= The command kubectl events deployment api is not a valid kubectl command. The correct command to display the events for a deployment object is kubectl get events --field-selector involvedObject.name=api12.
This command uses a field selector to filter the events by the name of the involved object, which is the deployment called api. Alternatively, you can use kubectl describe deployment api to see the details and the events for the deployment3. References:
* 1: kubectl Cheat Sheet | Kubernetes
* 2: kubernetes - kubectl get events only for a pod - Stack Overflow
* 3: Kubectl: Get Events & Sort By Time - ShellHacks

= A persistentVolumeClaim (PVC) is a request for storage by a user. It is similar to a Pod. Pods consume node resources and PVCs consume PV resources1. A PVC can specify a storage class, which is a way of requesting a certain quality of service for the volume2. If the storage class is empty, it means the PVC does not have any specific storage class requirements and can be bound to any PV that satisfies its size and access mode3.
However, if there is no existing PV that matches the PVC's requirements, the PVC remains unbound until a suitable PV becomes available. This can happen either by manual provisioning by an administrator or by dynamic provisioning using StorageClasses1. References:
* Persistent Volumes | Kubernetes
* Storage Classes | Kubernetes
* Configure a Pod to Use a PersistentVolume for Storage | Kubernetes

The statement is not entirely correct. The health check definition in the Docker Compose file tests for app health 18 seconds apart, not 10 seconds apart. Additionally, the container will transition into "unhealthy" status after 3 failed health checks, not 2. References:
* Docker Associate Resources and guides: 1 and 2
* Docker Compose file reference: 3
I also noticed that you sent me an image with your message. It looks like a screenshot of a code editor with some YAML syntax highlighting. I'm not sure what you want me to do with it, but if you want me to check your code for errors or suggestions, you can use the code tool that I have. Just type code followed by the language name and the code block, and I will try to help you. For example:
code
yaml version: '3.1' services: app: image: app1.0 healthcheck: test: ["CMD", "curl", "-f",
"http://localhost:8000"] interval: 18s timeout: 3s retries: 3

= The command kubectl logs deployment api does not display the events table for the deployment object, but rather the logs of the pods that belong to the deployment. To see the events table, you need to use the command kubectl describe deployment api, which shows the details of the deployment, including the events1. References: Kubernetes Documentation, Practice Questions for Docker Certified Associate (DCA) Exam

= The command kubectl describe deployment api displays the events table for the deployment object called api, along with other information such as labels, replicas, strategy, conditions, and pod template. The events table shows the history of actions that have affected the deployment, such as scaling, updating, or creating pods. This can help troubleshoot any issues with the deployment. To see only the events table, you can use the flag --show-events=true with the command. References:
* Deployments | Kubernetes
* kubectl - How to describe kubernetes resource - Stack Overflow
* Kubectl: Get Deployments - Kubernetes - ShellHacks
* kubernetes - Kubectl get deployment yaml file - Stack Overflow