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SAA-C03 · Question #115

A company uses an Amazon EC2 Auto Scaling group to host an API. The EC2 instances are in a target group that is associated with an Application Load Balancer (ALB). The company stores data in an Amazon

The correct answer is C. Create a listener rule on the ALB to return a maintenance response when the path on a request. Creating a listener rule on theApplication Load Balancer (ALB)to return a maintenance response during the maintenance window is the most straightforward solution with the least operational overhead. The rule can be configured to match all incoming requests and return a custom res

Submitted by hassan_iq· Mar 4, 2026Design Resilient Architectures

Question

A company uses an Amazon EC2 Auto Scaling group to host an API. The EC2 instances are in a target group that is associated with an Application Load Balancer (ALB). The company stores data in an Amazon Aurora PostgreSQL database. The API has a weekly maintenance window. The company must ensure that the API returns a static maintenance response during the weekly maintenance window. Which solution will meet this requirement with the LEAST operational overhead?

Options

  • ACreate a table in Aurora PostgreSQL that has fields to contain keys and values. Create a key for
  • BCreate an Amazon Simple Queue Service (Amazon SQS) queue. Subscribe the EC2 instances to
  • CCreate a listener rule on the ALB to return a maintenance response when the path on a request
  • DCreate an Amazon Simple Notification Service (Amazon SNS) topic Subscribe the EC2 instances

How the community answered

(38 responses)
  • A
    16% (6)
  • B
    3% (1)
  • C
    74% (28)
  • D
    8% (3)

Explanation

Creating a listener rule on theApplication Load Balancer (ALB)to return a maintenance response during the maintenance window is the most straightforward solution with the least operational overhead. The rule can be configured to match all incoming requests and return a custom response, and it can be easily removed once maintenance is complete. Option A (Aurora table flag): This adds unnecessary complexity for a temporary maintenance Option B and D (SQS or SNS): These options introduce more components than needed for a simple maintenance message.

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