The correct answer is Amazon SQS for decoupling and Amazon Aurora MySQL for the database. This combination directly addresses the need to decouple microservices while maintaining MySQL compatibility, as SQS provides a fully managed message queue that allows services to communicate asynchronously without blocking, and Aurora offers a scalable, high-performance relational database that is wire-compatible with MySQL. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this scenario tests your understanding of service boundaries and the trade-offs between synchronous and asynchronous communication patterns; a common trap is selecting DynamoDB for its scalability without recognizing the requirement for MySQL compatibility, or choosing Kinesis which is optimized for real-time streaming rather than simple decoupling. Remember the memory tip: “Queue for decouple, Aurora for MySQL” — when you see a need to decouple microservices and a MySQL database requirement, immediately think SQS and Aurora, not DynamoDB or Kinesis.
SAP-C02 Practice Question: Accelerate Workload Migration and Modernization
This SAP-C02 practice question tests your understanding of accelerate workload migration and modernization. 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 wants to modernize a legacy monolithic application by decomposing it into microservices. The application handles HTTP requests and uses a MySQL database. The company needs to decouple the microservices and improve scalability. Which AWS services should be used?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Amazon SQS for decoupling and Amazon Aurora MySQL for data.
Option C is correct because SQS decouples microservices and Aurora is a scalable MySQL-compatible database. Option A is wrong because S3 is not a queue. Option B is wrong because DynamoDB is NoSQL. Option D is wrong because Kinesis is for real-time streaming, not decoupling.
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.
✓
Amazon SQS for decoupling and Amazon Aurora MySQL for data.
Why this is correct
SQS provides message queuing for decoupling; Aurora is MySQL-compatible and scalable.
Related concept
Static NAT maps one inside address to one outside address.
✗
Amazon S3 for decoupling and Amazon RDS for MySQL.
Why it's wrong here
S3 is object storage, not a message queue for decoupling.
✗
Amazon SQS for decoupling and Amazon DynamoDB for data.
Why it's wrong here
DynamoDB is NoSQL, not compatible with MySQL application logic.
✗
Amazon Kinesis Data Streams for decoupling and Amazon RDS for MySQL.
Why it's wrong here
Kinesis is for large-scale streaming, not standard request/response decoupling.
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
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
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.
Accelerate Workload Migration and Modernization — This question tests Accelerate Workload Migration and Modernization — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Amazon SQS for decoupling and Amazon Aurora MySQL for data. — Option C is correct because SQS decouples microservices and Aurora is a scalable MySQL-compatible database. Option A is wrong because S3 is not a queue. Option B is wrong because DynamoDB is NoSQL. Option D is wrong because Kinesis is for real-time streaming, not decoupling.
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.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
About these practice questions
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These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company is migrating a three-tier web application to AWS and wants to decouple the layers for scalability. Which THREE AWS services should they use?
medium
✓ A.Application Load Balancer (ALB)
✓ B.Amazon Simple Queue Service (SQS)
✓ C.Amazon RDS
D.Amazon CloudFront
E.Amazon ElastiCache
Why A: Options A, B, and C are correct. ALB for web tier, SQS for decoupling, and RDS for database. Option D (ElastiCache) is optional caching. Option E (CloudFront) is a CDN, not for decoupling.
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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.
Question Discussion
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