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A user tries to right-size an EC2 instance but gets an error: "Instance type not supported in this AZ." What is the best fix?

medium📝 Debug Q14 of 15
AWS - Cost Optimization
A user tries to right-size an EC2 instance but gets an error: "Instance type not supported in this AZ." What is the best fix?
AChange the instance type to one supported in the availability zone
BIgnore the error and try again
CTerminate the instance immediately
DSwitch to a different AWS region without checking
Step-by-Step Solution
Solution:

  1. Step 1: Understand the error context

    The error means the chosen instance type is not available in the current availability zone.

  2. Step 2: Apply correct fix

    Selecting an instance type supported in the same availability zone resolves the error.

  3. Final Answer:

    Change the instance type to one supported in the availability zone -> Option A

  4. Quick Check:

    Unsupported instance type in AZ = pick supported type [OK]
Quick Trick: Pick instance types supported in your AZ [OK]
Common Mistakes:
  • Ignoring the error and retrying
  • Terminating instance without fixing
  • Switching regions without checking availability

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