- A
Store the application artifacts in Amazon ECR and use an ECS service with a single task definition.
Why wrong: Single task definition does not allow blue/green; you need two separate task definitions.
- B
Use a Network Load Balancer to route traffic to the ECS service.
Why wrong: NLB does not support blue/green deployment with CodeDeploy for ECS.
- C
Create two separate ECS task definitions for the blue and green environments.
Separate task definitions allow updating one while the other serves traffic.
- D
Use AWS CodeDeploy with a blue/green deployment configuration.
CodeDeploy automates traffic shifting between blue and green environments.
- E
Configure an Application Load Balancer with a target group for each task set.
ALB routes traffic to different target groups for blue and green.
Quick Answer
The answer is to configure an Application Load Balancer with a target group for each task set, use CodeDeploy to automate traffic shifting, and deploy multiple task definitions per environment. This combination works because blue/green deployment on ECS Fargate across multi-AZ relies on CodeDeploy orchestrating the shift between two distinct task sets, each registered with its own target group under the ALB, allowing traffic to be routed seamlessly between the blue and green environments while maintaining high availability across Availability Zones. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this scenario tests your understanding of how CodeDeploy integrates with ECS and ALB to achieve zero-downtime deployments, with a common trap being the assumption that an NLB supports this pattern—it does not, as NLB lacks the target group routing logic required for blue/green traffic shifting. Another trap is confusing ECR as a deployment mechanism; ECR stores container images, not deployment configurations. Remember the mnemonic “CAT” for the correct steps: CodeDeploy, ALB with target groups, and Task definitions per environment.
SAP-C02 Continuous Improvement for Existing Solutions Practice Question
This SAP-C02 practice question tests your understanding of continuous improvement for existing solutions. 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 company runs a critical application on Amazon ECS with Fargate launch type. The application needs to be highly available across multiple Availability Zones. The company wants to implement blue/green deployments to minimize downtime. Which THREE steps should the solutions architect take?
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 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
Create two separate ECS task definitions for the blue and green environments.
Options A, B, and D are correct. CodeDeploy with blue/green deployment automates traffic shifting. An Application Load Balancer with a target group per task set routes traffic. Multiple task definitions per environment allow updates without downtime. Option C is wrong because storing artifacts in ECR is for images, not deployment. Option E is wrong because an NLB does not support blue/green deployments with CodeDeploy for ECS.
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.
- ✗
Store the application artifacts in Amazon ECR and use an ECS service with a single task definition.
Why it's wrong here
Single task definition does not allow blue/green; you need two separate task definitions.
- ✗
Use a Network Load Balancer to route traffic to the ECS service.
Why it's wrong here
NLB does not support blue/green deployment with CodeDeploy for ECS.
- ✓
Create two separate ECS task definitions for the blue and green environments.
Why this is correct
Separate task definitions allow updating one while the other serves traffic.
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.
- ✓
Use AWS CodeDeploy with a blue/green deployment configuration.
Why this is correct
CodeDeploy automates traffic shifting between blue and green environments.
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.
- ✓
Configure an Application Load Balancer with a target group for each task set.
Why this is correct
ALB routes traffic to different target groups for blue and green.
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.
Common exam traps
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
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 SAP-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.
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Continuous Improvement for Existing Solutions — study guide chapter
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Continuous Improvement for Existing Solutions practice questions
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FAQ
Questions learners often ask
What does this SAP-C02 question test?
Continuous Improvement for Existing Solutions — This question tests Continuous Improvement for Existing Solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create two separate ECS task definitions for the blue and green environments. — Options A, B, and D are correct. CodeDeploy with blue/green deployment automates traffic shifting. An Application Load Balancer with a target group per task set routes traffic. Multiple task definitions per environment allow updates without downtime. Option C is wrong because storing artifacts in ECR is for images, not deployment. Option E is wrong because an NLB does not support blue/green deployments with CodeDeploy for ECS.
What should I do if I get this SAP-C02 question wrong?
Identify which SAP-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.
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.
About these practice questions
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Last reviewed: Jun 20, 2026
This SAP-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 SAP-C02 exam.
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