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Cost and Performance OptimizationmediumMultiple ChoiceObjective-mapped

SOA-C02 Cost and Performance Optimization Practice Question

Network Topology
$ aws ec2 describe-instancesquery 'Reservations[*].Instances[*].[InstanceIdoutput table+Refer to the exhibit.```| DescribeInstances |

An administrator runs the above command to list EC2 instances. The company wants to optimize costs. Which instance should the administrator consider terminating first?

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

i-0mnop3456 (t3.medium, stopped in us-east-1c)

The instance i-0mnop3456 is stopped but still incurs costs for EBS volumes and possibly Elastic IPs. Terminating it will eliminate those costs. The running instances are in use and may be necessary. The t3.medium instances are smaller and may be needed.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • i-0efgh5678 (t3.large, running in us-east-1b)

    Why it's wrong here

    This instance is running and may be needed.

  • i-0abcd1234 (t3.medium, running in us-east-1a)

    Why it's wrong here

    This instance is running and may be needed.

  • i-0mnop3456 (t3.medium, stopped in us-east-1c)

    Why this is correct

    Stopped instances still incur costs for attached resources.

  • i-0ijkl9012 (t3.xlarge, running in us-east-1a)

    Why it's wrong here

    This instance is running and may be needed.

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JA

Written by Johnson Ajibi, MSc IT Security

Senior Network & Security Engineer · founder of Courseiva

This SOA-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SOA-C02 exam.