Quick Answer
The correct answer is to configure an auto scaling group with a load balancer. This design best practice enables horizontal scaling by automatically adding or removing VM instances based on predefined metrics like CPU utilization or request count, ensuring the web application can scale out during traffic spikes without manual intervention. On the CompTIA Cloud+ CV0-004 exam, this concept tests your understanding of cloud elasticity and how load balancers distribute incoming traffic across a dynamic pool of instances, preventing any single resource from becoming a bottleneck. A common trap is confusing vertical scaling (resizing a single instance) with horizontal scaling; remember that auto-scaling groups are specifically designed for adding or removing entire instances, not for changing instance sizes. A useful memory tip is to think of the load balancer as the traffic cop and the auto scaling group as the fleet manager—together, they keep the application responsive under variable workloads.
This CV0-004 practice question tests your understanding of operations and support. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A cloud engineer needs to ensure that a web application can scale out automatically during traffic spikes. Which design best practice should be implemented?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Deploy a larger instance size.
Why wrong: Vertical scaling is not automatic and has limits.
Use a single powerful VM with more vCPUs.
Why wrong: This is vertical scaling, not automated.
Manually provision additional VMs during peak times.
Why wrong: Manual scaling is not automated.
Configure an auto scaling group with a load balancer.
Auto scaling automatically adjusts capacity.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Configure an auto scaling group with a load balancer.
Option D is correct because an auto scaling group combined with a load balancer automatically adds or removes VM instances based on predefined metrics (e.g., CPU utilization, request count), ensuring the web application scales out horizontally during traffic spikes without manual intervention. This aligns with cloud elasticity best practices for handling variable workloads.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Deploy a larger instance size.
Why it's wrong here
Vertical scaling is not automatic and has limits.
Use a single powerful VM with more vCPUs.
Why it's wrong here
This is vertical scaling, not automated.
Manually provision additional VMs during peak times.
Why it's wrong here
Manual scaling is not automated.
Configure an auto scaling group with a load balancer.
Why this is correct
Auto scaling automatically adjusts capacity.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
CompTIA often tests the distinction between vertical scaling (scaling up) and horizontal scaling (scaling out), where candidates mistakenly choose a larger instance size or a single powerful VM because they think 'more resources' is the solution, ignoring the need for automatic, elastic scaling and fault tolerance.
Detailed technical explanation
Auto scaling groups work by defining launch templates or configurations, scaling policies (e.g., target tracking, step scaling), and health checks that integrate with a load balancer (e.g., Application Load Balancer) to distribute incoming traffic across healthy instances. Under the hood, the auto scaling service monitors CloudWatch metrics and triggers scale-out or scale-in events via lifecycle hooks, which can also coordinate with configuration management tools for instance initialization. A real-world scenario involves a flash sale where request rates surge from 1,000 to 50,000 per minute; an auto scaling group with a load balancer can spin up dozens of instances in minutes, while vertical scaling would fail due to instance size limits.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the CV0-004 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Operations and Support — study guide chapter
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FAQ
Operations and Support — This question tests Operations and Support — Read the scenario before looking for a memorised answer..
The correct answer is: Configure an auto scaling group with a load balancer. — Option D is correct because an auto scaling group combined with a load balancer automatically adds or removes VM instances based on predefined metrics (e.g., CPU utilization, request count), ensuring the web application scales out horizontally during traffic spikes without manual intervention. This aligns with cloud elasticity best practices for handling variable workloads.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 2026
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.
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