Why labels organize resources in Kubernetes - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to add a label to a Kubernetes pod.

Kubernetes

kubectl label pods my-pod environment=production [1]

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A--overwrite

B--selector

C--all

D--dry-run

Attempts:

3 left

💡 Hint

Common Mistakes

Using --selector instead of --overwrite

Forgetting to add the flag causes error if label exists

The --overwrite flag allows updating an existing label on the pod.

2fill in blank

medium

Complete the command to list pods with the label app=frontend.

Kubernetes

kubectl get pods -l [1]

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Atier=database

Bapp=backend

Capp=frontend

Denvironment=production

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong label key or value

Omitting the -l flag

The -l flag filters pods by label. Here, we want pods labeled app=frontend.

3fill in blank

hard

Fix the error in the command to delete pods with label tier=backend.

Kubernetes

kubectl delete pods -l [1]

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Atier=frontend

Btier=backend

Capp=backend

Denvironment=staging

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong label value

Deleting pods without label filter

The command deletes pods with label tier=backend. Using the correct label ensures the right pods are deleted.

4fill in blank

hard

Fill both blanks to create a label selector for pods with app=web and environment=prod.

Kubernetes

kubectl get pods -l [1],[2]

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Aapp=web

Bapp=api

Cenvironment=prod

Denvironment=dev

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong label keys or values

Adding spaces after commas

Multiple labels can be combined with commas. Here, app=web and environment=prod select pods matching both labels.

5fill in blank

hard

Fill all three blanks to create a dictionary of labels in a pod YAML manifest.

Kubernetes

metadata:
  labels:
    [1]: [2]
    [3]: production

Drag options to blanks, or click blank then click option'

Aapp

Bfrontend

Cenvironment

Dbackend

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping keys and values

Using incorrect label names

Labels in YAML are key-value pairs. Here, app: frontend and environment: production label the pod correctly.