The answer is that an explicit Deny statement on s3:GetObject is the most likely cause, because in AWS IAM policy evaluation logic, a Deny always overrides any Allow. Even though the user has s3:ListBucket permission to see the objects, the explicit Deny on downloading them blocks the action entirely. This tests your understanding of the fundamental AWS security principle that Deny statements are absolute and cannot be bypassed by any Allow—a core concept for the CompTIA ITF+ FC0-U61 exam, which often uses S3 bucket permissions to illustrate how policy precedence works. A common trap is assuming that having list access implies read access, but the exam wants you to recognize that Deny overrides all. Remember the mnemonic: “Deny is the final say—it always gets its way.”
FC0-U61 Software Development Concepts Practice Question
This FC0-U61 practice question tests your understanding of software development concepts. 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.
A developer is troubleshooting an issue where a user can list the objects in an S3 bucket but cannot download any of them. Based on the exhibit, 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 Deny statement on s3:GetObject explicitly denies object retrieval.
The exhibit shows an explicit Deny statement for s3:GetObject, which overrides any Allow statements due to AWS IAM policy evaluation logic. Even if the user has s3:ListBucket permission to list objects, the Deny on s3:GetObject prevents downloading any objects. This is the most likely cause because AWS Deny statements are absolute and cannot be overridden by Allow statements.
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 user lacks permissions to list the bucket.
Why it's wrong here
The user can list objects, so this is not the cause.
✗
The Allow statement on s3:ListBucket also allows downloads.
Why it's wrong here
ListBucket only allows listing, not downloading.
✓
The Deny statement on s3:GetObject explicitly denies object retrieval.
Why this is correct
Deny overrides Allow, preventing downloads.
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 is malformed and causes an error.
Why it's wrong here
The policy is syntactically correct.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume that having ListBucket permission implies full read access, but AWS separates listing (s3:ListBucket) from reading object data (s3:GetObject), and an explicit Deny on GetObject overrides any Allow.
Detailed technical explanation
How to think about this question
AWS IAM policy evaluation uses an explicit Deny as an override: if any policy (identity-based or resource-based) includes an explicit Deny for an action, that action is blocked regardless of any Allow statements. This is part of the AWS IAM policy evaluation logic documented in the AWS IAM User Guide, where Deny statements are evaluated first and take precedence. In real-world scenarios, this is commonly used to enforce security boundaries, such as preventing object downloads from a bucket even when users have list permissions for auditing purposes.
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 security administrator must allow nursing staff to reach a patient records server while blocking access from the guest Wi-Fi VLAN. After applying an extended ACL, traffic is still blocked from nursing workstations. The ACL was applied outbound instead of inbound on the wrong interface. Questions like this test ACL direction and placement rules.
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.
Software Development Concepts — This question tests Software Development Concepts — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The Deny statement on s3:GetObject explicitly denies object retrieval. — The exhibit shows an explicit Deny statement for s3:GetObject, which overrides any Allow statements due to AWS IAM policy evaluation logic. Even if the user has s3:ListBucket permission to list objects, the Deny on s3:GetObject prevents downloading any objects. This is the most likely cause because AWS Deny statements are absolute and cannot be overridden by Allow statements.
What should I do if I get this FC0-U61 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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.
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Question Discussion
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