The answer is that the IAM policy is missing the kms:GenerateDataKey and kms:Encrypt permissions. This is correct because when an S3 bucket uses server-side encryption with AWS KMS (SSE-KMS), any PutObject request must include these two KMS actions to generate and encrypt the data key used for the upload; without them, the backup process fails with an 'Access Denied' error even though s3:PutObject is allowed. On the AWS Certified SAP on AWS Specialty PAS-C01 exam, this scenario tests your understanding of how KMS permissions interact with S3 operations, often appearing as a trap where candidates assume s3:PutObject alone is sufficient or mistakenly add s3:GetObject. A common memory tip is to remember that for uploads to a KMS-encrypted bucket, you need the "key generation and encryption pair"—think "Generate and Encrypt" as the two keys that unlock the upload.
PAS-C01 Operations and Maintenance Practice Question
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.
Refer to the exhibit. An SAP administrator has attached the IAM policy above to an IAM role used by an EC2 instance for S3 backup operations. The backup process fails with 'Access Denied' when trying to upload a backup file. What is the most likely cause?
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.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The policy does not include kms:GenerateDataKey and kms:Encrypt
The policy allows s3:PutObject but missing kms:GenerateDataKey and kms:Encrypt for server-side encryption. Without those, PutObject fails if the bucket uses KMS encryption. The s3:GetObject is not needed for upload. kms:Decrypt alone is insufficient.
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 policy does not include s3:ListBucket permission
Why it's wrong here
ListBucket is not required for PutObject.
✓
The policy does not include kms:GenerateDataKey and kms:Encrypt
Why this is correct
KMS encrypted S3 operations require these permissions.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The policy allows kms:Decrypt on all resources, which is too permissive
Why it's wrong here
Excessive permissions do not cause Access Denied.
✗
The policy uses s3:PutObject but the bucket policy denies uploads
Why it's wrong here
The exhibit does not show a bucket policy; the error is likely due to missing KMS permissions.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Trap categories for this question
Command / output trap
The exhibit does not show a bucket policy; the error is likely due to missing KMS permissions.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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.
What to study next
Got this wrong? Here's your next step.
Identify which PAS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Operations and Maintenance — This question tests Operations and Maintenance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The policy does not include kms:GenerateDataKey and kms:Encrypt — The policy allows s3:PutObject but missing kms:GenerateDataKey and kms:Encrypt for server-side encryption. Without those, PutObject fails if the bucket uses KMS encryption. The s3:GetObject is not needed for upload. kms:Decrypt alone is insufficient.
What should I do if I get this PAS-C01 question wrong?
Identify which PAS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This PAS-C01 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PAS-C01 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.