The correct choice is Amazon ECS with Fargate launch type, defining services across multiple Availability Zones. This design meets strict latency requirements by allowing containers to run in a serverless fashion across AZs, automatically distributing traffic to the nearest healthy instance for low-latency responses, while Fargate eliminates the need to manage underlying EC2 instances or patch operating systems, drastically reducing operational overhead. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this scenario tests your ability to balance performance, high availability, and operational simplicity—a common trap is choosing Lambda for its serverless appeal, but Lambda’s 15-minute execution limit and cold starts make it unsuitable for long-running microservices. Another pitfall is selecting EKS, which adds Kubernetes management complexity without benefit here. Remember the memory tip: “Fargate for fast, fault-tolerant, and fuss-free microservices across AZs.”
SAP-C02 Practice Question: Design Solutions for Organizational Complexity
This SAP-C02 practice question tests your understanding of design solutions for organizational complexity. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 is migrating a legacy monolithic application to a microservices architecture on AWS. The application has strict latency requirements and must be deployed across multiple Availability Zones. Which design strategy BEST meets these requirements while minimizing operational overhead?
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.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Amazon ECS with Fargate launch type, defining services across multiple AZs.
Option D is correct because Amazon ECS with Fargate provides serverless container orchestration, reducing operational overhead, and can be deployed across AZs for high availability and low latency. Option A is wrong because AWS Lambda has execution time limits and may not suit long-running services. Option B is wrong because EC2 requires patching and capacity management. Option C is wrong because EKS adds Kubernetes complexity.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Use Amazon ECS with Fargate launch type, defining services across multiple AZs.
Why this is correct
Fargate manages containers serverlessly, reducing overhead and enabling multi-AZ deployment.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
Use AWS Lambda functions for each microservice, triggered by API Gateway.
Why it's wrong here
Lambda may not fit long-running or latency-sensitive services.
✗
Deploy each microservice on Amazon EC2 instances in an Auto Scaling group across AZs.
Why it's wrong here
EC2 increases operational overhead for patching and scaling.
✗
Use Amazon EKS with worker nodes on EC2, and deploy microservices as Kubernetes pods.
Why it's wrong here
EKS adds management overhead for the control plane.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SAP-C02 NAT questions on configuration and troubleshooting.
Design Solutions for Organizational Complexity — This question tests Design Solutions for Organizational Complexity — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Use Amazon ECS with Fargate launch type, defining services across multiple AZs. — Option D is correct because Amazon ECS with Fargate provides serverless container orchestration, reducing operational overhead, and can be deployed across AZs for high availability and low latency. Option A is wrong because AWS Lambda has execution time limits and may not suit long-running services. Option B is wrong because EC2 requires patching and capacity management. Option C is wrong because EKS adds Kubernetes complexity.
What should I do if I get this SAP-C02 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SAP-C02 NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
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.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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