- A
Step 1: Check network connectivity, Step 2: Check security groups, Step 3: Check credentials, Step 4: Test direct connection, Step 5: Check database logs
This order is correct because you should first verify network connectivity (e.g., VPC, subnets, routing) to ensure the application can reach the RDS endpoint. Next, check security groups and network ACLs to allow traffic on the correct port. Then verify credentials (username, password, IAM) to authenticate. After that, test the direct connection using a tool like telnet or psql to isolate the issue. Finally, check database logs for errors like failed logins or resource limits.
- B
Step 1: Check credentials, Step 2: Check security groups, Step 3: Check network connectivity, Step 4: Test direct connection, Step 5: Check database logs
Why wrong: This order is incorrect because starting with credentials assumes the database is reachable, but if network connectivity is broken, no authentication attempt will succeed. Security groups and network checks should be done before credentials to avoid misleading error messages.
- C
Step 1: Check security groups, Step 2: Check network connectivity, Step 3: Check credentials, Step 4: Check database logs, Step 5: Test direct connection
Why wrong: This order is incorrect because checking database logs before testing the direct connection is premature; logs are useful after confirming network and authentication issues are resolved. Also, security groups should be checked after verifying basic network connectivity, as they are a subset of network rules.
- D
Step 1: Check network connectivity, Step 2: Check credentials, Step 3: Check security groups, Step 4: Test direct connection, Step 5: Check database logs
Why wrong: This order is incorrect because checking credentials before security groups can lead to confusion: a failed login might be due to IP restrictions in security groups rather than invalid credentials. Security groups should be verified before testing credentials to ensure the connection is allowed.
DVA-C02 Troubleshooting and Optimization Practice Question
This DVA-C02 practice question tests your understanding of troubleshooting and optimization. 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.
Drag and drop the steps to troubleshoot an application that cannot connect to an RDS database in the correct order.
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
Step 1: Check network connectivity, Step 2: Check security groups, Step 3: Check credentials, Step 4: Test direct connection, Step 5: Check database logs
Start with network connectivity, then security groups, credentials, direct connection test, and finally database logs.
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.
- ✓
Step 1: Check network connectivity, Step 2: Check security groups, Step 3: Check credentials, Step 4: Test direct connection, Step 5: Check database logs
Why this is correct
This order is correct because you should first verify network connectivity (e.g., VPC, subnets, routing) to ensure the application can reach the RDS endpoint. Next, check security groups and network ACLs to allow traffic on the correct port. Then verify credentials (username, password, IAM) to authenticate. After that, test the direct connection using a tool like telnet or psql to isolate the issue. Finally, check database logs for errors like failed logins or resource limits.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Step 1: Check credentials, Step 2: Check security groups, Step 3: Check network connectivity, Step 4: Test direct connection, Step 5: Check database logs
Why it's wrong here
This order is incorrect because starting with credentials assumes the database is reachable, but if network connectivity is broken, no authentication attempt will succeed. Security groups and network checks should be done before credentials to avoid misleading error messages.
- ✗
Step 1: Check security groups, Step 2: Check network connectivity, Step 3: Check credentials, Step 4: Check database logs, Step 5: Test direct connection
Why it's wrong here
This order is incorrect because checking database logs before testing the direct connection is premature; logs are useful after confirming network and authentication issues are resolved. Also, security groups should be checked after verifying basic network connectivity, as they are a subset of network rules.
- ✗
Step 1: Check network connectivity, Step 2: Check credentials, Step 3: Check security groups, Step 4: Test direct connection, Step 5: Check database logs
Why it's wrong here
This order is incorrect because checking credentials before security groups can lead to confusion: a failed login might be due to IP restrictions in security groups rather than invalid credentials. Security groups should be verified before testing credentials to ensure the connection is allowed.
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.
Trap categories for this question
Similar concept trap
This order is incorrect because checking credentials before security groups can lead to confusion: a failed login might be due to IP restrictions in security groups rather than invalid credentials. Security groups should be verified before testing credentials to ensure the connection is allowed.
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 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 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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Troubleshooting and Optimization — study guide chapter
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FAQ
Questions learners often ask
What does this DVA-C02 question test?
Troubleshooting and Optimization — This question tests Troubleshooting and Optimization — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Step 1: Check network connectivity, Step 2: Check security groups, Step 3: Check credentials, Step 4: Test direct connection, Step 5: Check database logs — Start with network connectivity, then security groups, credentials, direct connection test, and finally database logs.
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.
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Last reviewed: Jun 11, 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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