Courseiva
← DVA-C02
Full test
Question 1,406 of 1,616
Development with AWS Services →hardMultiple ChoiceObjective-mapped

How to Ensure All S3 Objects Are Encrypted with SSE-KMS

This DVA-C02 practice question tests your understanding of development with aws services. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.

CloudFormation snippet:
Resources:
  MyBucket:
    Type: AWS::S3::Bucket
    Properties:
      BucketName: !Sub "${AWS::StackName}-bucket"
      VersioningConfiguration:
        Status: Enabled
      LifecycleConfiguration:
        Rules:
          - Id: ExpireOldVersions
            Status: Enabled
            NoncurrentVersionExpirationInDays: 30
  MyQueue:
    Type: AWS::SQS::Queue
    Properties:
      QueueName: !Sub "${AWS::StackName}-queue"
  MyBucketPolicy:
    Type: AWS::S3::BucketPolicy
    Properties:
      Bucket: !Ref MyBucket
      PolicyDocument:
        Statement:
          - Effect: Allow
            Principal: "*"
            Action: "s3:PutObject"
            Resource: !Sub "${MyBucket.Arn}/*"
            Condition:
              StringEquals:
                s3:x-amz-server-side-encryption: "aws:kms"

Refer to the exhibit. A developer creates a CloudFormation stack with this template. The developer wants to ensure that all objects uploaded to the bucket are encrypted at rest using SSE-KMS. However, the current policy allows anyone to put objects without encryption. What additional change is needed to enforce SSE-KMS?

Exhibit

Refer to the exhibit.

CloudFormation snippet:
Resources:
  MyBucket:
    Type: AWS::S3::Bucket
    Properties:
      BucketName: !Sub "${AWS::StackName}-bucket"
      VersioningConfiguration:
        Status: Enabled
      LifecycleConfiguration:
        Rules:
          - Id: ExpireOldVersions
            Status: Enabled
            NoncurrentVersionExpirationInDays: 30
  MyQueue:
    Type: AWS::SQS::Queue
    Properties:
      QueueName: !Sub "${AWS::StackName}-queue"
  MyBucketPolicy:
    Type: AWS::S3::BucketPolicy
    Properties:
      Bucket: !Ref MyBucket
      PolicyDocument:
        Statement:
          - Effect: Allow
            Principal: "*"
            Action: "s3:PutObject"
            Resource: !Sub "${MyBucket.Arn}/*"
            Condition:
              StringEquals:
                s3:x-amz-server-side-encryption: "aws:kms"

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

✓

Set the bucket's default encryption configuration to SSE-KMS.

Option A is correct because setting the bucket's default encryption configuration to SSE-KMS ensures that all new objects uploaded to the bucket are automatically encrypted at rest using AWS KMS-managed keys, even if the upload request does not include encryption headers. This enforces SSE-KMS without requiring changes to the bucket policy or the condition block, and it applies to all PutObject requests by default.

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.

  • ✓

    Set the bucket's default encryption configuration to SSE-KMS.

    Why this is correct

    Default encryption ensures encryption even if not specified in request.

    Related concept

    Read the scenario before looking for a memorised answer.

  • ✗

    Add a bucket policy that denies PutObject if encryption is not set.

    Why it's wrong here

    The condition already does that; need default encryption.

  • ✗

    Modify the condition to use s3:x-amz-server-side-encryption-aws-kms-key-id.

    Why it's wrong here

    That is for specific key ID, not necessary.

  • ✗

    Remove the condition to allow all PutObject requests.

    Why it's wrong here

    Would disable encryption enforcement.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates often assume a bucket policy is the only way to enforce encryption, but they overlook that default encryption configuration provides a simpler, more reliable mechanism that applies automatically without requiring policy condition logic.

Detailed technical explanation

How to think about this question

Under the hood, S3 default encryption is applied at the bucket level and automatically encrypts objects using the specified method (SSE-S3, SSE-KMS, or DSSE-KMS) when the object is written, regardless of whether the PutObject request includes encryption headers. This is particularly useful for legacy applications or third-party tools that do not support encryption headers, as it ensures compliance without code changes. A subtle behavior is that if a request includes an encryption header that conflicts with the default encryption (e.g., SSE-S3 header when default is SSE-KMS), the request header takes precedence, so the default encryption is not applied.

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.

Related practice questions

Related DVA-C02 practice-question pages

Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.

Development with AWS Services practice questions

Practise DVA-C02 questions linked to Development with AWS Services.

Security practice questions

Practise DVA-C02 questions linked to Security.

Deployment practice questions

Practise DVA-C02 questions linked to Deployment.

Troubleshooting and Optimization practice questions

Practise DVA-C02 questions linked to Troubleshooting and Optimization.

DVA-C02 fundamentals practice questions

Practise DVA-C02 questions linked to DVA-C02 fundamentals.

DVA-C02 scenario practice questions

Practise DVA-C02 questions linked to DVA-C02 scenario.

DVA-C02 troubleshooting practice questions

Practise DVA-C02 questions linked to DVA-C02 troubleshooting.

Practice this exam

Start a free DVA-C02 practice session

Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.

10 questions20 questions30 questions50 questionsTimed 30
DVA-C02 practice-test guide →Study guide →Browse all practice tests

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: Set the bucket's default encryption configuration to SSE-KMS. — Option A is correct because setting the bucket's default encryption configuration to SSE-KMS ensures that all new objects uploaded to the bucket are automatically encrypted at rest using AWS KMS-managed keys, even if the upload request does not include encryption headers. This enforces SSE-KMS without requiring changes to the bucket policy or the condition block, and it applies to all PutObject requests by default.

What should I do if I get this DVA-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.

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 →

How Courseiva writes practice questions · Editorial policy

Keep practising

More DVA-C02 practice questions

Browse all DVA-C02 questions →

Last reviewed: Jul 4, 2026

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.

Loading comments…

Sign in to join the discussion.

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.