle Cloud Infrastructure are essential fororganizing and managing resources.

Grouping Databases (A):Tags allow databases to be grouped logically, simplifying management and performance analysis.

Filtering and Searching (C):Tags make it easier to find specific databases within theDatabase Management console, improving efficiency in large environments.

Why the other options are incorrect:

B:Tags do not propagate automatically; they must be configured properly.

D:Tags are actively used in Database Management for organizing and filtering.

Recommended Patching Order:

In Oracle environments, it is crucial to patchGrid Infrastructure (GI) firstbecause GI components are responsible formanaging cluster resources and storage. Applying GI patches before database patches ensures that the underlying infrastructure is compatible and stable.

After the GI patching,validatethe environment to ensure all components are functioningcorrectly before proceeding with database software updates.

This order minimizes the risk ofdowntime or compatibility issues.

Why the other options are incorrect:

A:OCI does not automatically handle manual patching in non-managed DB systems.

B:Applying the database patch first may result in compatibility problems.

D:Users can manually patch Grid Infrastructure in BaseDB VMs.

B. Using Data Guard for physical standby and switchover:

This method enablesminimal downtimemigration.

Steps:

Configure Data Guard to synchronize thestandby databasewith the primary on-premises database.

Once synchronized, perform aswitchoverto make the standby the new primary.

Downtime is limited to the switchover duration.

This approach leveragesreal-time replicationto minimize disruption.

Why the other options are incorrect:

A. Export/Import with Data Pump:Too time-consuming for large databases.

C. Full backup and restore:High downtime due to the time required for data transfer and restoration.

D. Copying via SQL Developer:Not feasible for mission-critical and large databases due to slow transfer speeds.

B. Full root access:

Customers have root-level access to manage the OS, install custom software, and configure settings.

This provides flexibility to meet specific application requirements.

D. Responsibility for OS security:

With root access, customers must manage OS security, including updates and patches.

Oracle provides tools to facilitate patching, but the responsibility lies with the customer.

Why the other options are incorrect:

A. Restricted SSH access:SSH access is allowed for VM DB systems.

C. Oracle-managed OS patching:Oracle does not automatically patch the OS; this is a customer responsibility.

E. Initial OS installation by customers:The OS is pre-installed, but ongoing maintenance is customer-driven.

C. Utilizing OCI Database backups:

Integrated withOracle Cloud Infrastructure (OCI), providing consistent and complete backups.

Supports both theMySQL Database System and the HeatWave cluster, ensuring data integrity.

Automates backup scheduling and retention policies.

Facilitates easy restoration in case of data loss or corruption.

Why the other options are incorrect:

A. Manual copying:Prone to errors and lacks consistency.

B. Manual dumps to Object Storage:Labor-intensive and not automated.

D. MySQL replication:Suitable for high availability, but not a substitute for regular backups.

E. MySQL Enterprise Backup on nodes:Complex and not designed for HeatWave's distributed environment.

C. Defines CPU, memory, and network bandwidth:

TheCompute Shapespecifies the resources allocated to the VM.

Shapes vary in the number ofOCPUs, amount ofRAM, andnetwork performance.

Selecting an appropriate shape ensures the database has enough computational power and memory to meet workload demands.

Why the other options are incorrect:

A. Number of databases:Limited by storage and resource capacity, not the shape itself.

B. Availability domain:Chosen separately during provisioning.

D. Pre-installed software version:The shape does not determine the database version.

Database Software Upgrade:

When upgrading theOracle Database software versionon aBaseDB VM, a newOracle Homeis created to house the upgraded software. Once the database is moved to this new home, the process isnot easily reversible.

Rolling back would requiredowngrading, which is a complex and risky process.

The new Oracle Home ensures that the upgraded database environment isisolated from the previous version, preventing compatibility conflicts.

Why the other options are incorrect:

A:Grid Infrastructure upgrades can be managed independently of the database upgrade.

B:Scaling VMs is a reversible operation.

D:OS patches do not impact the Oracle Home directly.

E:ASM configuration changes are reversible.

Scaling HeatWave Efficiently:

TheOCI CLI or Consoleprovides a streamlined way to scale the HeatWave cluster. You can easily change theshape and node countthrough the console without significant downtime. The system handles the necessary data redistribution and configuration updates automatically.

This method minimizes disruption and is significantly faster than manual reconfiguration.

OCI’s automated scaling ensures that the cluster maintainsoptimal performancethroughout the operation.

Why the other options are incorrect:

A:Adjusting buffer size affects memory, not cluster size.

C:Changing VM shapes does not directly affect HeatWave.

D:Recreating the cluster is inefficient and time-consuming.

E:Manual export/import introduces downtime and is not efficient for scaling.

A. Service Gateway for Oracle Services:

Ensures the HeatWave DB System can accessOracle Serviceslike Object Storage without using the public internet.

Essential for tasks such aspatching and backups.

C. Ingress security rules:

Allows necessary traffic to reach the HeatWave DB System.

Typically, rules will permitMySQL port (3306)and anyapplication-specific ports.

Configured usingVCN security lists or NSGs.

Why the other options are incorrect:

B. Public subnet deployment:Exposes the database to the internet, which is a security risk.

D. Dynamic routing gateway:Not mandatory unless inter-VCN connectivity is specifically required.

E. Blocking egress entirely:Restricting all outbound traffic can prevent necessary updates and communication with Oracle services.

