Which two requirements must be met first to create an Exadata Database Service Instance?

Creating an Exadata Database Service instance is a multi-step process requiring both foundational networking and specific parent resources. First, a Virtual Cloud Network (VCN) must be configured with at least two distinct private subnets: one for client access and another for backup operations. This ensures network isolation and proper traffic routing. Second, the core hardware and virtualization layers must be provisioned by creating an Exadata Infrastructure resource, followed by a VM Cluster resource on that infrastructure. Only after both the networking and the Infrastructure/VM Cluster prerequisites are fulfilled can a database be created.

A. Universal Cloud Credits are a billing mechanism, not a technical prerequisite for resource creation. A VCN alone is insufficient without the required client and backup subnets.
B. The correct terminology is "Private Backup subnet." The term "Service Backup subnet" is incorrect and not used in the context of Exadata Database Service networking configuration.
D. This is incorrect. Creating any major cloud service, especially a complex one like Exadata Database Service, has significant and well-documented prerequisites.

1. Oracle Cloud Infrastructure Documentation - Exadata Database Service on Dedicated Infrastructure, "Prerequisites": This document explicitly states the networking requirements. It details the need for a VCN and recommends two separate private subnets: "one for the client network and one for the backup network to ensure that backup traffic does not impact the client network." This directly supports option C.

Source: Oracle Cloud Infrastructure Documentation, Doc ID: E97964-23, Section: "Getting Started", Subsection: "Prerequisites".

2. Oracle Cloud Infrastructure Documentation - Exadata Database Service on Dedicated Infrastructure, "Creating an Exadata Cloud Infrastructure Instance": This guide outlines the resource hierarchy. It states, "After you have created an Exadata Cloud Infrastructure instance, you can create a VM cluster on the infrastructure to run your Oracle Databases." This establishes the Exadata Infrastructure as a prerequisite for the VM Cluster.

Source: Oracle Cloud Infrastructure Documentation, Doc ID: E97964-23, Section: "Exadata Infrastructure", Subsection: "Creating an Exadata Cloud Infrastructure Instance".

3. Oracle Cloud Infrastructure Documentation - Exadata Database Service on Dedicated Infrastructure, "Creating a VM Cluster": This document continues the procedural hierarchy, stating, "After you have created a VM cluster, you can create databases in the cluster..." This confirms that both the Exadata Infrastructure and the VM Cluster must exist before a database can be created, supporting option E.

Source: Oracle Cloud Infrastructure Documentation, Doc ID: E97964-23, Section: "VM Clusters", Subsection: "Creating a VM Cluster".