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 DevOps team is using AWS CodeDeploy to deploy a web application. The deployment group consists of an Auto Scaling group with a minimum of 2 instances. They want to ensure high availability during the deployment. Which THREE of the following deployment configurations support zero-downtime deployments?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Deployment type: Rolling, with a batch size of 1 and a wait time between batches.
Option A is correct because a rolling deployment with a batch size of 1 and a wait time between batches updates one instance at a time, keeping the remaining instances in service. This ensures that the Auto Scaling group never drops below its minimum capacity, maintaining full availability throughout the deployment process.
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.
✓
Deployment type: Rolling, with a batch size of 1 and a wait time between batches.
Why this is correct
Rolling updates replace instances in batches, maintaining capacity.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✓
Deployment type: AllAtOnce, with Auto Scaling group minimum size set to double the desired capacity.
Why this is correct
AllAtOnce replaces all instances at once; with extra capacity, it's zero-downtime.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✓
Deployment type: Blue/green, with traffic shifting to the new environment after testing.
Why this is correct
Blue/green creates a new environment and switches traffic, ensuring zero-downtime.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Deployment type: Canary, with 10% traffic shift initially.
Why it's wrong here
Canary is for Lambda deployments, not EC2.
✗
Deployment type: In-place, with a batch size of 50%.
Why it's wrong here
In-place deployment stops and starts instances, causing downtime.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse canary traffic shifting (a blue/green feature) with a standalone deployment type, or assume that in-place deployments with any batch size guarantee zero downtime, ignoring the impact on Auto Scaling group minimum capacity.
Detailed technical explanation
How to think about this question
Under the hood, CodeDeploy’s rolling deployment uses the Auto Scaling group’s lifecycle hooks to register and deregister instances from the load balancer. The wait time between batches allows health checks to stabilize before proceeding, which is critical for zero-downtime in production environments where connection draining and warm-up periods matter. In a real-world scenario, a batch size of 1 with a wait time of 5 minutes ensures that if the updated instance fails health checks, the deployment can be rolled back without affecting the other instance.
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: Deployment type: Rolling, with a batch size of 1 and a wait time between batches. — Option A is correct because a rolling deployment with a batch size of 1 and a wait time between batches updates one instance at a time, keeping the remaining instances in service. This ensures that the Auto Scaling group never drops below its minimum capacity, maintaining full availability throughout the deployment process.
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.
Are there clue words in this question I should notice?
Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
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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