Question 1hardmultiple choice
Full question →hardmultiple choiceObjective-mapped
An EC2 instance in a private subnet must access an S3 bucket that contains regulated exports for a financial reporting platform. The security team requires access to be allowed only when traffic comes through a specific VPC endpoint. What should the architect add to the bucket policy? The design must avoid adding custom operational scripts.
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.
A
Distractor review
A security group rule that allows HTTPS to S3
Security groups do not attach to S3 buckets and cannot enforce S3 bucket access.
B
Distractor review
A condition that matches aws:RequestedRegion to the bucket Region
RequestedRegion limits API calls by Region but does not prove traffic used the endpoint.
C
Distractor review
A deny statement for all IAM users except the EC2 role
This controls identity but does not enforce the network path through the endpoint.
D
Best answer
A condition that matches aws:sourceVpce to the endpoint ID
The aws:sourceVpce condition restricts S3 access to requests that arrive through the specified VPC endpoint.
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: A condition that matches aws:sourceVpce to the endpoint ID — For S3 access through a VPC endpoint, the bucket policy can enforce the endpoint path with aws:sourceVpce.
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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