- A
Configure Amazon RDS Proxy in front of the RDS instance and update the application to connect through the proxy.
RDS Proxy maintains a pool of connections to the database, reducing the number of open connections and preventing exhaustion.
- B
Enable Multi-AZ on the RDS instance to handle failover and reduce connection timeouts.
Why wrong: Multi-AZ provides failover but does not manage connection pooling.
- C
Migrate the database to Amazon Aurora and enable Auto Scaling for read replicas.
Why wrong: Auto Scaling adds read replicas but does not fix connection leaks.
- D
Increase the max_connections parameter in the RDS parameter group to allow more concurrent connections.
Why wrong: This only increases the limit but does not fix the connection leak; the application will still exhaust connections eventually.
DVA-C02 Development with AWS Services Practice Question
This DVA-C02 practice question tests your understanding of development with aws services. 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 runs a web application on Amazon EC2 instances behind an Application Load Balancer (ALB). The application uses an Amazon RDS MySQL database. Recently, the application started experiencing frequent database connection timeouts. The development team discovered that the application is not closing database connections properly, leading to exhausted database connections. The team wants a solution that does not require code changes. Which option should they choose?
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
Configure Amazon RDS Proxy in front of the RDS instance and update the application to connect through the proxy.
Option A is correct. RDS Proxy manages connection pooling and reduces the number of open connections to the database, thus preventing connection exhaustion without code changes. Option B is wrong because increasing the max_connections setting only postpones the problem and may cause resource contention. Option C is wrong because Multi-AZ is for high availability, not connection management. Option D is wrong because switching to Aurora with Auto Scaling does not address the connection leak issue and requires migration effort.
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.
- ✓
Configure Amazon RDS Proxy in front of the RDS instance and update the application to connect through the proxy.
Why this is correct
RDS Proxy maintains a pool of connections to the database, reducing the number of open connections and preventing exhaustion.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Enable Multi-AZ on the RDS instance to handle failover and reduce connection timeouts.
Why it's wrong here
Multi-AZ provides failover but does not manage connection pooling.
- ✗
Migrate the database to Amazon Aurora and enable Auto Scaling for read replicas.
Why it's wrong here
Auto Scaling adds read replicas but does not fix connection leaks.
- ✗
Increase the max_connections parameter in the RDS parameter group to allow more concurrent connections.
Why it's wrong here
This only increases the limit but does not fix the connection leak; the application will still exhaust connections eventually.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
What to study next
Got this wrong? Here's your next step.
Identify which DVA-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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Development with AWS Services — study guide chapter
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FAQ
Questions learners often ask
What does this DVA-C02 question test?
Development with AWS Services — This question tests Development with AWS Services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Configure Amazon RDS Proxy in front of the RDS instance and update the application to connect through the proxy. — Option A is correct. RDS Proxy manages connection pooling and reduces the number of open connections to the database, thus preventing connection exhaustion without code changes. Option B is wrong because increasing the max_connections setting only postpones the problem and may cause resource contention. Option C is wrong because Multi-AZ is for high availability, not connection management. Option D is wrong because switching to Aurora with Auto Scaling does not address the connection leak issue and requires migration effort.
What should I do if I get this DVA-C02 question wrong?
Identify which DVA-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 DVA-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 DVA-C02 exam.
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