A developer maintains a critical business application that uses Amazon DynamoDB as the primary data store The DynamoDB table contains millions of documents and receives 30-60 requests each minute The developer needs to perform processing in near-real time on the documents when they are added or updated in the DynamoDB table How can the developer implement this feature with the LEAST amount of change to the existing application code?

• A.Set up a cron job on an Amazon EC2 instance Run a script every hour to query the table for changes and process the documents
• B.Enable a DynamoDB stream on the table Invoke an AWS Lambda function to process the documents.
• C.Update the application to send a PutEvents request to Amazon EventBridge. Create an EventBridge rule to invoke an AWS Lambda function to process the documents.
• D.Update the application to synchronously process the documents directly after the DynamoDB write

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A developer is creating a machine learning (ML) pipeline in AWS Step Functions that contains AWS Lambda functions. The developer has configured an Amazon Simple Queue Service (Amazon SQS) queue to deliver ML model parameters to the ML pipeline to train ML models. The developer uploads the trained models are uploaded to an Amazon S3 bucket.
The developer needs a solution that can locally test the ML pipeline without making service integration calls to Amazon SQS and Amazon S3.
Which solution will meet these requirements?

• A.Use the AWS Step Functions Local Docker Image to run and locally test the Lambda functions.
• B.Use the AWS Serverless Application Model (AWS SAM) CLI to run and locally test the Lambda functions.
• C.Use AWS Step Functions Local with mocked service integrations.
• D.Use the Amazon CodeGuru Profiler to analyze the Lambda functions used in the AWS Step Functions pipeline.

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A company runs an application on AWS The application stores data in an Amazon DynamoDB table Some queries are taking a long time to run These slow queries involve an attribute that is not the table's partition key or sort key The amount of data that the application stores in the DynamoDB table is expected to increase significantly. A developer must increase the performance of the queries.
Which solution will meet these requirements'?

• A.Increase the page size for each request by setting the Limit parameter to be higher than the default value Configure the application to retry any request that exceeds the provisioned throughput.
• B.Create a global secondary index (GSI). Set query attribute to be the partition key of the index
• C.Perform a parallel scan operation by issuing individual scan requests in the parameters specify the segment for the scan requests and the total number of segments for the parallel scan.
• D.Turn on read capacity auto scaling for the DynamoDB table. Increase the maximum read capacity units (RCUs).

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A developer at a company writes an AWS CloudFormation template. The template refers to subnets that were created by a separate AWS CloudFormation template that the company's network team wrote. When the developer attempts to launch the stack for the first time, the launch fails.
Which template coding mistakes could have caused this failure? (Choose two.)

• A.The network team's template does not export the subnets in the Outputs section.
• B.The Mappings section of the developer's template does not refer to the subnets.
• C.The network team's template does not export the subnets in the Mappings section.
• D.The developer's template does not use the Ref intrinsic function to refer to the subnets.
• E.The developer's template does not use the ImportValue intrinsic function to refer to the subnets.

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A developer is migrating some features from a legacy monolithic application to use AWS Lambda functions instead. The application currently stores data in an Amazon Aurora DB cluster that runs in private subnets in a VPC. The AWS account has one VPC deployed. The Lambda functions and the DB cluster are deployed in the same AWS Region in the same AWS account.
The developer needs to ensure that the Lambda functions can securely access the DB cluster without crossing the public internet.
Which solution will meet these requirements?

• A.Configure the DB cluster's public access setting to Yes.
• B.Configure an Amazon RDS database proxy for the Lambda functions.
• C.Configure a NAT gateway and a security group for the Lambda functions.
• D.Configure the VPC, subnets, and a security group for the Lambda functions.

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