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Development with AWS Services →hardMultiple 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.

Resources:
  MyQueue:
    Type: AWS::SQS::Queue
    Properties:
      QueueName: my-queue
  MyLambdaFunction:
    Type: AWS::Lambda::Function
    Properties:
      FunctionName: my-function
      Handler: index.handler
      Role: !GetAtt LambdaExecutionRole.Arn
      Code:
        ZipFile: |
          exports.handler = async (event) => {
            console.log('Received event:', JSON.stringify(event));
            return { statusCode: 200 };
          };
      Events:
        SQSEvent:
          Type: SQS
          Properties:
            Queue: !GetAtt MyQueue.Arn
            BatchSize: 10
  LambdaExecutionRole:
    Type: AWS::IAM::Role
    Properties:
      AssumeRolePolicyDocument:
        Version: '2012-10-17'
        Statement:
          - Effect: Allow
            Principal:
              Service: lambda.amazonaws.com
            Action: sts:AssumeRole
      ManagedPolicyArns:
        - arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole

Refer to the exhibit. A developer deploys this CloudFormation stack. The Lambda function is triggered by SQS messages. However, the function fails to process messages. 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.

Question 1hardmultiple choice
Full question →

Exhibit

Refer to the exhibit.

Resources:
  MyQueue:
    Type: AWS::SQS::Queue
    Properties:
      QueueName: my-queue
  MyLambdaFunction:
    Type: AWS::Lambda::Function
    Properties:
      FunctionName: my-function
      Handler: index.handler
      Role: !GetAtt LambdaExecutionRole.Arn
      Code:
        ZipFile: |
          exports.handler = async (event) => {
            console.log('Received event:', JSON.stringify(event));
            return { statusCode: 200 };
          };
      Events:
        SQSEvent:
          Type: SQS
          Properties:
            Queue: !GetAtt MyQueue.Arn
            BatchSize: 10
  LambdaExecutionRole:
    Type: AWS::IAM::Role
    Properties:
      AssumeRolePolicyDocument:
        Version: '2012-10-17'
        Statement:
          - Effect: Allow
            Principal:
              Service: lambda.amazonaws.com
            Action: sts:AssumeRole
      ManagedPolicyArns:
        - arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole

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 Lambda function's execution role does not have permissions to poll from SQS.

Correct: A. The Lambda execution role only has the AWSLambdaBasicExecutionRole policy, which grants permissions to write logs to CloudWatch. However, the Lambda function needs permission to poll and delete messages from SQS. The missing policy is AWSLambdaSQSQueueExecutionRole or a custom policy with sqs:ReceiveMessage, sqs:DeleteMessage, sqs:GetQueueAttributes. Option B is wrong because the SQS event source mapping is correctly defined. Option C is wrong because the function code is valid. Option D is wrong because the batch size of 10 is valid.

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 SQS queue event source mapping is not configured correctly.

    Why it's wrong here

    The event source mapping is defined correctly in the template.

  • ✗

    The batch size of 10 exceeds the maximum allowed batch size.

    Why it's wrong here

    The maximum batch size for SQS is 10; it's valid.

  • ✗

    The Lambda function code has a syntax error.

    Why it's wrong here

    The code appears syntactically correct.

  • ✓

    The Lambda function's execution role does not have permissions to poll from SQS.

    Why this is correct

    The role lacks SQS permissions like ReceiveMessage and DeleteMessage.

    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.

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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.

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 Lambda function's execution role does not have permissions to poll from SQS. — Correct: A. The Lambda execution role only has the AWSLambdaBasicExecutionRole policy, which grants permissions to write logs to CloudWatch. However, the Lambda function needs permission to poll and delete messages from SQS. The missing policy is AWSLambdaSQSQueueExecutionRole or a custom policy with sqs:ReceiveMessage, sqs:DeleteMessage, sqs:GetQueueAttributes. Option B is wrong because the SQS event source mapping is correctly defined. Option C is wrong because the function code is valid. Option D is wrong because the batch size of 10 is valid.

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

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.

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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Last reviewed: Jun 20, 2026

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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.