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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.

Exhibit

Refer to the exhibit.

```
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": "s3:PutObject",
      "Resource": "arn:aws:s3:::my-bucket/*",
      "Condition": {
        "StringEquals": {
          "s3:x-amz-server-side-encryption": "AES256"
        }
      }
    },
    {
      "Effect": "Deny",
      "Action": "s3:PutObject",
      "Resource": "arn:aws:s3:::my-bucket/*",
      "Condition": {
        "StringNotEquals": {
          "s3:x-amz-server-side-encryption": "AES256"
        }
      }
    }
  ]
}
```

A DevOps engineer applies this S3 bucket policy to an S3 bucket. What is the effect of this policy?

Question 1hardmultiple choice
Full question →

Exhibit

Refer to the exhibit.

```
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": "s3:PutObject",
      "Resource": "arn:aws:s3:::my-bucket/*",
      "Condition": {
        "StringEquals": {
          "s3:x-amz-server-side-encryption": "AES256"
        }
      }
    },
    {
      "Effect": "Deny",
      "Action": "s3:PutObject",
      "Resource": "arn:aws:s3:::my-bucket/*",
      "Condition": {
        "StringNotEquals": {
          "s3:x-amz-server-side-encryption": "AES256"
        }
      }
    }
  ]
}
```

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

All objects uploaded must use server-side encryption with Amazon S3 managed keys (SSE-S3).

The S3 bucket policy in question denies uploads unless the `x-amz-server-side-encryption` header is set to `AES256`, which is the value for SSE-S3 (Amazon S3 managed keys). This ensures that all objects uploaded to the bucket must be encrypted using server-side encryption with S3-managed keys (SSE-S3). Option C correctly identifies this requirement.

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.

  • ✗

    All objects uploaded must be encrypted with SSE-C.

    Why it's wrong here

    SSE-C uses customer-provided keys, not AES256 in the policy.

  • ✗

    All uploads to the bucket are blocked.

    Why it's wrong here

    Uploads with AES256 are allowed.

  • ✓

    All objects uploaded must use server-side encryption with Amazon S3 managed keys (SSE-S3).

    Why this is correct

    The policy allows only PutObject with s3:x-amz-server-side-encryption set to AES256.

    Related concept

    Read the scenario before looking for a memorised answer.

  • ✗

    All objects uploaded must be encrypted with SSE-KMS.

    Why it's wrong here

    The policy requires SSE-S3 (AES256), not KMS.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates confuse the `x-amz-server-side-encryption` header values: `AES256` is specific to SSE-S3, not SSE-C or SSE-KMS, leading to incorrect selections of A or D.

Detailed technical explanation

How to think about this question

The policy uses a `Deny` effect with a `StringNotEquals` condition on the `s3:x-amz-server-side-encryption` header, which is a common pattern to enforce encryption at upload time. Under the hood, S3 evaluates the policy before processing the request; if the header is missing or set to a value other than `AES256`, the request is denied with an `AccessDenied` error. This approach is often used in combination with bucket default encryption settings to ensure compliance, but note that the policy only applies to PUT requests that include the header—it does not enforce encryption on objects uploaded via multipart upload or copy operations unless those operations also include the header.

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.

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FAQ

Questions learners often ask

What does this DOP-C02 question test?

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: All objects uploaded must use server-side encryption with Amazon S3 managed keys (SSE-S3). — The S3 bucket policy in question denies uploads unless the `x-amz-server-side-encryption` header is set to `AES256`, which is the value for SSE-S3 (Amazon S3 managed keys). This ensures that all objects uploaded to the bucket must be encrypted using server-side encryption with S3-managed keys (SSE-S3). Option C correctly identifies this requirement.

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.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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Last reviewed: Jun 24, 2026

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This DOP-C02 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 DOP-C02 exam.