"Oracle Exadata Cloud Service" (B) offers expanded flexibility with shared or dedicated Exadata
infrastructure, allowing customers to choose between cost-effective shared resources or isolated
dedicated hardware for performance and compliance needs. "Oracle Database Cloud Service" (A) is
VM-based and lacks Exadata’s hardware integration, "Oracle Autonomous Database" (C) is fully
managed without hardware choice, and "Oracle Exalogic Cloud Service" (D) is an outdated
middleware platform, not database-focused. Oracle’s documentation highlights Exadata Cloud
Service’s deployment options.
Reference: Oracle Exadata Cloud Service Overview, OCI Database Options Guide.
