A Developer must trigger an AWS Lambda function based on the item lifecycle activity in an Amazon DynamoDB table.
How can the Developer create the solution?

• A.Enable a DynamoDB stream that publishes an Amazon SNS message. Trigger the Lambda function synchronously from the SNS message.
• B.Enable a DynamoDB stream that publishes an SNS message. Trigger the Lambda function asynchronously from the SNS message.
• C.Enable a DynamoDB stream, and trigger the Lambda function synchronously from the stream.
• D.Enable a DynamoDB stream, and trigger the Lambda function asynchronously from the stream.

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An application ingests a large number of small messages and stores them in a database. The application uses AWS Lambd
a. A development team is making changes to the application's processing logic. In testing, it is taking more than 15 minutes to process each message. The team is concerned the current backend may time out.
Which changes should be made to the backend system to ensure each message is processed in the MOST scalable way1?

• A.Add the messages to an Amazon SQS queue. Set up Amazon EC2 instances in an Auto Scaling group to poll the queue and process the messages as they arrive.
• B.Create a support ticket to increase the Lambda timeout to 60 minutes to allow for increased processing time
• C.Add the messages to an Amazon SQS queue Set up an Amazon EC2 instance to poll the queue and process messages as they arrive.
• D.Change the application to directly insert the body of the message into an Amazon RDS database.

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A legacy service has an XML-based SOAP interface. The Developer wants to expose the functionality of the service to external clients with the Amazon API Gateway. Which technique will accomplish this?

• A.Create a RESTful API with the API Gateway; pass the incoming XML to the SOAP interface through an Application Load Balancer.
• B.Create a RESTful API with the API Gateway; transform the incoming XML into a valid message for the SOAP interface using mapping templates.
• C.Create a RESTful API with the API Gateway; transform the incoming JSON into a valid XML message for the SOAP interface using mapping templates.
• D.Create a RESTful API with the API Gateway; pass the incoming JSON to the SOAP interface through an Application Load Balancer.

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n application running on an Amazon Linux EC2 instance needs to manage the AWS infrastructure.
How can the EC2 instance be configured to make AWS API calls securely?

• A.Sign the AWS CLI command using the signature version 4 process.
• B.Specify a role for the EC2 instance with the necessary privileges.
• C.Pass the access key id and secret access key as parameters for each AWS CLI command.
• D.Run the aws configure AWS CLI command and specify the access key id and secret access key.

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An application is experiencing performance issues based on increased demand. This increased demand is on read-only historical records pulled from an Amazon RDS-hosted database with custom views and queries. A developer improve performance without changing the database structure.
Which approach will improve performance and MINIMIZE management overhead?

• A.Deploy Memcached on Amazon EC2 and cache the data for the application.
• B.Deploy Amazon DynamoDB, move all the data, and point to DynamoDB.
• C.Deploy Amazon ElasticCache for Redis and cache the data for the application.
• D.Deploy Amazon DynamoDB Accelerator (DAX) on Amazon RDS to improve cache performance

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