You have a ClusterIP service named 'database' in the 'backend' namespace. An application pod in the 'frontend' namespace needs to connect to this service using DNS. What DNS name should the application use?

backend.database.svc.cluster.local

database.backend.svc.cluster.local

You create a NodePort service with 'nodePort: 30080'. You want to access the service from outside the cluster. What address should you use?

The service's DNS name and port 30080

You have a LoadBalancer service in a cloud environment. You notice that the external IP is not accessible from the internet, but it is accessible from within the cluster. You have verified that the service has endpoints and the cloud load balancer is healthy. What is a likely cause?

The service's nodePort is not in the valid range.

The cloud security group or firewall is blocking inbound traffic on the service port.

The service's selector does not match any pods.

The service's externalTrafficPolicy is set to 'Local', which prevents external access.

Which component is responsible for creating the external load balancer when a LoadBalancer service is created?

The kubelet on the master node.

You create a LoadBalancer service in a cloud environment. You notice that the service has an external IP assigned, but you also see that a NodePort was automatically created. What is the purpose of this NodePort?

It is a leftover from a previous service configuration.

It provides an alternative way to access the service from outside the cluster.

It is used for internal cluster communication between services.

It is used by the cloud load balancer to forward traffic to the nodes.

Certified Kubernetes Administrator (CKA)

Domain 5Objective 3

Use ClusterIP, NodePort, LoadBalancer Service Types and Endpoints CKA Practice Questions (Page 4)

Part of the Servicing and Networking domain, which accounts for 20% of the CKA exam. Linux Foundation does not publish an official question count, but from its 120-minute exam (~50–80 total, ~10–16 in this domain), expect 2–3 from this objective — we provide 23 practice questions to prepare you well beyond it. (estimate)

23questions here

5free pages

7concepts

20%of the exam

Questions 16–20

16application · medium
You have a ClusterIP service named 'database' in the 'backend' namespace. An application pod in the 'frontend' namespace needs to connect to this service using DNS. What DNS name should the application use?
Select an answer first
17application · easy
You create a NodePort service with 'nodePort: 30080'. You want to access the service from outside the cluster. What address should you use?
Select an answer first
18expert · medium
You have a LoadBalancer service in a cloud environment. You notice that the external IP is not accessible from the internet, but it is accessible from within the cluster. You have verified that the service has endpoints and the cloud load balancer is healthy. What is a likely cause?
Select an answer first
19foundation · easy
Which component is responsible for creating the external load balancer when a LoadBalancer service is created?
Select an answer first
20application · medium
You create a LoadBalancer service in a cloud environment. You notice that the service has an external IP assigned, but you also see that a NodePort was automatically created. What is the purpose of this NodePort?
Select an answer first

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