DOP-C02 Resilient Cloud Solutions Practice Question
This DOP-C02 practice question tests your understanding of resilient cloud solutions. 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.
Refer to the exhibit. A DevOps engineer applies the IAM policy shown to an S3 bucket to enforce server-side encryption. However, users report that some uploads succeed without encryption. What is the most likely reason?
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 only allows the action but does not deny actions that do not meet the condition.
Option B is correct because the IAM policy only allows the s3:PutObject action when the encryption condition is met, but it does not include an explicit Deny statement to block uploads that do not satisfy the condition. In IAM, an Allow statement with a condition does not automatically deny requests that fail the condition; it simply does not apply the Allow. If there is another policy (e.g., a bucket policy or an identity-based policy) that grants s3:PutObject without the encryption condition, or if the default S3 behavior permits unencrypted uploads (since S3 does not require encryption by default), then unencrypted uploads can still succeed. To enforce encryption, you must add a Deny statement with a condition like `StringNotEquals` on `s3:x-amz-server-side-encryption` to explicitly reject requests that lack the required encryption header.
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 uses StringEquals instead of StringNotEquals.
Why it's wrong here
StringEquals is appropriate to require a specific value.
✓
The policy only allows the action but does not deny actions that do not meet the condition.
Why this is correct
Without an explicit Deny, other policies may allow uploads without encryption.
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 resource ARN is incorrect; it should be the bucket ARN.
Why it's wrong here
The resource ARN for objects is correctly specified as bucket/*.
✗
The action should be s3:PutEncryptedObject instead of s3:PutObject.
Why it's wrong here
s3:PutObject is the correct action for uploading objects.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume an Allow statement with a condition implicitly denies requests that don't meet the condition, but AWS IAM requires an explicit Deny to block non-compliant requests, and the absence of that Deny is the root cause of the enforcement failure.
Detailed technical explanation
How to think about this question
IAM policy evaluation logic follows an explicit deny override: an Allow statement with a condition only grants permission when the condition is true; if the condition is false, the Allow does not apply, but the request is not automatically denied unless a separate Deny statement matches. To enforce server-side encryption, you must use a Deny statement with `StringNotEquals` on the `s3:x-amz-server-side-encryption` condition key to reject any PutObject request that does not include the required encryption header (e.g., `AES256` or `aws:kms`). This is a common pattern for S3 bucket policies to enforce encryption at upload time, and without the Deny, unencrypted uploads can succeed if other policies (like the S3 default behavior or a broader Allow) permit them.
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.
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.
Resilient Cloud Solutions — This question tests Resilient Cloud Solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The policy only allows the action but does not deny actions that do not meet the condition. — Option B is correct because the IAM policy only allows the s3:PutObject action when the encryption condition is met, but it does not include an explicit Deny statement to block uploads that do not satisfy the condition. In IAM, an Allow statement with a condition does not automatically deny requests that fail the condition; it simply does not apply the Allow. If there is another policy (e.g., a bucket policy or an identity-based policy) that grants s3:PutObject without the encryption condition, or if the default S3 behavior permits unencrypted uploads (since S3 does not require encryption by default), then unencrypted uploads can still succeed. To enforce encryption, you must add a Deny statement with a condition like `StringNotEquals` on `s3:x-amz-server-side-encryption` to explicitly reject requests that lack the required encryption header.
What should I do if I get this DOP-C02 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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