Question 1mediummulti select
Full question →mediummulti selectObjective-mapped
A company stores sensitive PDFs in Amazon S3 and serves them through CloudFront. Users must access PDFs only through CloudFront, and direct S3 URL requests must fail. Which three changes should be implemented? Select three.
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
Best answer
Enable CloudFront Origin Access Control (OAC) for the S3 origin.
OAC lets CloudFront sign origin requests so the S3 bucket can trust only that distribution.
B
Best answer
Turn on S3 Block Public Access for the bucket and account.
Block Public Access prevents accidental public ACLs or policies from making the bucket directly reachable.
C
Best answer
Add an S3 bucket policy that allows requests only from the CloudFront distribution using aws:SourceArn.
A source-ARN condition restricts S3 access to the intended CloudFront distribution and blocks direct bucket access.
D
Distractor review
Enable S3 static website hosting on the bucket.
Website hosting makes the bucket publicly reachable through a website endpoint, which conflicts with the private-content requirement.
E
Distractor review
Make the object ACLs public so CloudFront can retrieve them.
Public ACLs would expose objects directly and undermine the requirement that direct S3 URL access must fail.
Common exam trap
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Technical deep dive
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
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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?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: Enable CloudFront Origin Access Control (OAC) for the S3 origin. — To keep PDFs private while delivering them through CloudFront, the bucket should only trust CloudFront-origin requests. Origin Access Control provides the signed origin access path, the bucket policy should restrict access to the specific CloudFront distribution using a source ARN condition, and Block Public Access prevents accidental public exposure through ACLs or policies. Those three controls together enforce private delivery without making the bucket public. S3 website hosting is intended for public website endpoints and does the opposite of what the scenario needs. Making ACLs public would expose the objects directly and bypass the CloudFront-only access model. The secure pattern is to keep the bucket private and let CloudFront be the only allowed origin caller.
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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