CKAD Pod Design and Deployments 2

Question 1

Which annotation is required on a Deployment to enable revision history tracking for rollbacks?

Accepted Answer

kubernetes.io/change-cause

Answer

The 'kubernetes.io/change-cause' annotation records a human-readable reason for each revision, visible in 'kubectl rollout history'.

Question 2

A Deployment has 'revisionHistoryLimit: 3'. What does this mean?

Accepted Answer

Only the last 3 ReplicaSets are kept for rollback

Answer

'revisionHistoryLimit' controls how many old ReplicaSets are retained for rollback purposes.

Question 3

What happens to a Deployment when you run 'kubectl rollout pause deployment/myapp'?

Accepted Answer

The rollout is paused and no further changes are propagated

Answer

Pausing a deployment halts the rollout so you can make multiple changes before resuming, acting as a canary mechanism.

Question 4

Which field in a Pod spec defines the node selection using key-value pairs that must exactly match node labels?

Accepted Answer

nodeSelector

Answer

'nodeSelector' is the simplest node constraint, requiring pods to be scheduled only on nodes with matching labels.

Question 5

What is the effect of setting 'minReadySeconds: 30' in a Deployment?

Accepted Answer

Pods must be ready for 30 seconds before the rollout proceeds

Answer

'minReadySeconds' ensures a new pod has been Running and Ready for at least that duration before it counts as available.

CKAD - Certified Kubernetes Application Developer Practice Test