SAP-C02 Continuous Improvement for Existing Solutions Practice Question
A company runs a stateless web application on EC2 instances behind an Application Load Balancer (ALB). During peak traffic, some instances become unhealthy and are replaced by Auto Scaling, but users experience errors. What is the MOST likely cause?
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 health check target path or port is misconfigured.
If the health check target path or port is misconfigured, healthy instances may fail health checks and be replaced, causing errors during peak traffic. Option A is incorrect because burstable performance instances are not directly related to health check failures; health checks depend on the configured endpoint. Option B is incorrect because a small minimum size affects capacity, not the accuracy of health checks. Option D is incorrect because a longer health check interval delays detection of unhealthy instances but does not cause healthy instances to be mistakenly replaced.
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 EC2 instances are of a burstable performance type.
Why it's wrong here
Burstable instances may affect performance but not cause health check failures directly.
- ✗
The Auto Scaling group's minimum size is too small.
Why it's wrong here
A small minimum size may cause capacity issues but not directly cause health check failures.
- ✓
The health check target path or port is misconfigured.
Why this is correct
Misconfigured health checks can mark healthy instances as unhealthy, causing them to be replaced and disrupting traffic.
- ✗
The health check interval is too long.
Why it's wrong here
A longer interval would reduce the frequency of health checks, not cause errors.
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JA
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.