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Question 307 of 1,730
Management and Operations →hardMultiple ChoiceObjective-mapped

Quick Answer

The correct answer is the combination that enables IAM database authentication on the RDS instance, creates a database user matching the IAM role ARN, grants the application server’s IAM role the rds_iam role, and configures the application to generate an authentication token using the IAM role’s credentials. This works because RDS PostgreSQL IAM database authentication with an IAM role requires a direct mapping between the IAM role’s ARN and a database user, replacing static passwords with short-lived tokens generated via AWS Signature Version 4. On the AWS Certified Database Specialty DBS-C01 exam, this scenario tests your understanding that the database user must be created with the exact IAM role ARN (not the user ARN) and that the rds_iam role must be granted to that database user—a common trap is confusing IAM users with roles or forgetting to enable IAM auth on the instance. Memory tip: think “Role ARN equals DB user name, token replaces password.”

DBS-C01 Management and Operations Practice Question

This DBS-C01 practice question tests your understanding of management and operations. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 has a production Amazon RDS for PostgreSQL Multi-AZ DB instance. The company's security team requires that all database connections use IAM database authentication. The company also needs to ensure that connections from a specific application server are allowed only if the server has a valid IAM role. Which combination of steps should the database administrator take to meet these requirements?

Question 1hardmultiple choice
Read the full NAT/PAT explanation →

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

✓

Enable IAM database authentication on the RDS instance. Create a database user that matches the IAM role ARN. Grant the application server's IAM role the rds_iam role. Configure the application to generate an authentication token using the IAM role's credentials.

IAM database authentication requires mapping IAM users/roles to database users and enforcing SSL. Steps: 1) Enable IAM DB authentication on the RDS instance. 2) Create a database user that matches the IAM role ARN. 3) Grant the application server's IAM role permission to connect. 4) Configure the application to use an authentication token. The correct answer is A because it includes enabling IAM auth, creating the database user, and configuring the application. Option B is wrong because it uses the IAM user ARN instead of the role ARN. Option C is wrong because it does not enable IAM auth. Option D is wrong because it uses a password.

Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • ✗

    Create a database user with a strong password. Enable IAM database authentication. Assign the application server an IAM policy that allows rds-db:connect. Configure the application to use the password.

    Why it's wrong here

    IAM database authentication does not use passwords; it uses authentication tokens.

  • ✗

    Enable IAM database authentication. Create a database user matching the IAM user ARN. Grant the application server's IAM user the rds_iam role. Configure the application to use an authentication token.

    Why it's wrong here

    The database user should match the IAM role ARN, not the IAM user ARN, because the application server assumes a role.

  • ✗

    Enable IAM database authentication. Create a database user that matches the IAM role ARN. Configure the application to use the database master username and password.

    Why it's wrong here

    Using a password bypasses IAM authentication.

  • ✓

    Enable IAM database authentication on the RDS instance. Create a database user that matches the IAM role ARN. Grant the application server's IAM role the rds_iam role. Configure the application to generate an authentication token using the IAM role's credentials.

    Why this is correct

    This ensures connections use IAM authentication and the application server's role is required.

    Related concept

    Static NAT maps one inside address to one outside address.

Common exam traps

Common exam trap: NAT rules depend on direction and matching traffic

NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.

Detailed technical explanation

How to think about this question

NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.

KKey Concepts to Remember

  • Static NAT maps one inside address to one outside address.
  • PAT allows many inside hosts to share one public address using ports.
  • Inside local and inside global describe the private and translated addresses.
  • NAT ACLs identify traffic for translation, not always security filtering.

TExam Day Tips

  • Identify inside and outside interfaces first.
  • Check whether the scenario needs static NAT, dynamic NAT or PAT.
  • Do not confuse NAT matching ACLs with normal packet-filtering intent.

Key takeaway

NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.

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.

Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DBS-C01 NAT questions on configuration and troubleshooting.

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FAQ

Questions learners often ask

What does this DBS-C01 question test?

Management and Operations — This question tests Management and Operations — Static NAT maps one inside address to one outside address..

What is the correct answer to this question?

The correct answer is: Enable IAM database authentication on the RDS instance. Create a database user that matches the IAM role ARN. Grant the application server's IAM role the rds_iam role. Configure the application to generate an authentication token using the IAM role's credentials. — IAM database authentication requires mapping IAM users/roles to database users and enforcing SSL. Steps: 1) Enable IAM DB authentication on the RDS instance. 2) Create a database user that matches the IAM role ARN. 3) Grant the application server's IAM role permission to connect. 4) Configure the application to use an authentication token. The correct answer is A because it includes enabling IAM auth, creating the database user, and configuring the application. Option B is wrong because it uses the IAM user ARN instead of the role ARN. Option C is wrong because it does not enable IAM auth. Option D is wrong because it uses a password.

What should I do if I get this DBS-C01 question wrong?

Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DBS-C01 NAT questions on configuration and troubleshooting.

What is the key concept behind this question?

Static NAT maps one inside address to one outside address.

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Last reviewed: Jun 20, 2026

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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.