- A
Increase the Lambda function timeout and use a single database connection per function instance.
Why wrong: Lambda instances can scale to hundreds, each opening a connection, overwhelming the database.
- B
Use Amazon RDS Proxy to pool database connections, and configure the Lambda function to connect through the proxy.
RDS Proxy efficiently manages connection pooling and reduces load on the database.
- C
Use a singleton Lambda function with a reserved concurrency of 1 to ensure only one connection is used.
Why wrong: Reserved concurrency of 1 will cause processing delays and potential loss of events.
- D
Use a Lambda function that batches records from DynamoDB Streams and uses a single database connection per batch.
Why wrong: Each Lambda instance still opens a connection; with many instances, connections multiply.
SAP-C02 Design for New Solutions Practice Question
This SAP-C02 practice question tests your understanding of design for new solutions. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 serverless application that uses AWS Lambda to process events from Amazon DynamoDB Streams. The Lambda function updates an Amazon RDS for MySQL database. The company expects a high volume of updates and is concerned about the Lambda function causing too many connections to the database. How should the company design the solution to manage the database connection pool effectively?
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
Use Amazon RDS Proxy to pool database connections, and configure the Lambda function to connect through the proxy.
Option D is correct because Lambda functions should not maintain persistent connections across invocations; using RDS Proxy manages connection pooling. Option A is not possible in Lambda. Option B is not recommended because Lambda can scale rapidly. Option C does not solve the connection pooling issue.
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.
- ✗
Increase the Lambda function timeout and use a single database connection per function instance.
Why it's wrong here
Lambda instances can scale to hundreds, each opening a connection, overwhelming the database.
- ✓
Use Amazon RDS Proxy to pool database connections, and configure the Lambda function to connect through the proxy.
Why this is correct
RDS Proxy efficiently manages connection pooling and reduces load on the database.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use a singleton Lambda function with a reserved concurrency of 1 to ensure only one connection is used.
Why it's wrong here
Reserved concurrency of 1 will cause processing delays and potential loss of events.
- ✗
Use a Lambda function that batches records from DynamoDB Streams and uses a single database connection per batch.
Why it's wrong here
Each Lambda instance still opens a connection; with many instances, connections multiply.
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 startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
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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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: Use Amazon RDS Proxy to pool database connections, and configure the Lambda function to connect through the proxy. — Option D is correct because Lambda functions should not maintain persistent connections across invocations; using RDS Proxy manages connection pooling. Option A is not possible in Lambda. Option B is not recommended because Lambda can scale rapidly. Option C does not solve the connection pooling issue.
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
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.
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