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Development with AWS Services →mediumMultiple ChoiceObjective-mapped

DVA-C02 Development with AWS Services Practice Question

This DVA-C02 practice question tests your understanding of development with aws services. 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.

Exhibit

Refer to the exhibit.

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": [
        "s3:GetObject",
        "s3:PutObject"
      ],
      "Resource": "arn:aws:s3:::my-bucket/*"
    },
    {
      "Effect": "Allow",
      "Action": [
        "kms:Decrypt",
        "kms:GenerateDataKey"
      ],
      "Resource": "arn:aws:kms:us-east-1:123456789012:key/abc123"
    }
  ]
}

A developer is troubleshooting an issue where an IAM user is unable to upload a file to an S3 bucket that uses server-side encryption with AWS KMS (SSE-KMS). The IAM policy shown in the exhibit is attached to the user. What is the likely cause of the failure?

Question 1mediummultiple choice

Full question →

Exhibit

Refer to the exhibit.

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": [
        "s3:GetObject",
        "s3:PutObject"
      ],
      "Resource": "arn:aws:s3:::my-bucket/*"
    },
    {
      "Effect": "Allow",
      "Action": [
        "kms:Decrypt",
        "kms:GenerateDataKey"
      ],
      "Resource": "arn:aws:kms:us-east-1:123456789012:key/abc123"
    }
  ]
}

A
The KMS key ARN in the resource statement is incorrect.
Why wrong: The key ARN appears valid; this is not the likely cause.
B
The user does not have s3:PutObject permission on the bucket.
Why wrong: The policy includes s3:PutObject, so this is not the issue.
C
The user does not have kms:Encrypt permission on the KMS key.
When using SSE-KMS, the s3:PutObject action requires kms:Encrypt (or kms:GenerateDataKey, which is included, but encrypt is needed for upload). Actually, for upload, kms:Encrypt is required; the policy only has kms:Decrypt and kms:GenerateDataKey, which are for download/read. So missing kms:Encrypt causes failure.
D
The user does not have access to the KMS key at all.
Why wrong: The user has some KMS permissions, but lacks the specific encrypt permission needed for upload.

Full breakdown with real-world context →

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

✓

The user does not have kms:Encrypt permission on the KMS key.

The correct answer is B. The policy allows s3:PutObject but does not include kms:Encrypt, which is required for uploading objects with SSE-KMS. Option A is wrong because the policy allows s3:PutObject. Option C is wrong because the KMS key is specified. Option D is wrong because the user may not have KMS permissions, but the missing action is kms:Encrypt.

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 KMS key ARN in the resource statement is incorrect.
Why it's wrong here
The key ARN appears valid; this is not the likely cause.
✗
The user does not have s3:PutObject permission on the bucket.
Why it's wrong here
The policy includes s3:PutObject, so this is not the issue.
✓
The user does not have kms:Encrypt permission on the KMS key.
Why this is correct
When using SSE-KMS, the s3:PutObject action requires kms:Encrypt (or kms:GenerateDataKey, which is included, but encrypt is needed for upload). Actually, for upload, kms:Encrypt is required; the policy only has kms:Decrypt and kms:GenerateDataKey, which are for download/read. So missing kms:Encrypt causes failure.
Related concept
Read the scenario before looking for a memorised answer.
✗
The user does not have access to the KMS key at all.
Why it's wrong here
The user has some KMS permissions, but lacks the specific encrypt permission needed for upload.

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.

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 DVA-C02 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.

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FAQ

Questions learners often ask

What does this DVA-C02 question test?

Development with AWS Services — This question tests Development with AWS Services — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: The user does not have kms:Encrypt permission on the KMS key. — The correct answer is B. The policy allows s3:PutObject but does not include kms:Encrypt, which is required for uploading objects with SSE-KMS. Option A is wrong because the policy allows s3:PutObject. Option C is wrong because the KMS key is specified. Option D is wrong because the user may not have KMS permissions, but the missing action is kms:Encrypt.

What should I do if I get this DVA-C02 question wrong?

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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This DVA-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 DVA-C02 exam.

DVA-C02 Development with AWS Services Practice Question

Exhibit

Exhibit

Why each option matters

Option-by-option breakdown

Common exam trap: answer the scenario, not the keyword

How to think about this question

KKey Concepts to Remember

TExam Day Tips

How this comes up in practice

Got this wrong? Here's your next step.

Related DVA-C02 practice-question pages

Development with AWS Services practice questions

Security practice questions

Deployment practice questions

Troubleshooting and Optimization practice questions

DVA-C02 fundamentals practice questions

DVA-C02 scenario practice questions

DVA-C02 troubleshooting practice questions

Start a free DVA-C02 practice session

Questions learners often ask

What does this DVA-C02 question test?

What is the correct answer to this question?

What should I do if I get this DVA-C02 question wrong?

What is the key concept behind this question?

More DVA-C02 practice questions

Question Discussion