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The AWS Certified Developer - Associate exam covers a wide range of topics, including AWS core services such as EC2, S3, and RDS, as well as AWS deployment and management tools such as Elastic Beanstalk, CloudFormation, and CodeDeploy. DVA-C02 Exam also covers topics such as application development, security, and troubleshooting, ensuring that the candidate has a deep understanding of how to design, develop, and deploy secure and scalable applications on AWS.

Amazon AWS Certified Developer - Associate Sample Questions (Q573-Q578):

NEW QUESTION # 573
A company is creating a REST service using an Amazon API Gateway with AWS Lambda integration. The service must run different versions for testing purposes.
What would be the BEST way to accomplish this?

A. Create an API Gateway Lambda authorizer to route API clients to the correct API version.
B. Create an API Gateway resource policy to isolate versions and provide context to the Lambda function(s).
C. Deploy the API versions as unique stages with unique endpoints and use stage variables to provide further context.
D. Use an X-Version header to denote which version is being called and pass that header to the Lambda function(s).

Answer: C

NEW QUESTION # 574
A developer is testing an application that invokes an AWS Lambda function asynchronously. During the testing phase the Lambda function fails to process after two retries.
How can the developer troubleshoot the failure?

A. Configure Amazon Simple Workflow Service to process any direct unprocessed events.
B. Configure Dead Letter Queues by sending events to Amazon SQS for investigation.
C. Configure AWS CloudTrail logging to investigate the invocation failures.
D. Configure AWS Config to process any direct unprocessed events.

Answer: B

Explanation:
This solution allows the developer to troubleshoot the failure by capturing unprocessed events in a queue for further analysis. Dead Letter Queues (DLQs) are queues that store messages that could not be processed by a service, such as Lambda, for various reasons, such as configuration errors, throttling limits, or permissions issues. The developer can configure DLQs for Lambda functions by sending events to either an Amazon Simple Queue Service (SQS) queue or an Amazon Simple Notification Service (SNS) topic. The developer can then inspect the messages in the queue or topic to identify and fix the root cause of the failure.
Configuring AWS CloudTrail logging will not capture invocation failures for asynchronous Lambda invocations, but only record API calls made by or on behalf of Lambda. Configuring Amazon Simple Workflow Service (SWF) or AWS Config will not process any direct unprocessed events, but require additional integration and configuration.

NEW QUESTION # 575
A company has a multi-node Windows legacy application that runs on premises. The application uses a network shared folder as a centralized configuration repository to store configuration files in .xml format. The company is migrating the application to Amazon EC2 instances. As part of the migration to AWS, a developer must identify a solution that provides high availability for the repository.
Which solution will meet this requirement MOST cost-effectively?

A. Create an Amazon S3 bucket to host the repository. Migrate the existing .xml files to the S3 bucket. Mount the S3 bucket to the EC2 instances as a local volume. Update the application code to read and write configuration files from the disk.
B. Create an Amazon S3 bucket to host the repository. Migrate the existing .xml files to the S3 bucket. Update the application code to use the AWS SDK to read and write configuration files from Amazon S3.
C. Deploy a micro EC2 instance with an instance store volume. Use the host operating system to share a folder. Update the application code to read and write configuration files from the shared folder.
D. Mount an Amazon Elastic Block Store (Amazon EBS) volume onto one of the EC2 instances. Deploy a file system on the EBS volume. Use the host operating system to share a folder. Update the application code to read and write configuration files from the shared folder.

Answer: B

Explanation:
Amazon S3 is a service that provides highly scalable, durable, and secure object storage. The developer can create an S3 bucket to host the repository and migrate the existing .xml files to the S3 bucket. The developer can update the application code to use the AWS SDK to read and write configuration files from S3. This solution will meet the requirement of high availability for the repository in a cost-effective way.
Reference:
[Amazon Simple Storage Service (S3)]
[Using AWS SDKs with Amazon S3]

NEW QUESTION # 576
A company is using AWS CloudFormation to deploy a two-tier application. The application will use Amazon RDS as its backend database. The company wants a solution that will randomly generate the database password during deployment. The solution also must automatically rotate the database password without requiring changes to the application.
What is the MOST operationally efficient solution that meets these requirements'?

A. Use a cron daemon on the application s host to generate and rotate the password.
B. Use an AWS Systems Manager Parameter Store resource with the SecureString data type to generate and rotate the password.
C. Use an AWS Lambda function as a CloudFormation custom resource to generate and rotate the password.
D. Use an AWS Secrets Manager resource to generate and rotate the password.

Answer: D

Explanation:
Explanation
This solution will meet the requirements by using AWS Secrets Manager, which is a service that helps protect secrets such as database credentials by encrypting them with AWS Key Management Service (AWS KMS) and enabling automatic rotation of secrets. The developer can use an AWS Secrets Manager resource in AWS CloudFormation template, which enables creating and managing secrets as part of a CloudFormation stack.
The developer can use an AWS::SecretsManager::Secret resource type to generate and rotate the password for accessing RDS database during deployment. The developer can also specify a RotationSchedule property for the secret resource, which defines how often to rotate the secret and which Lambda function to use for rotation logic. Option A is not optimal because it will use an AWS Lambda function as a CloudFormation custom resource, which may introduce additional complexity and overhead for creating and managing a custom resource and implementing rotation logic. Option B is not optimal because it will use an AWS Systems Manager Parameter Store resource with the SecureString data type, which does not support automatic rotation of secrets. Option C is not optimal because it will use a cron daemon on the application's host to generate and rotate the password, which may incur more costs and require more maintenance for running and securing a host.
References: [AWS Secrets Manager], [AWS::SecretsManager::Secret]

NEW QUESTION # 577
A company is building a scalable data management solution by using AWS services to improve the speed and agility of development. The solution will ingest large volumes of data from various sources and will process this data through multiple business rules and transformations. The solution requires business rules to run in sequence and to handle reprocessing of data if errors occur when the business rules run. The company needs the solution to be scalable and to require the least possible maintenance.
Which AWS service should the company use to manage and automate the orchestration of the data flows to meet these requirements?

A. AWS Glue
B. AWS Step Functions
C. AWS Batch
D. AWS Lambda

Answer: B

Explanation:
AWS Step Functions allows you to coordinate multiple AWS services into serverless workflows so you can build and update apps quickly. It also provides a way to handle errors and retry failed steps, making it a good fit for the company's requirements.

NEW QUESTION # 578
......

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