The correct answer is to refactor the application to communicate over HTTP and use Amazon API Gateway, as these two approaches directly address the need to modernize a legacy binary protocol to a REST API. Wrapping the proprietary TCP protocol with API Gateway and Lambda allows you to translate the binary stream into HTTP requests without rewriting the entire backend, enabling a gradual migration. Refactoring the application to natively speak HTTP is the ideal long-term solution, fully decoupling the client from the legacy transport. On the SAP-C02 exam, this scenario tests your understanding of protocol translation versus full modernization—a common trap is confusing messaging services like Amazon MQ or service mesh tools like App Mesh with RESTful API gateways. Remember the memory tip: “Wrap it with Gateway, then refactor for the long haul.”
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 is migrating a legacy application that uses a proprietary binary protocol for communication. The application communicates over TCP/IP. The company wants to modernize the communication layer to use a RESTful API. Which TWO approaches should the company consider?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Amazon API Gateway and AWS Lambda to create a REST API that translates requests to the legacy protocol.
Options A and C are correct. Option A: Wrapping the legacy protocol with a REST API using API Gateway and Lambda allows gradual modernization. Option C: Refactoring the application to use HTTP directly is the ideal long-term solution. Option B: Amazon MQ is for messaging, not REST. Option D: AWS App Mesh is for service mesh, not protocol translation. Option E: CloudFront is a CDN, not for protocol translation.
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.
Use Amazon API Gateway and AWS Lambda to create a REST API that translates requests to the legacy protocol.
Why this is correct
This allows the legacy protocol to be wrapped without modifying the backend.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use AWS App Mesh to convert the binary protocol to HTTP.
Why it's wrong here
App Mesh is for service mesh, not protocol conversion.
✓
Refactor the application to communicate over HTTP and use Amazon API Gateway.
Why this is correct
Refactoring to HTTP enables direct use of RESTful APIs.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use Amazon CloudFront to cache the RESTful endpoints.
Why it's wrong here
CloudFront is a CDN, not a protocol translator.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
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.
Accelerate Workload Migration and Modernization — This question tests Accelerate Workload Migration and Modernization — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use Amazon API Gateway and AWS Lambda to create a REST API that translates requests to the legacy protocol. — Options A and C are correct. Option A: Wrapping the legacy protocol with a REST API using API Gateway and Lambda allows gradual modernization. Option C: Refactoring the application to use HTTP directly is the ideal long-term solution. Option B: Amazon MQ is for messaging, not REST. Option D: AWS App Mesh is for service mesh, not protocol translation. Option E: CloudFront is a CDN, not for protocol translation.
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.
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Question Discussion
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