The company can use the OCI DevOps Triggers feature to automate deployment of their application code changes to the production server. Therefore, the correct answer is: OCI DevOps Triggers feature can be used to automate deployment. OCI DevOps Triggers allow for automatic builds and de-ployments based on changes to the code repository. When a new commit is pushed to the reposito-ry, the trigger can initiate a build pipeline that creates an artifact and deploys the new version of the application to the production server. Here is the link to the official documentation on using triggers in OCI DevOps to automate application deployment: Reference: https://docs.cloud.oracle.com/en-us/iaas/devops/using/using-triggers.htm

The correct answer is: dependency relationships between variables. In an Oracle Cloud Infrastructure (OCI) Resource Manager Schema Document, you can specify various aspects of your template, such as information about the application, permissions, logo, and pattern validations for string-type variables. However, dependency relationships between variables cannot be specified in a Schema Document. Dependency relationships between variables are typically defined in the Terraform con-figuration files themselves rather than in the Schema Document. Terraform allows you to express dependencies between resources and variables directly within the configuration using features like interpolation and variable references. The Schema Document in OCI Resource Manager primarily focuses on providing metadata and validation rules for the template inputs, but it does not include features for defining dependencies between variables.

The statements that are true for scaling an OKE cluster to meet growing demand are:

Enable autoscaling by autoscaling Pods by deploying Kubernetes Autoscaler to collect resource metrics from each worker node in the cluster. Pod autoscaling is a feature that allows you to adjust the number of pods in a deployment or replica set based on the CPU or memory utilization of the pods. You can use Kubernetes Autoscaler, which is an add-on component that you can install on your OKE cluster, to collect resource metrics from each worker node and scale the pods up or down accordingly.

Enable cluster autoscaling by autoscaling node pools by deploying the Kubernetes Autoscaler to automatically resize a cluster's node pools based on application workload demands. Cluster autoscaling is a feature that allows you to adjust the number of nodes in a node pool based on the pod requests and limits of the pods running on the nodes. You can use Kubernetes Autoscaler, which is an add-on component that you can install on your OKE cluster, to monitor the pod requests and limits and scale the node pools up or down accordingly.

Scale a node pool up and down to change the number of worker nodes in the node pool, and the availability domains and subnets in which to place them. A node pool is a group of worker nodes within an OKE cluster that share the same configuration, such as shape, image, subnet, etc. You can use OCI Console, CLI, or API to scale a node pool up and down by adding or removing worker nodes from it. You can also change the availability domains and subnets for your node pool to distribute your nodes across different fault domains. Scaling a node pool allows you to adjust your cluster capacity according to your application workload demands. Verified Reference: [Scaling Clusters - Oracle Cloud Infrastructure Container Engine for Kubernetes], [Scaling Node Pools - Oracle Cloud Infrastructure Container Engine for Kubernetes]

The three actions that the DevOps Engineer must perform to easily manage and troubleshoot applications on Oracle Cloud Infrastructure Container Engine for Kubernetes (OKE) are: Create a service account and the clusterrolebinding, obtain an authentication token for the service account using the kubectl command, and run a kubectl proxy command to enable the Kubernetes dashboard. This allows for easy access to the dashboard and management of deployed applications. Automatically deploy the Kubernetes dashboard during cluster creation, create the cluster using the API, and set the iskubernetesDashboardEnabled attribute to true. This ensures that the Kubernetes dashboard is automatically deployed and accessible. Manually deploy the Kubernetes dashboard on an existing cluster and access it using the appropriate URL. This involves deploying the dashboard manually and accessing it through the specified URL, which allows for management and troubleshooting of applications. Using these actions, the DevOps Engineer can effectively manage and troubleshoot applications deployed on OKE, leveraging the Kubernetes dashboard for enhanced visibility and control.

The configuration error that could lead to the 'unable to clone the repository' error is: Dynamic Groups access and OCI IAM policies to the code repository are not set: This error suggests that the necessary permissions and access controls have not been properly configured for the OCI Code Repository. Dynamic Groups and IAM policies control user access and permissions to various OCI re-sources, including code repositories. Without the correct configuration, the build pipeline is unable to clone the repository and retrieve the source code. The other options mentioned are not directly related to the error mentioned: More stages were added than required to the build pipeline: Adding more stages to the build pipeline than necessary would not cause an error related to cloning the repository. It might impact the overall flow and logic of the pipeline, but it is not directly related to the repository cloning process. Source files connected directly to the build pipeline: Connecting source files directly to the build pipeline is a typical setup and would not cause a 'unable to clone the repository' error. Artifacts and build spec being removed before running the build: Removing artifacts and build specifications before running the build could impact the build process and result in other errors, but it would not specifically cause an error related to cloning the repository. Reference: https://docs.oracle.com/en-us/iaas/Content/devops/using/troubleshooting.htm