SAP-C02 Continuous Improvement for Existing Solutions Practice Question
A company uses an Application Load Balancer (ALB) to distribute traffic to an Auto Scaling group of EC2 instances. The operations team notices that the ALB is returning a high number of 504 errors during peak hours. Which configuration change is MOST likely to reduce the 504 errors?
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
✓
Increase the idle timeout setting on the ALB.
Increasing the idle timeout setting on the ALB can help prevent premature connection closures that cause 504 errors. Option A is wrong because increasing the deregistration delay only affects instance draining, not idle timeouts. Option C is wrong because enabling cross-zone load balancing does not address timeout issues. Option D is wrong because increasing the health check interval does not affect idle timeouts.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enable cross-zone load balancing on the ALB.
Why it's wrong here
Cross-zone balancing distributes traffic evenly but does not prevent 504s.
- ✓
Increase the idle timeout setting on the ALB.
Why this is correct
Higher idle timeout allows longer-lived connections to complete without timing out.
- ✗
Increase the health check interval for the target group.
Why it's wrong here
Health check interval affects instance health detection, not timeout errors.
- ✗
Increase the deregistration delay on the target group.
Why it's wrong here
Deregistration delay affects connection draining, not idle timeout.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This SAP-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 SAP-C02 exam.