This PAS-C01 practice question tests your understanding of technology. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
The exhibit shows an IAM policy for an SAP backup process that uploads backups to S3. An administrator wants to ensure that all uploads are encrypted using SSE-S3. What does this policy enforce?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Any PutObject request that does not include the encryption header will be denied.
The policy uses a `Deny` effect with a `StringNotEquals` condition on the `s3:x-amz-server-side-encryption` header, requiring it to be `AES256`. This enforces that any `PutObject` request must include the `x-amz-server-side-encryption: AES256` header; otherwise, the request is denied. Option C correctly states that requests without the encryption header will be denied.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
The backup process must encrypt the files before uploading them.
Why it's wrong here
Client-side encryption is not required; server-side encryption is enforced.
✗
The backup process must use AWS KMS to encrypt the objects.
Why it's wrong here
The condition specifies AES256, which is SSE-S3, not KMS.
✓
Any PutObject request that does not include the encryption header will be denied.
Why this is correct
The condition requires the encryption header; without it, the request fails.
Related concept
Read the scenario before looking for a memorised answer.
✗
The bucket automatically encrypts objects with SSE-S3 even if the request does not specify it.
Why it's wrong here
The policy only enforces client-provided encryption.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse the `StringNotEquals` condition with a requirement for client-side encryption or KMS, or assume that bucket default encryption would automatically satisfy the policy, when in fact the policy explicitly denies requests that do not include the correct header.
Detailed technical explanation
How to think about this question
The condition `s3:x-amz-server-side-encryption` checks the value of the `x-amz-server-side-encryption` header in the request. For SSE-S3, the header value must be `AES256`; for SSE-KMS, it would be `aws:kms`. The `StringNotEquals` condition operator denies any request where the header is not exactly `AES256`, including requests that omit the header entirely (since a missing header does not equal `AES256`). This is a common pattern for enforcing encryption at the API level, overriding any bucket default settings.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
Quick reference
AWS S3 Storage Class Comparison
Storage Class
Min Duration
Retrieval
Use Case
S3 Standard
None
Immediate
Frequently accessed data
S3 Standard-IA
30 days
Immediate
Infrequent access, rapid retrieval
S3 One Zone-IA
30 days
Immediate
Non-critical infrequent data
S3 Intelligent-Tiering
None
Immediate–hours
Unknown or changing access patterns
S3 Glacier Instant
90 days
Milliseconds
Archive with instant retrieval
S3 Glacier Flexible
90 days
Minutes–hours
Archive, flexible retrieval
S3 Glacier Deep Archive
180 days
Hours
Long-term compliance archive
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Technology — This question tests Technology — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Any PutObject request that does not include the encryption header will be denied. — The policy uses a `Deny` effect with a `StringNotEquals` condition on the `s3:x-amz-server-side-encryption` header, requiring it to be `AES256`. This enforces that any `PutObject` request must include the `x-amz-server-side-encryption: AES256` header; otherwise, the request is denied. Option C correctly states that requests without the encryption header will be denied.
What should I do if I get this PAS-C01 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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