- 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.
Interface VPC Endpoints provide private IP connectivity from the VPC to the Secrets Manager service without routing through a NAT gateway or an Internet Gateway. The calls remain within AWS networking and still use standard TLS to the service endpoint.
- B
Create an S3 Gateway VPC endpoint and use it for Secrets Manager requests because both services use HTTPS.
Why wrong: Gateway VPC endpoints are service-specific (for S3 and a limited set of related services) and do not provide connectivity for Secrets Manager API calls. HTTPS does not make an S3 endpoint usable for other services.
- C
Assign a public IP address to the tasks so they can call Secrets Manager over the internet without NAT.
Why wrong: Using public IPs introduces public internet egress, which violates the requirement to keep Secrets Manager traffic within AWS private networking.
- D
Change the route table to send all 0.0.0.0/0 traffic directly to an Internet Gateway.
Why wrong: Routing general traffic to an Internet Gateway creates public internet egress, directly conflicting with the requirement to avoid public internet paths.
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.
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?
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.
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 (com.amazonaws.<region>.secretsmanager) and allow it via the endpoint security group; optionally enable private DNS.
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.
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 an Interface VPC Endpoint for Secrets Manager (com.amazonaws.<region>.secretsmanager) and allow it via the endpoint security group; optionally enable private DNS.
Why this is correct
Interface VPC Endpoints provide private IP connectivity from the VPC to the Secrets Manager service without routing through a NAT gateway or an Internet Gateway. The calls remain within AWS networking and still use standard TLS to the service 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 an S3 Gateway VPC endpoint and use it for Secrets Manager requests because both services use HTTPS.
- ✗
Assign a public IP address to the tasks so they can call Secrets Manager over the internet without NAT.
Why it's wrong here
Using public IPs introduces public internet egress, which violates the requirement to keep Secrets Manager traffic within AWS private networking.
- ✗
Change the route table to send all 0.0.0.0/0 traffic directly to an Internet Gateway.
Why it's wrong here
Routing general traffic to an Internet Gateway creates public internet egress, directly conflicting with the requirement to avoid public internet paths.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Gateway Endpoints (which only work for S3 and DynamoDB) with Interface Endpoints (which are needed for Secrets Manager and most other AWS services), leading them to incorrectly select option B.
Detailed technical explanation
How to think about this question
Interface VPC Endpoints use AWS PrivateLink to create an elastic network interface (ENI) with a private IP in the subnet, allowing traffic to AWS services via the AWS backbone. The endpoint security group must allow inbound HTTPS (TCP 443) from the microservice’s security group. Without private DNS enabled, you must manually modify the application’s endpoint URL to use the regional DNS name provided by the endpoint (e.g., vpce-xxx.secretsmanager.region.vpce.amazonaws.com).
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.
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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 (com.amazonaws.<region>.secretsmanager) and allow it via the endpoint security group; optionally enable private DNS. — 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.
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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