- A
Amazon Route 53 private hosted zones with health checks
Why wrong: Possible but requires manual DNS management.
- B
AWS Cloud Map
Managed service discovery for microservices.
- C
VPC peering connections between services
Why wrong: For VPC connectivity, not service discovery.
- D
Application Load Balancer with path-based routing
Why wrong: For traffic routing, not service discovery.
Question 370 of 1,746
SAP-C02 Design for New Solutions Practice Question
This SAP-C02 practice question tests your understanding of design for new solutions. 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 is designing a new microservices application using Amazon ECS with Fargate. The services need to communicate securely within the VPC. Which approach should be used for service discovery?
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
✓
AWS Cloud Map
AWS Cloud Map is the correct choice because it provides a fully managed service discovery solution that integrates natively with Amazon ECS and Fargate. It allows microservices to register themselves with DNS-based or API-based service endpoints, enabling dynamic, secure communication within the VPC without requiring manual IP management or external DNS configuration.
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.
- ✗
Amazon Route 53 private hosted zones with health checks
Why it's wrong here
Possible but requires manual DNS management.
- ✓
AWS Cloud Map
Why this is correct
Managed service discovery for microservices.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
VPC peering connections between services
Why it's wrong here
For VPC connectivity, not service discovery.
- ✗
Application Load Balancer with path-based routing
Why it's wrong here
For traffic routing, not service discovery.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse DNS-based resolution (Route 53 private hosted zones) with dynamic service discovery (AWS Cloud Map), assuming that static DNS records with health checks are sufficient for microservices that scale and change IPs frequently.
Detailed technical explanation
How to think about this question
AWS Cloud Map uses a combination of DNS (A/AAAA/SRV records) and health checks to register and discover service instances. When a Fargate task starts, it can automatically register itself with Cloud Map via the ECS service discovery integration, which creates a DNS record in a private hosted zone. This allows other services to resolve the service name to the task's private IP address, supporting both HTTP and non-HTTP protocols. In a real-world scenario, if a service scales up or down, Cloud Map updates the DNS records within seconds, ensuring that clients always reach healthy instances.
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
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.
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.
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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: AWS Cloud Map — AWS Cloud Map is the correct choice because it provides a fully managed service discovery solution that integrates natively with Amazon ECS and Fargate. It allows microservices to register themselves with DNS-based or API-based service endpoints, enabling dynamic, secure communication within the VPC without requiring manual IP management or external DNS configuration.
What should I do if I get this SAP-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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Last reviewed: Jul 4, 2026
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