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The Amazon DVA-C02 Exam covers a wide range of topics, including AWS core services such as EC2, S3, and RDS, as well as developer-focused services like AWS Lambda, API Gateway, and DynamoDB. Candidates are tested on their ability to design, develop, and deploy cloud-based applications using AWS services. They are also expected to have a good understanding of AWS security, best practices, and cost optimization.

Amazon AWS Certified Developer - Associate Sample Questions (Q887-Q892):

NEW QUESTION # 887
A company has a web application that is deployed on AWS. The application uses an Amazon API Gateway API and an AWS Lambda function as its backend.
The application recently demonstrated unexpected behavior. A developer examines the Lambda function code, finds an error, and modifies the code to resolve the problem. Before deploying the change to production, the developer needs to run tests to validate that the application operates properly.
The application has only a production environment available. The developer must create a new development environment to test the code changes. The developer must also prevent other developers from overwriting these changes during the test cycle.
Which combination of steps will meet these requirements with the LEAST development effort?
(Choose two.)

A. Create a new API Gateway API for the development environment. Add a resource and method with Lambda integration. Choose the Lambda function and the hotfix alias. Deploy to a new stage. Test the backend.
B. Create a new resource in the current stage. Create a new method with Lambda proxy integration.
Select the Lambda function. Add the hotfix alias. Redeploy the current stage. Test the backend.
C. Modify the Lambda function by fixing the code. Test the Lambda function. Create the alias hotfix.
Point the alias to the $LATEST version.
D. Modify the Lambda function by fixing the code. Test the Lambda function. When the Lambda function is working as expected, publish the Lambda function as a new version. Create the alias hotfix. Point the alias to the new version.
E. Update the Lambda function in the API Gateway API integration request to use the hotfix alias.
Deploy the API Gateway API to a new stage named hotfix. Test the backend.

Answer: D,E

NEW QUESTION # 888
A developer needs to improve security for database credentials in an Amazon ECS environment.
Currently, the developer stores Amazon Aurora PostgreSQL credentials directly in ECS task definition environment variables. The developer must implement a more secure method to provide the database credentials to running task instances. Which solution will meet these requirements with the LEAST development effort?

A. Store the credentials as a secret in AWS Secrets Manager. Create a task execution IAM role that has permissions to access the secret. Reference the Amazon Resource Name (ARN) of the secret in the ECS task definition secret. Update the ECS container to load the credentials from the environment variables.
B. Create a customer managed AWS KMS key. Use the KMS key to encrypt the credentials. Add the encrypted credential to the ECS task definition environment variables. Create a task IAM role that has permissions to use the KMS key. Update the ECS container to load and decrypt the credentials from the environment variables.
C. Store the credentials as a secret in AWS Secrets Manager. Create a task IAM role that has permissions to access the secret. Add an entry to the ECS task definition's secrets list that retrieves the value from the Amazon Resource Name (ARN) of the secret.
D. Use an AWS managed AWS KMS key to encrypt the credentials. Add the encrypted credentials to the ECS task definition environment variables. Create a task IAM role that has permissions to use the KMS key. Update the ECS container to load and decrypt the credentials from the environment variables.

Answer: C

Explanation:
Storing credentials in AWS Secrets Manager and referencing them directly in the ECS task definition's secrets section enables secure retrieval of secrets at runtime without embedding sensitive data in environment variables. Assigning the correct task IAM role permissions allows seamless access with minimal development effort.

NEW QUESTION # 889
A developer is using an AWS CodePipeline pipeline to provide continuous integration and continuous delivery (CI/CD) support for a Java application. The developer needs to update the pipeline to support the introduction of a new application dependency .jar file. The pipeline must start a build when a new version of the .jar file becomes available.
Which solution will meet these requirements?

A. Create an Amazon Elastic Container Registry (Amazon ECR) private repository. Publish the dependency .jar file to the repository. Use an Amazon Simple Notification Service (Amazon SNS) notification to start a CodePipeline pipeline build.
B. Create an Amazon S3 bucket to store the dependency .jar file. Publish the dependency .jar file to the S3 bucket. Use an Amazon Simple Notification Service (Amazon SNS) notification to start a CodePipeline pipeline build.
C. Create an Amazon Elastic Container Registry (Amazon ECR) private repository. Publish the dependency .jar file to the repository. Use an ECR source action to start a CodePipeline pipeline build.
D. Create an AWS CodeArtifact repository. Publish the dependency .jar file to the repository. Use an Amazon EventBridge rule to start a CodePipeline pipeline build.

Answer: D

Explanation:
https://docs.aws.amazon.com/codeartifact/latest/ug/configure-service-events- codepipeline.html#configure-service-events-codepipeline-create-rule

NEW QUESTION # 890
A company uses imported certificates in AWS Certificate Manager (ACM) to access the company's public websites. The company needs a solution to ensure that a security team receives a notification a minimum of 30 days before any certificate expires. Which solution will meet this requirement with the LEAST development effort?

A. Create an Amazon SNS topic, and subscribe the security team to the topic. Create an Amazon EventBridge rule with an event pattern. Set the source as aws.securityhub. Set a detail type of Security Hub Findings - Imported and a detail of ACM Certificate Approaching Expiration. Set the SNS topic as the target for the rule.
B. Create a shell script that runs AWS CLI commands to check each ACM certificate's expiration date. Send an email notification to the security team when a certificate will expire within 30 days.
Use a cron job to schedule the script to run every night on an Amazon EC2 instance.
C. Create an Amazon SNS topic, and subscribe the security team to the topic. Create an Amazon EventBridge rule with an event pattern. Set the source as aws.acm. Set a detail type of ACM Certificate Approaching Expiration. Set the SNS topic as the target for the rule.
D. Create a shell script that runs AWS CLI commands to check each ACM certificate's expiration date. Send an email notification to the security team when a certificate will expire within 30 days.
Use a cron job in AWS CloudShell to schedule the script to run every night.

Answer: C

Explanation:
Amazon EventBridge automatically emits events for ACM certificate expiration notifications with the source aws.acm and detail type ACM Certificate Approaching Expiration. Creating a rule with this event pattern and setting an SNS topic as the target provides an automated, serverless solution with minimal development effort.

NEW QUESTION # 891
A company has developed an application that uses AWS Lambda functions to process messages from an Amazon SQS queue. One of the Lambda functions makes a call to an external API that is expected to encounter temporary service unavailability.
A developer needs to configure the function to retry failed messages from an Amazon SQS dead-letter queue.
The developer notices that the Lambda function is re-processing some messages in the queue more than once.
Which solution will resolve this issue?

A. Set a message retention period for each message. Configure the Lambda function to add a MessageId to each message.
B. Set the delivery delay parameter at the queue level. Configure the Lambda function to delete processed messages from the queue.
C. Set the visibility timeout parameter at the queue level. Configure the Lambda function to delete processed messages from the queue.
D. Set a receive message wait time for each message. Configure the Lambda function to add a MessageId to each message.

Answer: C

Explanation:
* Why Option B is Correct:Setting the visibility timeout ensures that once a message is being processed, it is temporarily hidden from other consumers. The Lambda function must delete processed messages to avoid re-processing when the visibility timeout expires.
* Why Other Options are Incorrect:
* Option A: Message retention affects how long messages stay in the queue, not how they are processed.
* Option C: Receive message wait time optimizes long polling but does not prevent re-processing.
* Option D: Delivery delay introduces latency for new messages and does not address message re- processing.
* AWS Documentation References:
* Using SQS Visibility Timeout

NEW QUESTION # 892
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