Free AWS Certified Developer – Associate Exam DVA-C01 Exam Practice Test

A developer has written an application that runs on Amazon EC2 instances. The developer is adding functionality for the application to write objects to an Amazon S3 bucket Which policy must the developer modify to allow the instances to write these objects?

• The 1AM policy that is attached to the EC2 instance profile role
• The session policy that is applied to the EC2 instance role session
• The AWS Key Management Service (AWS KMS) key policy that is attached to the EC2 instance profile role.
• The Amazon VPC endpoint policy

A company is adding stored value for gift card) capability to its highly popular casual gaming website. Users need to be able to trade this value for other users' items on the platform. This would require both users' records be updated as a single transaction, or both users' records to be completely rolled back.Which AWS database options can provide the transactional capability required for this new feature? (Select TWO )

• Amazon DynamoDB with operations made with the ConsistentRead parameter set to true
• Amazon ElastiCache for Memcached with operations made within a transaction block
• Amazon Aurora MySQL with operations made within a transaction block
• Amazon DynamoDB with reads and writes made using Transact' operations
• Amazon Redshift with operations made within a transaction block

An application is using single -node Amazon ElastiCache for Redis instance to improve read performance. Over time, demand for the application has increased exponentially, which has increased the load on the ElastiCache instance. It is critical that this cache layer handles the load and is resilient in case of node failures.What can the Developer do to address the load and resiliency requirements?

• Add a read replica instance.
• Migrate to a Memcached cluster.
• Migrate to an Amazon ElastiCache service cluster.
• Vertically scale the ElastiCache instance.

A Developer is working on an application that handles 10MB documents that contain highly-sensitive data. The application will use AWS KMS to perform client-side encryption.What steps must be followed?

• Invoke the Encrypt API passing the plaintext data that must be encrypted, then reference the customer managed key ARN in the KeyId parameter
• Invoke the GenerateRandom API to get a data encryption key, then use the data encryption key to encrypt the data
• Invoke the GenerateDataKey API to retrieve the encrypted version of the data encryption key to encrypt the data
• Invoke the GenerateDataKey API to retrieve the plaintext version of the data encryption key to encrypt the data

A company requires that AWS Lambda functions written by developers log errors so system administrators can more effectively troubleshoot issues What should the developers implement to meet this need?

• Publish errors to a dedicated Amazon SQS queue
• Create an Amazon CloudWatch Events event to trigger based on certain Lambda events.
• Report errors through logging statements in Lambda function code.
• Set up an Amazon SNS topic that sends logging statements upon failure

A Developer created a Lambda function for a web application backend. When testing the Lambda function from the AWS Lambda console, the Developer can see that the function is being executed, but there is no log data being generated in Amazon CloudWatch Logs, even after several minutes.What could cause this situation?

• The Lambda function does not have any explicit log statements for the log data to send it to CloudWatch Logs.
• The Lambda function is missing CloudWatch Logs as a source trigger to send log data.
• The execution role for the Lambda function is missing permissions to write log data to the CloudWatch Logs.
• The Lambda function is missing a target CloudWatch Log group.

A security review for a software company's application infrastructure shows that there is no test coverage in any of the company's deployment pipelines. A developer must fix this issue as soon as possible. The company has been integrating the AWS Cloud Development Kit (AWS CDK) into the deployment process. However, much of the pipeline still uses AWS CloudFormation templates. The developer needs to add test coverage to all the deployment code.Which solution will meet these requirements with the LEAST amount of configuration?

• Write unit tests by using the AWS CDK assertions module. Create CloudFormation template instances by using the module's Template class for the existing CloudFormation templates and the module's Capture class for the CDK stacks.
• Write unit tests by using the AWS CDK assertions module. Create CloudFormation template instances by using the module's Template.fromStringO method for the existing CloudFormation templates and the module's Template fromStackQ method for the CDK stacks.
• Convert the CloudFormation templates into CDK stacks by using the AWS CDK Cfnlnclude construct. Write unit tests against the templates by using CloudFormation rule assertions.
• Convert the CDK stacks into CloudFormation templates by using the AWS CDK Cfnlnclude construct Write unit tests against the templates by using CloudFormation rule assertions

A developer is designing a serverless application that customers use to select seats for a concert venue. Customers send the ticket requests to an Amazon API Gateway API with an AWS Lambda function that acknowledges the order and generates an order ID. The application includes two additional Lambda functions: one for inventory management and one for payment processing. These two Lambda functions run in parallel and write the order to an Amazon Dynamo DB table.The application must provide seats to customers according to the following requirements. If a seat is accidently sold more than once, the first order that the application received must get the seat. In these cases, the application must process the payment for only the first order. However, if the first order is rejected during payment processing, the second order must get the seat. In these cases, the application must process the payment for the second order.Which solution will meet these requirements?

• Send the order ID to an Amazon Simple Notification Service (Amazon SNS) FIFO topic that fans out to one Amazon Simple Queue Service (Amazon SQS) FIFO queue for inventory management and another SQS FIFO queue for payment processing.
• Change the Lambda function that generates the order ID to initiate the Lambda function for inventory management. Then initiate the Lambda function for payment processing.
• Send the order ID to an Amazon Simple Notification Service (Amazon SNS) topic. Subscribe the Lambda functions for inventory management and payment processing to the topic.
• Deliver the order ID to an Amazon Simple Queue Service (Amazon SQS) queue. Configure the Lambda functions for inventory management and payment processing to poll the queue.

A developer is migrating a legacy monolithic application to AWS and wants to convert the application's internal processes to microservices The application's internal processes communicate through internal asynchronous messaging Occasionally messages need to be reprocessed by multiple microservicesHow should the developer migrate the application's internal messaging to AWS to meet these requirements?

• Use Amazon Simple Queue Service (Amazon SQS) queues to communicate messages between the microservices
• Use Amazon API Gateway to provide REST interfaces between the microservices
• Use Amazon Kinesis Data Streams to communicate messages between the microservices
• Use Amazon API Gateway to provide WebSocket APIs between the microservices.

A developer from AnyCompany's AWS account needs access to the Example Corp AWS account AnyCompany uses an identity provider that is compatible with OpenID Connect.What is the MOST secure way for Example Corp to allow developer access?

• Create a cross-account role and call the AssumeRole API operation
• Create a user in the Example Corp account and provide the access keys
• Create a user in the Example Corp account and provide the credentials
• Create a cross-account role and call the AssumeRoleWithWebldentity API operation