- A
Check the Envoy proxy resource limits in the App Mesh configuration and increase the CPU and memory allocated to the sidecar proxies.
Under-provisioned sidecars can cause latency and timeouts.
- B
Use AWS Cloud Map for service discovery instead of App Mesh.
Why wrong: Cloud Map does not address latency caused by sidecar proxies.
- C
Replace the service mesh with VPC peering and security groups, and use direct HTTP calls.
Why wrong: Removes mTLS and observability benefits.
- D
Convert the microservices to AWS Lambda functions and use API Gateway.
Why wrong: Major redesign; may not reduce latency.
Question 1,049 of 1,746
SAP-C02 Design for New Solutions Practice Question
This SAP-C02 practice question tests your understanding of design for new solutions. 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 designing a new microservices platform on AWS. The platform consists of 50 microservices, each running in its own Amazon ECS service on AWS Fargate. The services communicate via REST APIs. The company wants to implement a service mesh to handle traffic routing, observability, and security (mTLS). They also need to meet compliance requirements that all traffic between services must be encrypted and logged. The solution must be fully managed and reduce operational overhead. After implementing the service mesh, the operations team notices that latency between services has increased by 20%, and some services are experiencing connection timeouts. The team has enabled mTLS and distributed tracing. Which course of action should the team take to diagnose and resolve the latency issues?
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
✓
Check the Envoy proxy resource limits in the App Mesh configuration and increase the CPU and memory allocated to the sidecar proxies.
Option A is correct because AWS App Mesh can inject Envoy sidecar proxies, and increasing the proxy resources can reduce latency caused by insufficient CPU or memory. Option B (using AWS Cloud Map for service discovery) does not address the latency issues; Cloud Map is a service discovery mechanism, not a replacement for the service mesh. Option C (replacing the service mesh with VPC peering and security groups) removes the service mesh benefits like mTLS and observability, and is not a direct solution to proxy resource constraints. Option D (converting to Lambda and API Gateway) is a major redesign and not necessary for diagnosing the latency problem.
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.
- ✓
Check the Envoy proxy resource limits in the App Mesh configuration and increase the CPU and memory allocated to the sidecar proxies.
Why this is correct
Under-provisioned sidecars can cause latency and timeouts.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use AWS Cloud Map for service discovery instead of App Mesh.
Why it's wrong here
Cloud Map does not address latency caused by sidecar proxies.
- ✗
Replace the service mesh with VPC peering and security groups, and use direct HTTP calls.
Why it's wrong here
Removes mTLS and observability benefits.
- ✗
Convert the microservices to AWS Lambda functions and use API Gateway.
Why it's wrong here
Major redesign; may not reduce latency.
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
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
Visual reference
Quick reference
Cloud Service Model Comparison
| Model | You Manage | Provider Manages | Examples |
|---|---|---|---|
| IaaS | OS, runtime, apps, data | Hardware, hypervisor, networking | EC2, Azure VMs, GCP Compute Engine |
| PaaS | Apps and data | OS, runtime, middleware, hardware | Elastic Beanstalk, Azure App Service |
| SaaS | Data and settings only | Everything else | Microsoft 365, Salesforce, Workday |
| FaaS / Serverless | Function code only | Infra, scaling, runtime | Lambda, Azure Functions, Cloud Run |
| CaaS | Containers and apps | Kubernetes, OS, hardware | EKS, AKS, GKE |
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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Design for New Solutions — study guide chapter
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Design for New Solutions practice questions
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FAQ
Questions learners often ask
What does this SAP-C02 question test?
Design for New Solutions — This question tests Design for New Solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Check the Envoy proxy resource limits in the App Mesh configuration and increase the CPU and memory allocated to the sidecar proxies. — Option A is correct because AWS App Mesh can inject Envoy sidecar proxies, and increasing the proxy resources can reduce latency caused by insufficient CPU or memory. Option B (using AWS Cloud Map for service discovery) does not address the latency issues; Cloud Map is a service discovery mechanism, not a replacement for the service mesh. Option C (replacing the service mesh with VPC peering and security groups) removes the service mesh benefits like mTLS and observability, and is not a direct solution to proxy resource constraints. Option D (converting to Lambda and API Gateway) is a major redesign and not necessary for diagnosing the latency problem.
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.
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
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