Question 1easymultiple choice
Full question →easymultiple choiceObjective-mapped
An S3 bucket uses a customer-managed KMS key as the default for SSE-KMS encryption. A service role will upload objects using s3:PutObject. Assuming the role already has permission to write to the bucket, which KMS permission is most directly required for the role to let S3 encrypt the object during upload?
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
kms:GenerateDataKey (and optionally kms:DescribeKey)
For SSE-KMS uploads, S3 uses KMS to generate a data key for encrypting the object. kms:GenerateDataKey is the direct permission required for that flow. kms:DescribeKey can be useful for validation or troubleshooting, but it is not the core cryptographic permission.
B
Distractor review
kms:Decrypt only
kms:Decrypt is primarily needed when reading objects back and KMS must decrypt the data key material. It is not the direct permission required to encrypt the object during upload.
C
Distractor review
kms:CreateAlias and kms:UpdateAlias only
Alias management controls how a key is referenced, but it does not allow S3 to generate data keys or encrypt object data.
D
Distractor review
kms:ScheduleKeyDeletion and kms:CancelKeyDeletion only
These are administrative lifecycle permissions for the KMS key and do not support SSE-KMS encryption during upload.
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: kms:GenerateDataKey (and optionally kms:DescribeKey) — For an S3 upload using SSE-KMS, the role must allow S3 to request a data key from KMS. The most direct and necessary KMS permission is kms:GenerateDataKey. That is the action S3 uses to obtain the data key material needed to encrypt the object. Additional permissions such as kms:DescribeKey may be useful in some workflows, but kms:Encrypt is not the key permission being tested here. kms:Decrypt is used for reading and decrypting data, not for the initial encrypt-on-upload path. Alias management permissions do not provide cryptographic capability. Key deletion permissions are administrative and unrelated to object encryption.
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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