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What is the main purpose of a rolling update in Kubernetes?

easy📝 Conceptual Q11 of 15
Kubernetes - ReplicaSets and Deployments
What is the main purpose of a rolling update in Kubernetes?
ATo update an application without downtime by gradually replacing pods
BTo delete all pods and recreate them at once
CTo backup the current state of the application
DTo scale the application to zero replicas
Step-by-Step Solution
Solution:

  1. Step 1: Understand rolling update concept

    A rolling update replaces pods one by one to avoid downtime.

  2. Step 2: Compare options with concept

    Only To update an application without downtime by gradually replacing pods describes gradual replacement without downtime.

  3. Final Answer:

    To update an application without downtime by gradually replacing pods -> Option A

  4. Quick Check:

    Rolling update = gradual pod replacement [OK]
Quick Trick: Rolling update means update pods one by one without downtime [OK]
Common Mistakes:
  • Thinking rolling update deletes all pods at once
  • Confusing rolling update with backup
  • Assuming rolling update scales pods to zero

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