A containerized service runs in private subnets and retrieves secrets from AWS Secrets Manager and configuration parameters from AWS Systems Manager Parameter Store on startup. A NAT Gateway is currently used only for these AWS API calls, and the security team wants to eliminate that recurring charge. Which two endpoints should be added? Select two.
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
Best answer
Create an interface VPC endpoint for AWS Secrets Manager.
Secrets Manager uses an interface endpoint in a private-subnet design. That keeps startup traffic off the NAT Gateway while still letting the service retrieve secrets privately over the AWS network.
Best answer
Create an interface VPC endpoint for AWS Systems Manager.
Systems Manager provides the API path used by Parameter Store. Adding the interface endpoint removes those configuration lookups from the NAT path and directly lowers recurring NAT charges.
Distractor review
Create a gateway VPC endpoint for Amazon S3 instead.
An S3 gateway endpoint is useful when workloads need private access to S3, but this startup path is for Secrets Manager and Parameter Store. Adding S3 endpoints would not remove the NAT charges described in the scenario.
Distractor review
Add an Internet Gateway and send the traffic through public subnets.
That would expose the service to the internet and does not reduce outbound traffic cost. The requirement is to keep the workload private and remove the need for NAT while still reaching AWS services.
Distractor review
Replace the NAT Gateway with a NAT instance.
A NAT instance can sometimes reduce cost, but it still requires an egress path and adds patching, scaling, and availability management. It does not eliminate the AWS API traffic cost the way the right VPC endpoints do.
Common exam trap
Common exam trap: usable hosts are not the same as total addresses
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Technical deep dive
How to think about this question
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
KKey Concepts to Remember
- CIDR notation defines the prefix length.
- Block size helps identify subnet boundaries.
- Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
- The required host count determines the smallest suitable subnet.
TExam Day Tips
- Write the block size before choosing the subnet.
- Check whether the question asks for hosts, subnets or a specific address range.
- Do not confuse /24, /25, /26 and /27 host counts.
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More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A team needs to distribute TCP traffic (not HTTP) across multiple services. The services must see the original client source IP for auditing. Which AWS load balancer is the best fit?
Question 2
A team wants to run containerized services with AWS-managed orchestration and autoscaling. They do NOT require Kubernetes compatibility. Which AWS service choice is most appropriate to meet these goals?
Question 3
A solutions architect is designing an S3 bucket for a IoT ingestion API. The objects must never be publicly accessible, even if a developer later adds an overly broad bucket policy. What should the architect configure? The design must avoid adding custom operational scripts.
Question 4
A solutions architect is designing an S3 bucket for a claims portal. The objects must never be publicly accessible, even if a developer later adds an overly broad bucket policy. What should the architect configure?
Question 5
A team wants to delegate IAM management to developers, but must ensure developers can never grant themselves permissions beyond a specific limit. Which AWS mechanism best matches this requirement?
Question 6
A solutions architect is designing an S3 bucket for a healthcare document service. The objects must never be publicly accessible, even if a developer later adds an overly broad bucket policy. What should the architect configure?
FAQ
Questions learners often ask
What does this SAA-C03 question test?
CIDR notation defines the prefix length.
What is the correct answer to this question?
The correct answer is: Create an interface VPC endpoint for AWS Secrets Manager. — Interface VPC endpoints for Secrets Manager and Systems Manager are the right fix because both services are accessed through AWS APIs from private subnets. Using those endpoints keeps the traffic on the AWS network and eliminates the need to send those calls through the NAT Gateway. That directly reduces recurring NAT charges while preserving private connectivity and security. Why others are wrong: An S3 endpoint does not address Secrets Manager or Parameter Store traffic. Moving the workloads to public subnets does not reduce the traffic cost and weakens isolation. A NAT instance still leaves you with egress traffic and operational overhead, so it does not remove the recurring cost in the cleanest way.
What should I do if I get this SAA-C03 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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