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Question 990 of 1,040

Design Secure Architectures →easyMultiple ChoiceObjective-mapped

Quick Answer

The answer is to create an Interface VPC endpoint (AWS PrivateLink) for Secrets Manager. This is correct because AWS Secrets Manager operates as a regional API service over HTTPS, and Interface VPC endpoints attach an elastic network interface (ENI) with a private IP directly into your VPC subnet, allowing EC2 instances to reach the service without traversing the public internet or requiring a NAT gateway. On the SAA-C03 exam, this question tests your understanding of VPC endpoint types and their supported services—a common trap is confusing Gateway endpoints, which only support S3 and DynamoDB, with Interface endpoints that support most other AWS services like Secrets Manager, Systems Manager, and CloudWatch. Remember the memory tip: “Gateway for S3 and DDB, Interface for everything else API-based.”

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.

You have EC2 instances in private subnets with no NAT gateway. They must retrieve secrets from AWS Secrets Manager without sending traffic to the public internet. Which VPC endpoint type is the correct choice for connecting to AWS Secrets Manager?

Question 1easymultiple choice

Read the full NAT/PAT explanation →

A
Create a Gateway VPC endpoint for Secrets Manager.
Why wrong: Gateway endpoints are supported for specific services such as Amazon S3 and DynamoDB, not for Secrets Manager.
B
Create an Interface VPC endpoint (AWS PrivateLink) for Secrets Manager and associate security groups for the endpoint.
Secrets Manager is reached via an Interface VPC endpoint. Interface endpoints create private network interfaces in your subnets and route traffic to the AWS service over the AWS network, avoiding public internet egress.
C
Use a Transit Gateway attachment to route traffic to the public internet for Secrets Manager.
Why wrong: Transit Gateway does not eliminate the need for a private connection. Routing to the public internet violates the requirement to avoid public internet egress.
D
Deploy a NAT gateway and allow outbound HTTPS traffic to Secrets Manager.
Why wrong: NAT gateways send outbound traffic through the public internet pathway. The requirement is to avoid public internet egress, so NAT does not meet it.

Full breakdown with real-world context →

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 (AWS PrivateLink) for Secrets Manager and associate security groups for the endpoint.

AWS Secrets Manager is accessed via an API endpoint that uses HTTPS. Interface VPC endpoints (AWS PrivateLink) are the correct choice for connecting to services like Secrets Manager because they use elastic network interfaces (ENIs) with private IPs in your VPC, allowing traffic to stay within the AWS network. Gateway endpoints only support S3 and DynamoDB, not Secrets Manager.

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.

✗
Create a Gateway VPC endpoint for Secrets Manager.
Why it's wrong here
Gateway endpoints are supported for specific services such as Amazon S3 and DynamoDB, not for Secrets Manager.
✓
Create an Interface VPC endpoint (AWS PrivateLink) for Secrets Manager and associate security groups for the endpoint.
Why this is correct
Secrets Manager is reached via an Interface VPC endpoint. Interface endpoints create private network interfaces in your subnets and route traffic to the AWS service over the AWS network, avoiding public internet egress.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use a Transit Gateway attachment to route traffic to the public internet for Secrets Manager.
Why it's wrong here
Transit Gateway does not eliminate the need for a private connection. Routing to the public internet violates the requirement to avoid public internet egress.
✗
Deploy a NAT gateway and allow outbound HTTPS traffic to Secrets Manager.
Why it's wrong here
NAT gateways send outbound traffic through the public internet pathway. The requirement is to avoid public internet egress, so NAT does not meet it.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates often confuse Gateway endpoints (which are free and only for S3/DynamoDB) with Interface endpoints (which incur hourly charges but support many services like Secrets Manager, KMS, and CloudWatch).

Detailed technical explanation

How to think about this question

Interface VPC endpoints use AWS PrivateLink, which creates an elastic network interface (ENI) in your subnet with a private IP address. Traffic to Secrets Manager is routed via DNS resolution (using a private hosted zone) to this ENI, ensuring it never leaves the AWS network. This is critical for compliance scenarios (e.g., PCI-DSS) where data must not traverse the public internet.

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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.

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 (AWS PrivateLink) for Secrets Manager and associate security groups for the endpoint. — AWS Secrets Manager is accessed via an API endpoint that uses HTTPS. Interface VPC endpoints (AWS PrivateLink) are the correct choice for connecting to services like Secrets Manager because they use elastic network interfaces (ENIs) with private IPs in your VPC, allowing traffic to stay within the AWS network. Gateway endpoints only support S3 and DynamoDB, not Secrets Manager.

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.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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Same concept, more angles

1 more ways this is tested on SAA-C03

These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.

Variation 1. A microservice runs in private subnets with no NAT gateway. It must retrieve a secret from AWS Secrets Manager. Security requires that traffic to Secrets Manager stays within AWS’s private network (no public internet egress). The IAM role already grants secretsmanager:GetSecretValue for the needed secret. What is the best network setup to meet the requirement?

medium

✓ A.Create an Interface VPC Endpoint for Secrets Manager (com.amazonaws.<region>.secretsmanager) and allow it via the endpoint security group; optionally enable private DNS.
B.Create an S3 Gateway VPC endpoint and use it for Secrets Manager requests because both services use HTTPS.
C.Assign a public IP address to the tasks so they can call Secrets Manager over the internet without NAT.
D.Change the route table to send all 0.0.0.0/0 traffic directly to an Internet Gateway.

Why A: An Interface VPC Endpoint (AWS PrivateLink) for Secrets Manager allows the microservice to access the secret privately without traversing the public internet. Since the subnet has no NAT Gateway and no public IP, this is the only way to keep traffic within the AWS network. Enabling private DNS ensures the standard Secrets Manager endpoint resolves to the private IP of the endpoint, eliminating the need for route table changes.

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