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SOA-C02 · Question #526

A company's web application runs on Amazon EC2 instances in a single AWS Region. The infrastructure must be designed so the application remains available with no performance degradation in the event o

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Submitted by manish99· Mar 30, 2026Reliability and Business Continuity

Question

A company's web application runs on Amazon EC2 instances in a single AWS Region. The infrastructure must be designed so the application remains available with no performance degradation in the event of an Availability Zone (AZ) failure. To ensure optimal performance, the application must maintain a minimum of 12 instances at all times. Which solution will meet the requirements with the fewest running instances possible?

Options

  • A2 AZs with 6 instances in each AZ
  • B2 AZs with 12 instances in each AZ
  • C3 AZs with 4 instances in each AZ
  • D3 AZs with 6 instances in each AZ1

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Topics

#Availability Zone failure#high availability#EC2 capacity planning#fault tolerance
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