You have written an application that uses the Elastic Load Balancing service to spread traffic to several web servers. Your users complain that they are sometimes forced to login again in the middle of using your application, after they have already logged in. This is not behavior you have designed.
What is a possible solution to prevent this happening?

• A.Use instance memory to save session state.
• B.Use instance storage to save session state.
• C.Use EBS to save session state
• D.Use ElastiCache to save session state.
• E.Use Glacier to save session slate.

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If a message is retrieved from a queue in Amazon SQS, how long is the message inaccessible to other users by default?

• A.0 seconds
• B.1 hour
• C.1 day
• D.forever
• E.30 seconds

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A company has an application that logs all information to Amazon S3. Whenever there is a new log file, an AWS Lambda function is invoked to process the log files. The code works, gathering all of the necessary information. However, when checking the Lambda function logs, duplicate entries with the same request ID are found.
What is causing the duplicate entries?

• A.The S3 bucket name was specified incorrectly.
• B.The Lambda function failed, and the Lambda service retired the invocation with a delay.
• C.There was an S3 outage, which caused duplicate entries of the sale log file.
• D.The application stopped intermittently and then resumed.

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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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A Developer is investigating an issue whereby certain requests are passing through an Amazon API Gateway endpoint /MyAPI, but the requests do not reach the AWS Lambda function backing /MyAPI. The Developer found that a second Lambda function sometimes runs at maximum concurrency allowed for the given AWS account.
How can the Developer address this issue?

• A.Reduce the throttling limits in the API Gateway /MyAPI endpoint
• B.Add another API Gateway stage for /MyAPI, and shard the requests
• C.Configure the second Lambda function's concurrency execution limit
• D.Manually reduce the concurrent execution limit at the account level

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