SAP-C02 Design for New Solutions Practice Question

Network Topology

An ALB is configured with a target group for HTTP:80. The health check returns a 302 redirect. What is the most likely cause of the unhealthy instances?

⚠ Common exam trap

Candidates often assume a redirect is harmless or that the ALB will follow it, but the ALB strictly evaluates the first response status code against the configured success codes, and a 302 is not a success by default.

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

✓

The application is redirecting health checks to another URL.

The ALB health check expects a 200 OK response from the target. A 302 redirect indicates the application is responding with a redirect (e.g., HTTP to HTTPS or to a login page) instead of a success status. This causes the health check to fail because the ALB does not follow redirects for health checks; it only accepts the configured success codes (default 200).

Answer analysis

Option-by-option breakdown

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

✗
The application is returning a 500 Internal Server Error.
Why it's wrong here
500 errors are different from 302.
✗
The application is taking too long to respond.
Why it's wrong here
Timeouts result in a different health check failure.
✗
The security group is blocking health check traffic.
Why it's wrong here
Blocked traffic would result in a different error, not 302.
✓
The application is redirecting health checks to another URL.
Why this is correct
A 302 redirect suggests the application is redirecting the health check request.

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SAP-C02 Design for New Solutions Practice Question

Why each option matters

Option-by-option breakdown

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