A Developer is designing a fault-tolerant environment where client sessions will be saved.
How can the Developer ensure that no sessions are lost if an Amazon EC2 instance fails?

• A.Use Elastic Load Balancer connection draining to stop sending requests to failing instances.
• B.Use sticky sessions with an Elastic Load Balancer target group.
• C.Use Amazon SQS to save session data.
• D.Use Amazon DynamoDB to perform scalable session hadling.

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A company is running an application on AWS Elastic Beanstalk in a single-instance environment The company's deployments must avoid any downtime Which deployment option will meet these requirements'?

• A.All at once
• B.Rolling
• C.Immutable
• D.Rolling with additional batch

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A Developer is working on an application that tracks hundreds of millions of product reviews in an Amazon DynamoDB table. The records include the data elements shown in the table:

Which field, when used as the partition key, would result in the MOST consistent performance using DynamoDB?

• A.starRating
• B.reviewID
• C.comment
• D.productID

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An application takes 40 seconds to process instructions received in an Amazon SQS message.
Assuming the SQS queue is configured with the default VisibilityTimeout value, what is the BEST way, upon receiving a message, to ensure that no other instances can retrieve a message that has already been processed or is currently being processed?

• A.Use the ChangeMessageVisibility API to increase the VisibilityTimeout, then use the DeleteMessage API to delete the message.
• B.Use the DeleteMessage API call to delete the message from the queue, then call DeleteQueue API to remove the queue.
• C.Use the ChangeMessageVisibility API to decrease the timeout value, then use the DeleteMessage API to delete the message.
• D.Use the DeleteMessageVisibility API to cancel the VisibilityTimeout, then use the DeleteMessage API to delete the message.

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A Lambda function is packaged for deployment to multiple environments, including development, test, production, etc. Each environment has unique set of resources such as databases, etc.
How can the Lambda function use the resources for the current environment?

• A.Hardcore resources in the source code.
• B.Use separate function for development and production.
• C.Use environment variables for the Lambda functions.
• D.Apply tags to the Lambda functions.

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