An application is exposed via a NodePort Service on port 30080. External users can access it via 'http://node-ip:30080'. However, the Ingress controller cannot reach the Service. What is the most likely cause?

The Ingress controller is not running

The Service type is NodePort, which Ingress controllers cannot use

The Ingress resource references the NodePort instead of the Service name

The Service's 'targetPort' is incorrect

You suspect CoreDNS is not resolving Service names correctly. Which resource would you inspect to review the CoreDNS configuration?

The kubelet config file on each node

The CoreDNS ConfigMap in the kube-system namespace

You need to change the DNS policy for a Pod so it uses the node's DNS settings instead of the cluster DNS. Which field in the Pod spec would you set?

dnsPolicy: ClusterFirstWithHostNet

Certified Kubernetes Administrator (CKA)

Domain 2Objective 5

Troubleshoot Services and Networking CKA Practice Questions (Page 2)

Part of the Troubleshooting domain, which accounts for 30% of the CKA exam. Linux Foundation does not publish an official question count, but from its 120-minute exam (~50–80 total, ~15–24 in this domain), expect 3–5 from this objective — we provide 24 practice questions to prepare you well beyond it. (estimate)

24questions here

5free pages

8concepts

30%of the exam

Questions 6–10

6application · medium
An application is exposed via a NodePort Service on port 30080. External users can access it via 'http://node-ip:30080'. However, the Ingress controller cannot reach the Service. What is the most likely cause?
Select an answer first
7foundation · easy
You suspect CoreDNS is not resolving Service names correctly. Which resource would you inspect to review the CoreDNS configuration?
Select an answer first
8foundation · easy
You need to change the DNS policy for a Pod so it uses the node's DNS settings instead of the cluster DNS. Which field in the Pod spec would you set?
Select an answer first
9foundation · easy
Pods are running but cannot communicate with each other across nodes. Which component is most likely misconfigured?
Select an answer first
10foundation · easy
A Service has endpoints, but traffic sent to the Service's ClusterIP is not reaching the backend Pods. Which component is responsible for forwarding traffic from the Service ClusterIP to the endpoint Pods?
Select an answer first

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Troubleshoot Services and Networking CKA Practice Questions (Page 2)

Questions 6–10

An application is exposed via a NodePort Service on port 30080. External users can access it via 'http://node-ip:30080'. However, the Ingress controller cannot reach the Service. What is the most likely cause?

You suspect CoreDNS is not resolving Service names correctly. Which resource would you inspect to review the CoreDNS configuration?

You need to change the DNS policy for a Pod so it uses the node's DNS settings instead of the cluster DNS. Which field in the Pod spec would you set?

Pods are running but cannot communicate with each other across nodes. Which component is most likely misconfigured?

A Service has endpoints, but traffic sent to the Service's ClusterIP is not reaching the backend Pods. Which component is responsible for forwarding traffic from the Service ClusterIP to the endpoint Pods?

Keep studying — Troubleshooting