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Design Secure Architectures →hardMultiple ChoiceObjective-mapped

SAA-C03 Design Secure Architectures Practice Question

This SAA-C03 practice question tests your understanding of design secure architectures. 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.

Exhibit

{
  "subnet_route_table": [
    {"destination": "10.0.0.0/16", "target": "local"},
    {"destination": "0.0.0.0/0", "target": "-"}
  ],
  "dns_test": {
    "command": "nslookup secretsmanager.us-east-1.amazonaws.com",
    "result": "Name: secretsmanager.us-east-1.amazonaws.com\nAddress: 54.239.28.82"
  },
  "application_log": [
    "2026-04-18T12:10:04Z ERROR GetSecretValue timed out after 3000 ms",
    "2026-04-18T12:10:04Z INFO calling https://secretsmanager.us-east-1.amazonaws.com"
  ]
}

Based on the exhibit, an application runs in private subnets without a NAT gateway and must retrieve a secret from AWS Secrets Manager. Security requires the traffic to stay on the AWS network and not traverse the public internet. What is the best solution?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

  • Clue: "best"

    Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.

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

Exhibit

{
  "subnet_route_table": [
    {"destination": "10.0.0.0/16", "target": "local"},
    {"destination": "0.0.0.0/0", "target": "-"}
  ],
  "dns_test": {
    "command": "nslookup secretsmanager.us-east-1.amazonaws.com",
    "result": "Name: secretsmanager.us-east-1.amazonaws.com\nAddress: 54.239.28.82"
  },
  "application_log": [
    "2026-04-18T12:10:04Z ERROR GetSecretValue timed out after 3000 ms",
    "2026-04-18T12:10:04Z INFO calling https://secretsmanager.us-east-1.amazonaws.com"
  ]
}

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

✓

Create an interface VPC endpoint for Secrets Manager and enable private DNS for the endpoint.

Option B is correct because an interface VPC endpoint for Secrets Manager allows the application in the private subnet to securely access Secrets Manager over the AWS network using private IP addresses, without needing a NAT gateway or internet gateway. Enabling private DNS ensures that the default Secrets Manager DNS name resolves to the endpoint's private IP addresses, keeping all traffic within the AWS backbone and satisfying the security requirement.

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.

  • ✗

    Add a NAT gateway to the private subnet route table and keep using the public Secrets Manager endpoint.

    Why it's wrong here

    This restores connectivity, but it sends traffic through the internet path and adds NAT cost.

  • ✓

    Create an interface VPC endpoint for Secrets Manager and enable private DNS for the endpoint.

    Why this is correct

    An interface endpoint keeps API calls on the AWS network and private DNS makes the standard service name resolve to the private endpoint.

    Clue confirmation

    The clue word "best" in the question point toward this answer.

    Related concept

    Read the scenario before looking for a memorised answer.

  • ✗

    Create a gateway VPC endpoint for Secrets Manager and point the route table to it.

    Why it's wrong here

    Gateway endpoints are not used for Secrets Manager; they are used for specific services like S3 and DynamoDB.

  • ✗

    Use VPC peering to connect the application subnet to another VPC that already has internet access.

    Why it's wrong here

    VPC peering does not provide internet egress or a private AWS service endpoint by itself.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates confuse gateway VPC endpoints (which work only for S3 and DynamoDB) with interface VPC endpoints (which are used for most other AWS services including Secrets Manager), leading them to incorrectly select option C.

Detailed technical explanation

How to think about this question

Interface VPC endpoints use AWS PrivateLink, which creates an elastic network interface (ENI) in the subnet with a private IP address, and traffic is routed through the AWS network without leaving it. The private DNS option automatically updates the public hosted zone for Secrets Manager (secretsmanager.<region>.amazonaws.com) to resolve to the endpoint's private IPs, ensuring seamless integration without modifying application code. This approach also supports security groups for fine-grained access control, unlike gateway endpoints which rely on route tables and bucket policies.

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.

TExam Day Tips

  • 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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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FAQ

Questions learners often ask

What does this SAA-C03 question test?

Design Secure Architectures — This question tests Design Secure Architectures — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: Create an interface VPC endpoint for Secrets Manager and enable private DNS for the endpoint. — Option B is correct because an interface VPC endpoint for Secrets Manager allows the application in the private subnet to securely access Secrets Manager over the AWS network using private IP addresses, without needing a NAT gateway or internet gateway. Enabling private DNS ensures that the default Secrets Manager DNS name resolves to the endpoint's private IP addresses, keeping all traffic within the AWS backbone and satisfying the security requirement.

What should I do if I get this SAA-C03 question wrong?

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

Are there clue words in this question I should notice?

Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.

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

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This SAA-C03 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 SAA-C03 exam.