1z0-1094-23 Exam Questions Tutorials

Oracle Data Guard is the method that provides the least downtime for database migration. It ensures high availability, data protection, and disaster recovery for Oracle databases. By maintaining a synchronized standby database, Data Guard enables seamless role transitions and minimal downtime during planned maintenance, making it an optimal choice for migrations requiring continuous availability.

Oracle Zero Downtime Migration (ZDM) leverages several Oracle products and utilities in its migration workflows, including Oracle Data Pump and Oracle GoldenGate. Data Pump is used for high-speed data transfer and migration tasks, while GoldenGate facilitates real-time data replication and integration, allowing for seamless and efficient migrations to Oracle Autonomous Database with minimal downtime.

A Bastion host is used within a network, especially in a private subnet, to provide secure access to Oracle Cloud Infrastructure instances. It acts as a gateway, enabling controlled access to internal instances from an external network, thereby enhancing the security posture by limiting direct exposure of instances to the public internet.

In Oracle Data Integrator (ODI) Change Data Capture (CDC) processes, the JV$D view and J$ table are critical components for monitoring changed data capture activities. The JV$D view provides information about the CDC subscriber view definitions, while the J$ table stores the actual changed data records. Inspecting these database objects can help debug and verify that the CDC process is correctly capturing and writing changed data.