Vce 1z0-1093-25 Questions Latest

C. Using Oracle Data Guard for a switchover operation:

Aswitchoveris a planned role reversal between the primary and standby databases.

Zero data loss:Since both databases are synchronized, it minimizes downtime.

Ideal for planned maintenance:The primary database is switched to the standby, allowing maintenance on the original primary without downtime.

Data Guard Switchover:

sql

CopyEdit

ALTER DATABASE SWITCHOVER TO standby_db;

Why the other options are incorrect:

A. Full backup with RMAN:Backup does not ensure availability during maintenance.

B. In-place upgrade:Typically involves downtime.

D. Quarterly patch:Patching often requires database restarts, causing downtime.

E. Resizing block volume:Does not maintain availability if the database requires restarting.

C. Define VCN, Private Client subnet, and Private Backup subnet:

These network components are necessary to ensure secure connectivity and backup configurations.

TheVCN (Virtual Cloud Network)provides network isolation.

ThePrivate Client subnetenables secure client connections.

ThePrivate Backup subnetis required for secure access toOCI Object Storagefor backups.

E. Create Exadata Infrastructure and VM Cluster resource:

Exadata Infrastructure represents the physical hardware.

VM Cluster resource defines compute and storage resources for the databases.

Both must be set up before provisioning the actual database instance.

Why the other options are incorrect:

A. VCN and Universal Cloud Credits:Insufficient; more configuration is needed.

B. Service Backup subnet:Incorrect, it should be aPrivate Backup subnet.

D. No prerequisites:Incorrect; prerequisites include both network and infrastructure setup.

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.