Responsibility of DBA:

Before upgrading the Oracle Database software on aBaseDB VM system, the DBA must verify that theunderlying operating system versionis compatible with the new database software version. This is crucial because Oracle Database upgrades may introduce new requirements or dependencies.

The DBA needs to check theOracle Database Upgrade Guideand theOracle Validated Configurationsto ensure compatibility. Upgrading without this validation could lead to compatibility issues, failed upgrades, or reduced performance.

Why the other options are incorrect:

A:OCI manages the infrastructure, but the DBA must ensure compatibility.

C:While OCI manages the OS patching, ensuring compatibility is still a DBA responsibility.

D:OS updates should be addressed before the database upgrade, not afterward.

Exadata Smart Scan:

This technology is a core feature of Exadata storage servers. It allows the storage servers to perform data filtering, projection, and other processing tasks directly within the storage tier before sending the results to the database compute nodes. This significantly reduces the amount of data transferred over the network, leading to improved query performance.

Why the other options are incorrect:

A. Oracle Data Guard:Used for disaster recovery and high availability, not for in-storage processing.

C. Oracle Active Data Guard:Allows read-only access to a standby database, but doesn’t provide in-storage processing.

D. Exadata Smart Flash Cache:Used for caching frequently accessed data in flash memory to improve I/O performance. While it enhances performance, it does not provide intelligent data offloading and processing within the storage tier.

Backup Retention Policy:

When aBaseDB system is terminated, automatic backups are not immediately deleted. Instead, they remain stored inOCI Object Storagefor the duration specified by thebackup retention policythat was configured at the time of database creation.

This approach ensures that data can be recovered even after the database instance itself is terminated.

Administrators can manually delete backups if they are no longer needed, but they arenot automatically purged.

Why the other options are incorrect:

A:Backups are not deleted instantly upon termination.

B:All backups are retained as per the policy, not just the most recent.

D:No automatic migration to archive tier occurs.

E:Backup retention settings are defined during provisioning, but not dynamically configurable after termination.

B. Social Media Platform:

Social media applications require quick retrieval of user profiles based on unique IDs.

The key-value model supports fast lookups and simple data associations, ideal for user-centric data.

The flexibility of storing user attributes in a single document enhances performance and scalability.

Why the other options are incorrect:

A. Complex analytical queries:Relational or analytical databases are better suited.

C. Financial systems:Require ACID compliance and complex joins, not suitable for key-value models.

D. Content management:Typically requires a more structured approach, better handled by document databases.

E. ERP systems:Need relational integrity and complex schema support.

B:Database Management directly queries the database to gather performance data, such as SQL performance and active session history. It also integrates with OCI Monitoring for infrastructure-level metrics like CPU, memory, and storage utilization.

C:Database Management can function independently of OCI Monitoring since it has its own data collection mechanisms.

Why the other options are incorrect:

A:Database Management does not rely solely on OCI Monitoring.

D:It does not require custom metrics from the user.

A. Secure Communication Channel:

The Oracle Management Agent acts as a bridge between theDatabase Management Serviceand the database.

Enables secure data collection, monitoring, and performance analysis.

Uses encryption to protect data during transmission.

Facilitates monitoring, alerting, and management through OCI services.

Why the other options are incorrect:

B. Backup and recovery operations:These are typically handled by backup tools, not the management agent.

C. OS management:The agent does not manage the operating system itself.

D. Patching and upgrades:While it can assist, it is not specifically designed for patch management.

A. dcli -g cell_group "list cell attributes name, status" combined with dcli -g dbnodes "srvctl status database -d dbname"

dcli Utility:

dcli(Distributed Command Line Interface) allows you to run commands on multiple nodes simultaneously.

cell_group: A group configuration file listing all storage cells.

dbnodes: A group configuration file listing all database nodes.

Commands Explanation:

dcli -g cell_group "list cell attributes name, status":

Retrieves the name and current status of each storage cell.

dcli -g dbnodes "srvctl status database -d dbname":

Checks the status of the database instances on the compute nodes.

Combining these commands provides a complete picture of both storage and compute components.

Why the other options are incorrect:

B. Including metriccurrent:Produces excessive output, not suitable for a quick health check.

C. Listing dbnodes only:Insufficient as it lacks storage cell status.

D. dcli -g all "list status":Invalid syntax and lacks specificity.

B. Testing patches in a non-production environment:

Critical to ensure that the patch does not introduce performance issues or compatibility problems.

Best Practice:Apply the patch to astaging environmentthat mirrors production, validate stability, and then proceed to production.

Minimizes the risk of unplanned downtime or disruptions.

Why the other options are incorrect:

A. Immediate application in production:Risky as untested patches might cause outages.

C. Automatic patching by OCI:OCI does not automatically apply database patches; the customer must manage this.

D. Patching the standby and failing over:While a good strategy when applicable, it still requires prior testing.

B. Only compatible Database Versions are presented:

The provisioning process filters out incompatible combinations, presenting only database versions that match the chosen OS image.

This ensures that the database software can run properly on the selected OS.

This compatibility check prevents deployment failures and ensures system stability.

Why the other options are incorrect:

A. All Database Versions are compatible:Incorrect; some versions are OS-specific.

C. Automatic OS upgrade:OCI does not automatically upgrade the OS for compatibility.

D. Database version determines OS image:The OS image is selected independently, with the system ensuring compatibility.