CKAD Services and Networking 3

Question 1

What is the valid port range for NodePort Services in Kubernetes?

Accepted Answer

30000-32767

Answer

By default, Kubernetes allocates NodePort values in the range 30000-32767 to avoid conflicts with well-known ports.

Question 2

How do you expose a Deployment named 'webapp' on port 80, targeting container port 8080, as a ClusterIP service?

Accepted Answer

kubectl expose deployment webapp --port=80 --target-port=8080

Answer

'kubectl expose deployment' creates a Service; '--port' is the service port and '--target-port' is the container port.

Question 3

What does 'sessionAffinity: ClientIP' in a Service spec do?

Accepted Answer

Ensures all requests from the same client IP go to the same pod

Answer

ClientIP session affinity makes the service route all requests from the same client IP to the same backend pod.

Question 4

Which kubectl command shows the endpoints (pod IPs) backing a Service named 'myservice'?

Accepted Answer

Both B and C show endpoint IPs

Answer

Both 'kubectl get endpoints myservice' and 'kubectl describe endpoints myservice' show the pod IPs backing the service.

Question 5

An Ingress uses 'pathType: Prefix'. What does this mean for path matching?

Accepted Answer

Any URL starting with the specified path prefix is routed to the backend

Answer

'pathType: Prefix' routes requests where the URL path begins with the specified prefix, including the exact path and any sub-paths.

CKAD - Certified Kubernetes Application Developer Practice Test