Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A finance application stores invoices in Amazon S3. Security requires that the data be encrypted with a key they control, and they want the ability to disable access quickly if the application is suspected of compromise. Developers do not want to manage encryption in application code. Which solution best meets these requirements?
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
Use SSE-S3 with the default Amazon-managed key for all uploads.
This provides encryption at rest, but the security team cannot directly control or quickly revoke the underlying key.
B
Best answer
Use SSE-KMS with a customer-managed AWS KMS key.
SSE-KMS with a customer-managed KMS key gives the security team explicit control over key policy, grants, auditing, and revocation. The application can upload objects normally while S3 handles encryption and decryption on the service side, so developers do not need custom cryptography code. If compromise is suspected, the key or grants can be disabled to block future access, which is exactly why a customer-managed key is preferable here.
C
Distractor review
Encrypt objects on the client side and store the encryption key in the same S3 bucket.
Client-side encryption can work, but storing the key with the data defeats the purpose and makes operational control much harder.
D
Distractor review
Use Amazon S3 replication to a second bucket in another region.
Replication improves availability and recovery options, but it does not by itself satisfy key-control or encryption-management requirements.
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: Use SSE-KMS with a customer-managed AWS KMS key. — SSE-KMS with a customer-managed KMS key is the best choice when the organization wants service-side encryption and direct control over the key lifecycle. It keeps encryption transparent to the application while allowing security to manage permissions, audit usage, and disable the key if needed. Compared with AWS-managed defaults, a customer-managed key provides stronger administrative control and a cleaner response path during incident handling. Why others are wrong: SSE-S3 encrypts data, but the organization does not directly control the key. Client-side encryption shifts key management into the application and is operationally heavier, especially if the key is stored with the data. S3 replication helps durability and disaster recovery, but it does not address encryption control or rapid revocation.
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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