Easy — CKA Practice Quiz

Question 1

A development team has a backend API running as a Deployment named `orders-api` in the `commerce` namespace. The API only needs to be reachable by other Pods inside the cluster (a frontend Deployment and a batch worker), and must NOT be exposed to any external network or node IP. The team asks you to create a Service that provides a stable virtual IP and DNS name for in-cluster access while minimizing the attack surface. Which Service type should you use?

Accepted Answer

ClusterIP — the default type, which allocates an internal virtual IP reachable only from within the cluster

Answer

NodePort — so the API is reachable on a static port across all node IPs for internal callers

Answer

LoadBalancer — to provision a cloud load balancer that other Pods connect to through its external IP

Answer

ExternalName — to map the Service to an external DNS name for internal Pods to resolve

Question 2

You deployed a new version of an application by updating the image on a Deployment named 'payment-api'. After the rollout completes, users report errors and you confirm the new image is broken. You need to quickly revert 'payment-api' to the exact configuration it had before this latest update, while preserving the ability to inspect what changed. Which command accomplishes this most directly?

Accepted Answer

kubectl rollout undo deployment/payment-api

Answer

kubectl rollout restart deployment/payment-api

Answer

kubectl scale deployment/payment-api --replicas=0 && kubectl scale deployment/payment-api --replicas=3

Answer

kubectl delete deployment payment-api && kubectl apply -f payment-api.yaml

Question 3

You maintain a Deployment named `web` running 3 replicas. Marketing needs the app to handle a traffic spike, so you must temporarily scale it to 10 replicas without editing or reapplying the Deployment manifest and without triggering a new rollout of the pod template. Which command accomplishes this most directly?

Accepted Answer

kubectl scale deployment web --replicas=10

Answer

kubectl rollout restart deployment web --replicas=10

Answer

kubectl edit deployment web and change the image tag to force a new ReplicaSet with 10 pods

Answer

kubectl autoscale deployment web --min=10 --max=10

Question 4

You are the administrator of a kubeadm-managed cluster currently running control-plane version v1.28.3. Before beginning an upgrade, you want to verify which target versions are available and confirm the component version state without making any changes to the cluster. Which command should you run on the first control-plane node?

Accepted Answer

kubeadm upgrade plan

Answer

kubeadm upgrade apply v1.29.0 --dry-run

Answer

kubeadm config images list

Answer

kubectl get nodes -o wide

Question 5

A pod named `web-stack` in the `frontend` namespace runs two containers: `nginx` and `log-agent`. Users report the web page returns HTTP 502 errors. You run `kubectl logs web-stack -n frontend` and receive the error: `Error from server (BadRequest): a container name must be specified for pod web-stack`. You need to view only the logs from the `nginx` container to diagnose the 502. Which command retrieves the correct container's logs?

Accepted Answer

kubectl logs web-stack -c nginx -n frontend

Answer

kubectl logs web-stack --all-containers -n frontend | grep nginx

Answer

kubectl logs web-stack -n frontend --container=log-agent

Answer

kubectl describe pod web-stack -n frontend | grep nginx