Free Oracle 1z0-1093-25 Practice Exam with Questions & Answers | Set: 2

Secure Transfer with OCI Data Transfer Service:

TheOCI Data Transfer Serviceis designed to securely transfer large datasets, including database backups, to the cloud. It involves:

Using physical storage appliancesto copy data locally and then shipping these devices to OCI data centers.

Data isencrypted and securely transported, minimizing the risks associated with online transfers.

This method is cost-effective and practical forterabytes or petabytes of data, avoiding bandwidth limitations and reducing transfer time.

Why the other options are incorrect:

A:FTP over the public internet is insecure and slow.

B:Physical hard drives without encryption and secure handling increase data breach risks.

D:SCP over VPN is secure but impractical for extremely large datasets.

E:Data Pump is useful for database-to-database transfers, not large file migrations.

B. Multiple VM Clusters within a single Exadata Infrastructure:

Multiple clusters can coexist, each isolated for specific workloads.

Supports resource optimization and isolation.

E. Sharing a single VCN:

VM Clusters within the same Exadata Infrastructure can be configured to use the same Virtual Cloud Network (VCN), streamlining network management.

Why the other options are incorrect:

A. Only one VM Cluster:Incorrect as multiple clusters are supported.

C. Spanning multiple infrastructures:VM Clusters do not span Exadata Infrastructures; they are confined to a single infrastructure.

D. Dedicated VCN for each cluster:Unnecessary, as clusters can share a VCN.

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.

A:Exadata VM Clusters can be managed independently from the Exadata Infrastructure. This means you can start or stop the cluster without affecting the infrastructure, which provides flexibility for maintenance and performance tuning.

E:The VM Cluster can be terminated without impacting the Exadata Infrastructure. This feature is useful when you want to reassign the infrastructure resources to a new or different cluster.

Why the other options are incorrect:

B:While some adjustments might not need a reboot, core count scaling often requires restarting.

C:Patching the infrastructure and the VM Cluster are separate processes.

D:Changing the infrastructure shape does not automatically adjust VM Cluster resources. Manual reconfiguration is needed.

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.

Comprehensive Monitoring (C):

Database Management supportsdetailed performance monitoringfor Autonomous Databases, including metrics likeCPU usage, I/O statistics, and SQL performance data.

Data Retention Limitation (D):

Theretention period for performance dataon Autonomous Databases is typically shorter than that of manually managed databases due toautomated data management policies.

Why the other options are incorrect:

A:Database Management covers more than just CPU monitoring.

B:Monitoring does not require enabling additional features on the Autonomous Database.

D. Dropping the entire table:

Deleting a table is adestructive operationthat permanently removes the data.

Requires the highest level of permissions due to the potential fordata lossand disruption.

Usually restricted toadministrators or highly privileged users.

Why the other options are incorrect:

A. Simple read operation:Basic permission, often granted to most users.

B. Inserting a row:Requires write permissions, but not as critical as table deletion.

C. Updating a row:Similar to insertion, modifies existing data but does not destroy the table.

C. Private subnet for client network:

Essential for secure access to the databases hosted on the Exadata Database Service instance.

Ensures that client connections are restricted and managed through private IPs.

E. Private subnet for database backups:

Used to securely connect to Oracle Cloud Infrastructure Object Storage for storing backups.

Enables data protection without exposing the backup traffic to the public internet.

Why the other options are incorrect:

A. Public subnet for monitoring:Not required; secure access can be configured through private subnets.

B. Service Gateway:Optional, used for connecting to Oracle services without using the public internet.

D. NAT Gateway:Not mandatory unless specific outbound connectivity is required.

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.

C. To automate various aspects of HeatWave management, such as data placement, node sizing and resource allocation, and query scheduling.

HeatWave AutoPilot Automation:

HeatWave AutoPilot is designed to simplify and optimize the management of HeatWave.

It automates critical tasks like:

Data placement:Optimizing where data is stored in the HeatWave cluster for efficient query processing.

Node sizing and resource allocation:Dynamically adjusting the size of the HeatWave cluster and allocating resources based on workload demands.

Query scheduling:Optimizing the execution of queries for maximum performance.

Enhanced Performance:By automating these tasks, HeatWave AutoPilot helps to ensure optimal performance and resource utilization.

Why the other options are incorrect:

A. Automatically detecting and preventing security vulnerabilities:This is not the primary function of HeatWave AutoPilot.

B. Automatically scaling MySQL instances based on transactional workload:HeatWave is focused on analytical workloads, not transactional scaling.

D. Automatically generating performance reports:While monitoring is important, this isnot the main purpose of AutoPilot.

E. Automatically backing up to OCI Object Storage:Backup and restore are separate functions and not part of AutoPilot's core functionality.