DVA-C01 (Page 12)

A developer is exposing an API by using Amazon API Gateway and AWS Lambda as the backend for an application.The developer wants to add validation rules for a POST method to ensure that the data from the frontend web form is valid.The validation rules must include mandatory fields, data type, length, and regular expressions.Which solution will meet these requirements?Read More →

A static website is hosted in an Amazon S3 bucket.Several HTML pages on the site use JavaScript to download images from another Amazon S3 bucket.These images are not displayed when users browse the site.What is the possible cause for the issue?Read More →

A developer has created a new IAM user that has the s3:PutObject permission to write to a specific Amazon S3 bucket.The S3 bucket uses server-side encryption with AWS KMS managed keys (SSE-KMS) as the default encryption.When an application uses the access key and secret key of the IAM user to call the PutObject API operation, the application receives an access denied error.What should the developer do to resolve this error?Read More →

A developer has written code for an application and wants to share it with other developers on the team to receive feedback.The shared application code needs to be stored long-term with multiple versions and batch change tracking.Which AWS service should the developer use?Read More →

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 run, but there is no log data being generated in Amazon CloudWatch Logs, even after several minutes.What could cause this situation?Read More →

An application is using Amazon DynamoDB as its data store, and should be able to read 100 items per second as strongly consistent reads.Each item is 5 KB in size.To what value should the table’s provisioned read throughput be set?Read More →

A company has a website that displays a daily newsletter.When a user visits the website, an AWS Lambda function processes the browser’s request and queries the company’s on-premises database to obtain the current newsletter.The newsletters are stored in English.The Lambda function uses the Amazon TranslateTranslateText API operation to translate the newsletters, and the translation is displayed to the user.Due to an increase in popularity, the website’s response time has slowed.The database is overloaded.The company cannot change the database and needs a solution that improves the response time of the Lambda function.Which solution meets these requirements?Read More →

A developer is setting up the deployment of application stacks to new test environments by using the AWS Cloud Development Kit (AWS CDK).The application contains the code for several AWS Lambda functions that will be deployed as assets.Each Lambda function is defined by using the AWS CDK Lambda construct library.The developer has already successfully deployed the application stacks to the alpha environment in the first account by using the AWS CDK CLI’s cdk deploy command.The developer is preparing to deploy to the beta environment in a second account for the first time.The developer makes no significant changes to the CDK code between deployments, but the initial deployment in the second account is unsuccessful and returns a NoSuchBucket error.Which command should the developer run before redeployment to resolve this error?Read More →

A company has hundreds of AWS Lambda functions that the company’s QA team needs to test by using the Lambda function URLs.A developer needs to configure the authentication of the Lambda functions to allow access so that the QA IAM group can invoke the Lambda functions by using the public URLs.Which solution will meet these requirements?Read More →

A serverless application is using AWS Step Functions to process data and save it to a database.The application needs to validate some data with an external service before saving the data.The application will call the external service from an AWS Lambda function, and the external service will take a few hours to validate the data.The external service will respond to a webhook when the validation is complete.A developer needs to pause the Step Functions workflow and wait for the response from the external service.What should the developer do to meet this requirement?Read More →