The answer is to define a scaling trigger based on average CPU utilization, set the minimum and maximum number of instances, and choose the appropriate instance metric. This works because Elastic Beanstalk leverages Auto Scaling groups to dynamically adjust EC2 capacity; the scaling trigger monitors the average CPU utilization across all instances, and when it breaches the defined threshold, the group adds or removes instances within the boundaries you set. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this scenario tests your understanding of how Elastic Beanstalk integrates with Auto Scaling to handle variable traffic patterns, and a common trap is confusing a scheduled scaling action with a dynamic trigger—remember that CPU-based scaling is reactive, not time-based. A helpful memory tip is "CPU triggers, boundaries contain," meaning the trigger reacts to load while min/max values prevent runaway scaling.
DOP-C02 Configuration Management and IaC Practice Question
This DOP-C02 practice question tests your understanding of configuration management and iac. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 uses AWS Elastic Beanstalk to deploy a web application. The application experiences high traffic during business hours and low traffic at night. The company wants to configure automatic scaling based on CPU utilization. Which THREE steps are required to achieve this? (Select THREE.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Set the minimum and maximum number of instances for the auto scaling group.
Option B is correct because Elastic Beanstalk uses Auto Scaling groups to manage the EC2 instances for the application. Setting the minimum and maximum number of instances defines the boundaries within which the Auto Scaling group can scale, ensuring the application can handle high traffic during business hours and scale down during low traffic at night.
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.
✗
Create a CloudWatch alarm that triggers a scaling policy.
Why it's wrong here
Elastic Beanstalk can use CloudWatch alarms, but they are not strictly required; the trigger itself creates the alarm.
✓
Set the minimum and maximum number of instances for the auto scaling group.
Why this is correct
Defines the capacity range.
Related concept
Read the scenario before looking for a memorised answer.
✗
Configure the load balancer health check interval.
Why it's wrong here
Health check interval is for ELB, not autoscaling trigger.
✓
Set the scale-up and scale-down cooldown periods.
Why this is correct
Cooldown prevents rapid fluctuations.
Related concept
Read the scenario before looking for a memorised answer.
✓
Define a scaling trigger based on average CPU utilization.
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often think creating a CloudWatch alarm manually is required, but Elastic Beanstalk handles this automatically when you define the scaling trigger, making Option A an unnecessary step.
Detailed technical explanation
How to think about this question
Elastic Beanstalk abstracts the underlying Auto Scaling group configuration, but when you define a scaling trigger based on average CPU utilization, it automatically creates a CloudWatch alarm and associates it with a scaling policy. The cooldown periods (Option D) are essential to prevent rapid scaling oscillations by ensuring that the Auto Scaling group waits a specified amount of time before executing another scaling activity after a previous one completes.
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.
TExam Day Tips
→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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Configuration Management and IaC — This question tests Configuration Management and IaC — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Set the minimum and maximum number of instances for the auto scaling group. — Option B is correct because Elastic Beanstalk uses Auto Scaling groups to manage the EC2 instances for the application. Setting the minimum and maximum number of instances defines the boundaries within which the Auto Scaling group can scale, ensuring the application can handle high traffic during business hours and scale down during low traffic at night.
What should I do if I get this DOP-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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