DVA-C02 Development with AWS Services Practice Question
This DVA-C02 practice question tests your understanding of development with aws services. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 company runs a Node.js application on AWS Elastic Beanstalk. The application experiences high latency during peak hours. The developer suspects that the environment's EC2 instances are under-provisioned. Which configuration change would MOST effectively address the latency issue with minimal cost increase?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable Auto Scaling and configure scaling triggers based on CPU utilization.
Option D is correct because enabling Auto Scaling and adjusting scaling triggers allows the environment to add instances during peak hours and remove them during low traffic, balancing performance and cost. Option A is wrong because increasing instance size may be more expensive and less elastic. Option B is wrong because reducing the number of instances would worsen latency. Option C is wrong because using a load balancer alone does not change instance provisioning.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Place the environment behind an Application Load Balancer.
Why it's wrong here
A load balancer distributes traffic but does not add more instances.
✓
Enable Auto Scaling and configure scaling triggers based on CPU utilization.
Why this is correct
Auto Scaling adds instances during high CPU usage and removes them when idle, optimizing cost and performance.
Related concept
Read the scenario before looking for a memorised answer.
✗
Change the instance type to a larger size in the environment configuration.
Why it's wrong here
Larger instances may be more expensive and not as cost-effective as scaling out.
✗
Decrease the minimum number of instances in the Auto Scaling group.
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
What to study next
Got this wrong? Here's your next step.
Identify which DVA-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Development with AWS Services — This question tests Development with AWS Services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable Auto Scaling and configure scaling triggers based on CPU utilization. — Option D is correct because enabling Auto Scaling and adjusting scaling triggers allows the environment to add instances during peak hours and remove them during low traffic, balancing performance and cost. Option A is wrong because increasing instance size may be more expensive and less elastic. Option B is wrong because reducing the number of instances would worsen latency. Option C is wrong because using a load balancer alone does not change instance provisioning.
What should I do if I get this DVA-C02 question wrong?
Identify which DVA-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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This DVA-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 DVA-C02 exam.
Question Discussion
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