You are automating the deployment of a highly available OKE cluster across multiple availability domains...

Oracle 1z0-1124-25 Question Answer

You are automating the deployment of a highly available OKE cluster across multiple availability domains (ADs) using Terraform. The OKE cluster needs to communicate with a database service running on a Compute instance in a separate private subnet within the same VCN. During the Terraform deployment, you encounter an error indicating that the Kubernetes pods cannot resolve the private IP address of the database instance. You’ve verified that DNS resolution works correctly for other resources within the VCN. What is the MOST probable reason for this DNS resolutionfailure?

The CoreDNS pods within the OKE cluster are not configured to use the VCN’s DNS resolver.

The security list associated with the database subnet does not allow ingress traffic from the OKE cluster’s node pool subnet on port 53 (DNS).

The OKE cluster was created with a public endpoint only, and therefore cannot resolve private IP addresses.

The OKE cluster’s node pool subnet is not associated with a route table that has a rule for the VCN’s DNS resolver.

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Product: 1z0-1124-25
Update on: Jul 22, 2025
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You are automating the deployment of a highly available OKE cluster across multiple availability domains...

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