- A
Use IAM database authentication for the RDS instance and assign an IAM role to the EC2 instance.
IAM database authentication enables passwordless access using IAM roles, eliminating the need to store credentials.
- B
Store the database password in AWS Systems Manager Parameter Store as a SecureString.
Why wrong: While secure, it still requires the application to retrieve and use a password, whereas IAM authentication avoids passwords entirely.
- C
Store the database password in the application configuration file.
Why wrong: This approach is insecure as credentials are exposed in the file.
- D
Store the database password in AWS Secrets Manager and enable automatic rotation.
Why wrong: Secrets Manager is secure but still involves retrieving a password; IAM authentication is more secure as it eliminates static secrets.
Quick Answer
The answer is IAM database authentication combined with an IAM role assigned to the EC2 instance, as this eliminates the need to store any database credentials in application code. This works by allowing the EC2 instance to obtain a temporary, short-lived authentication token from AWS Identity and Access Management, which it then uses to connect to the RDS database—no password is ever stored or transmitted in plaintext. On the AWS Certified Database Specialty DBS-C01 exam, this scenario tests your understanding of credential management best practices, often contrasting IAM authentication against Secrets Manager or Parameter Store. A common trap is choosing Secrets Manager because it can rotate credentials, but the question specifically asks for the *most secure* method that avoids storing any credential at all, not just rotating it. Remember the key distinction: IAM database authentication provides passwordless access, while Secrets Manager still requires the application to retrieve a stored secret. Memory tip: “No password, no problem—IAM token for the win.”
DBS-C01 Database Security Practice Question
This DBS-C01 practice question tests your understanding of database security. 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 developer needs to allow an application running on EC2 to access an Amazon RDS database without storing database credentials in the application code. Which solution is the MOST secure?
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 IAM database authentication for the RDS instance and assign an IAM role to the EC2 instance.
Option D is correct because AWS Secrets Manager can rotate secrets automatically, and the application retrieves them via API, avoiding hardcoded credentials. Option A is wrong because storing credentials in the code is insecure. Option B is wrong because IAM database authentication for RDS MySQL/Aurora allows passwordless access using IAM roles, which is more secure than storing passwords. Option C is wrong because Parameter Store can store secrets but does not automatically rotate RDS credentials.
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 IAM database authentication for the RDS instance and assign an IAM role to the EC2 instance.
Why this is correct
IAM database authentication enables passwordless access using IAM roles, eliminating the need to store credentials.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Store the database password in AWS Systems Manager Parameter Store as a SecureString.
Why it's wrong here
While secure, it still requires the application to retrieve and use a password, whereas IAM authentication avoids passwords entirely.
- ✗
Store the database password in the application configuration file.
Why it's wrong here
This approach is insecure as credentials are exposed in the file.
- ✗
Store the database password in AWS Secrets Manager and enable automatic rotation.
Why it's wrong here
Secrets Manager is secure but still involves retrieving a password; IAM authentication is more secure as it eliminates static secrets.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Identify which DBS-C01 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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FAQ
Questions learners often ask
What does this DBS-C01 question test?
Database Security — This question tests Database Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use IAM database authentication for the RDS instance and assign an IAM role to the EC2 instance. — Option D is correct because AWS Secrets Manager can rotate secrets automatically, and the application retrieves them via API, avoiding hardcoded credentials. Option A is wrong because storing credentials in the code is insecure. Option B is wrong because IAM database authentication for RDS MySQL/Aurora allows passwordless access using IAM roles, which is more secure than storing passwords. Option C is wrong because Parameter Store can store secrets but does not automatically rotate RDS credentials.
What should I do if I get this DBS-C01 question wrong?
Identify which DBS-C01 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 20, 2026
This DBS-C01 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 DBS-C01 exam.
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