What is Kubernetes - Practice Questions & Exercises

Challenge - 5 Problems

🧠 Conceptual

intermediate

What is the primary purpose of Kubernetes?

Kubernetes is a popular tool in DevOps. What is its main job?

A It is a tool for designing user interfaces.

B It is a programming language used to write cloud apps.

C It manages and runs containers across many computers automatically.

D It is a database system for storing app data.

💡 Hint

Think about how apps run in many small parts called containers.

Kubernetes helps run and manage containers on many machines, making apps reliable and easy to scale.

💻 Command Output

intermediate

What does the command 'kubectl get pods' show?

When you run kubectl get pods, what information do you get?

A A list of running containers (pods) in the current Kubernetes cluster.

B The current version of Kubernetes installed.

C The logs of a specific container.

D The configuration files of the cluster.

💡 Hint

Pods are the smallest units that run containers in Kubernetes.

The command lists all pods, which are groups of containers running in the cluster.

🔀 Workflow

advanced

Order the steps to deploy an app on Kubernetes

Put these steps in the correct order to deploy an app on Kubernetes.

A 1,2,3,4

B 2,1,3,4

C 1,3,2,4

D 1,2,4,3

💡 Hint

Think about writing config first, then applying it, checking status, and finally exposing.

You first write the deployment file, then apply it to create resources, check pods, and expose the app.

❓ Troubleshoot

advanced

What error occurs if a pod's container image is not found?

You deploy a pod but it never starts. The image name is wrong. What error will Kubernetes show?

A PodEvicted

B ImagePullBackOff

C CrashLoopBackOff

D NodeNotReady

💡 Hint

Think about errors related to pulling container images.

ImagePullBackOff means Kubernetes tried but failed to download the container image.

✅ Best Practice

expert

Which practice helps ensure high availability in Kubernetes?

To keep your app always running even if some pods fail, what should you do?

A Deploy pods only on one node to simplify management.

B Use a single pod with a large resource limit.

C Manually restart pods when they fail.

D Run multiple replicas of your pods using a Deployment.

💡 Hint

Think about spreading risk by having copies of your app running.

Running multiple replicas ensures if one pod fails, others keep serving the app.