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CV0-004 Practice Question: A company has a cloud-based application that uses…
A company has a cloud-based application that uses an auto-scaling group across multiple Availability Zones (AZs). The application experiences periodic spikes in traffic. The auto-scaling policy uses a step scaling policy based on CPU utilization. The operations team notices that during a traffic spike, new instances are launched but take over five minutes to become healthy and begin serving traffic. During this time, existing instances are overloaded and some requests fail. The team wants to reduce the time it takes for new instances to handle traffic. Which action would be most effective?
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
✓
Use a pre-warmed, customized AMI with the application pre-installed and caches preloaded.
Using a pre-warmed AMI with the application stack already configured and caching enabled significantly reduces the time required for an instance to become healthy because it avoids the need to install dependencies and warm caches on each startup.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Increase the instance type to a larger size so each instance can handle more traffic.
Why it's wrong here
This reduces overload but does not reduce the time new instances take to become healthy.
- ✓
Use a pre-warmed, customized AMI with the application pre-installed and caches preloaded.
Why this is correct
A pre-warmed AMI reduces startup time by eliminating installation and cache warming steps.
- ✗
Reduce the cooldown period in the scaling policy to launch instances faster.
Why it's wrong here
Cooldown prevents rapid scaling; reducing it might cause oscillation but does not address boot time.
- ✗
Move all instances to a single AZ to avoid cross-AZ latency.
Why it's wrong here
This reduces fault tolerance and does not address instance startup time.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CV0-004 practice question is part of Courseiva's free CompTIA 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 CV0-004 exam.