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What is the primary purpose of scaling a Docker service?

easy📝 Conceptual Q1 of 15
Docker - Swarm
What is the primary purpose of scaling a Docker service?
ATo remove the service from the Docker swarm
BTo increase or decrease the number of container instances running
CTo update the service's network settings
DTo change the Docker image used by the service
Step-by-Step Solution
Solution:

  1. Step 1: Understand service scaling concept

    Scaling means adjusting how many copies of a service run to handle load.

  2. Step 2: Identify the correct purpose

    Increasing or decreasing container instances matches scaling definition.

  3. Final Answer:

    To increase or decrease the number of container instances running -> Option B

  4. Quick Check:

    Service scaling = Adjust container count [OK]
Quick Trick: Scaling changes container count, not image or network [OK]
Common Mistakes:
  • Confusing scaling with updating image
  • Thinking scaling changes network settings
  • Assuming scaling deletes the service

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