This PAS-C01 practice question tests your understanding of operations and maintenance. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
An SAP system administrator notices that nightly SAP HANA backups to Amazon S3 are failing intermittently with 'Access Denied' errors. The backups are initiated by an AWS Lambda function that uses an IAM role. The role has a policy that grants s3:PutObject on the backup bucket. Which additional IAM action is most likely required to resolve the issue?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
s3:ListBucket
Why wrong: Listing is not required for uploading backups.
s3:PutObjectAcl
Required to set object ownership, especially when bucket policy enforces bucket owner full control.
s3:DeleteObject
Why wrong: Delete is not needed for uploading backups.
s3:GetObject
Why wrong: Get is for read access, not write.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
s3:PutObjectAcl
Option C is correct because S3 bucket policies often require s3:PutObjectAcl for cross-account access or when the bucket owner is different from the uploader. Option A is wrong because s3:ListBucket is for listing objects, not uploading. Option B is wrong because s3:GetObject is for reading, not writing. Option D is wrong because s3:DeleteObject is for removing objects, not uploading.
Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
s3:ListBucket
Why it's wrong here
Listing is not required for uploading backups.
s3:PutObjectAcl
Why this is correct
Required to set object ownership, especially when bucket policy enforces bucket owner full control.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Standard ACLs match source addresses.
s3:DeleteObject
Why it's wrong here
Delete is not needed for uploading backups.
s3:GetObject
Why it's wrong here
Get is for read access, not write.
Common exam traps
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Real-world example
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.
What to study next
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related PAS-C01 ACL questions on filtering logic and placement.
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FAQ
Operations and Maintenance — This question tests Operations and Maintenance — Standard ACLs match source addresses..
The correct answer is: s3:PutObjectAcl — Option C is correct because S3 bucket policies often require s3:PutObjectAcl for cross-account access or when the bucket owner is different from the uploader. Option A is wrong because s3:ListBucket is for listing objects, not uploading. Option B is wrong because s3:GetObject is for reading, not writing. Option D is wrong because s3:DeleteObject is for removing objects, not uploading.
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related PAS-C01 ACL questions on filtering logic and placement.
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Standard ACLs match source addresses.
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Last reviewed: Jun 20, 2026
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