Label selectors (equality, set-based) in Kubernetes - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to select pods with label app equal to nginx.

Kubernetes

kubectl get pods -l app[1]nginx

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

A=

Bin

C!=

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using '==' instead of '=' causes syntax error.

Using '!=' selects pods without the label value.

Using 'in' requires a set, not a single value.

The correct syntax for equality in label selectors is =. So app=nginx selects pods with label app equal to nginx.

2fill in blank

medium

Complete the code to select pods where environment label is not production.

Kubernetes

kubectl get pods -l environment[1]production

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

A=

B!=

Cin

Dnotin

Attempts:

3 left

💡 Hint

Common Mistakes

Using '=' selects pods with the label value equal to production.

Using 'in' or 'notin' requires set syntax with parentheses.

The != operator selects pods where the label value is not equal to the given value.

3fill in blank

hard

Fix the error in the label selector to select pods with tier either frontend or backend.

Kubernetes

kubectl get pods -l tier [1] (frontend,backend)

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

Anotin

B=

C!=

Din

Attempts:

3 left

💡 Hint

Common Mistakes

Using '=' with parentheses causes syntax error.

Using '!=' or 'notin' selects pods outside the set.

The in operator is used with a set of values in parentheses to select pods with label values matching any in the set.

4fill in blank

hard

Complete the code to select pods with role label not in dev or test.

Kubernetes

kubectl get pods -l role [1] (dev,test) 

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

Anotin

Bin

C--selector

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'in' selects pods inside the set, opposite of what is needed.

Adding extra flags after the selector causes errors.

The notin operator selects pods whose label values are not in the given set. No extra flag is needed after the selector.

5fill in blank

hard

Fill both blanks to select pods with label env equal to prod and tier in frontend or backend.

Kubernetes

kubectl get pods -l env[1]prod, tier [2] (frontend,backend)

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

A=

Bin

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '!=' instead of '=' for equality.

Adding extra characters after the selector.

Using 'notin' instead of 'in' for tier.

Use = for equality, in for set membership, and no extra characters after the selector.