Oracle Cloud Infrastructure 2025 DevOps Professional Free Sample Questions

The OCI DevOps Deployment Pipeline includes a dedicated 'Traffic Shift' stage for managing blue-green and canary deployments on OKE. This stage is the most effective and automated method as it natively handles the controlled redirection of traffic between backend sets (representing the blue and green deployments) associated with a Kubernetes Service of type LoadBalancer. It provides fine-grained control and integrates seamlessly with validation and rollback stages. Using shell scripts or CLI commands introduces manual scripting overhead and is less robust than the purpose-built stage. Redeploying the service manifest is a valid but less controlled approach compared to the Traffic Shift stage.

OCI Service Mesh provides deep observability into traffic between microservices. It automatically collects metrics, logs, and distributed traces, allowing teams to monitor and debug communication without instrumenting the application code itself.

A core feature of OCI Service Mesh is enhancing security by automatically encrypting all traffic between services within the mesh using mutual TLS (mTLS). This enforces a zero-trust security model at the network layer.

For secure access to on-premises resources, the correct approach is to use a private build runner. This runner, hosted on an OCI compute instance within your VCN, can leverage the existing FastConnect circuit. By placing it in a private subnet with appropriate route table entries pointing to the DRG, it can communicate directly and securely with the on-premises Maven repository without any public internet exposure. Oracle-managed runners operate outside your VCN and cannot access private on-premises endpoints.

The most secure and standard OCI practice is to use OCI Vault for secrets management. Credentials should be stored as secrets in a Vault. The build pipeline should be granted access via an IAM policy attached to its dynamic group. The build_spec.yaml can then reference these secrets securely using the ${vaultVariables. } variable substitution syntax, ensuring that credentials are never exposed in plain text within the source code or build specifications.

This statement is false. While OCI Resource Manager's drift detection feature can identify discrepancies, you do not have to apply the changes manually. After a drift is detected, you can run a Terraform 'Apply' job directly from the Resource Manager console to bring the infrastructure back into alignment with the configuration file, thus automating the resolution process.

In a multi-stage Dockerfile, the COPY command with the --from flag is used to copy files or directories from a previous stage (referenced by its name or index) into the current stage. This is the fundamental mechanism for creating a lean production image by selectively transferring only the necessary compiled code, dependencies, or other artifacts, leaving behind the build tools and intermediate files.

A NetworkPolicy is a Kubernetes-native firewalling resource used to control traffic flow at the IP address or port level (OSI layer 3 or 4). To enforce traffic rules between pods, you would create a NetworkPolicy that selects the backend pods and defines an ingress rule allowing traffic only from the web server pods on the specified port (8080). This provides granular, declarative network segmentation within the cluster.

This is the standard, event-driven approach in OCI. OCI DevOps services emit events for pipeline state changes. An OCI Events rule can be configured to filter for the specific 'Deployment Succeeded' or 'Deployment Failed' event type. The action for this rule would be to send the event to an OCI Notifications topic. An OCI Function, which contains the logic to format and send a message to the Slack webhook URL, can subscribe to this topic, triggering the notification.

The Horizontal Pod Autoscaler (HPA) is the Kubernetes component responsible for automatically scaling the number of pods in a ReplicaSet, Deployment, or StatefulSet. It periodically checks metrics such as CPU utilization or custom metrics against a target value defined in the HPA configuration and increases or decreases the number of replicas accordingly. The Cluster Autoscaler scales the number of nodes, and the VPA adjusts the resource requests/limits of individual pods.

Terraform automatically builds a dependency graph by analyzing the references between resources. When the subnet_id argument in the oci_core_instance resource references an attribute of the oci_core_subnet resource (e.g., oci_core_subnet.mysubnet.id), Terraform understands that the subnet must be created before the instance. This is known as an implicit dependency and is the preferred method. The depends_on meta-argument is for creating explicit dependencies when there is no direct reference between resources.