An application writes items to an Amazon DynamoDB table. As the application scales to thousands of instances, calls to the DynamoDB API generate occasional ThrottlingException errors. The application is coded in a language incompatible with the AWS SDK.
How should the error be handled?

• A.Add exponential backoff to the application logic
• B.Use Amazon SQS as an API message bus
• C.Pass API calls through Amazon API Gateway
• D.Send the items to DynamoDB through Amazon Kinesis Data Firehose

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A Developer must encrypt a 100-GB object using AWS KMS.
What is the BEST approach?

• A.Make a GenerateDataKeyWithoutPlaintext API call that returns an encrypted copy of a data key. Use an encrypted key to encrypt the data
• B.Make an Encrypt API call to encrypt the plaintext data as ciphertext using a customer master key (CMK)
• C.Make a GenerateDataKey API call that returns a plaintext key and an encrypted copy of a data key. Use a plaintext key to encrypt the data
• D.Make an Encrypt API call to encrypt the plaintext data as ciphertext using a customer master key (CMK) with imported key material

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A company maintains an application responsible for processing several thousand external callbacks each day.
The company's System administrators want to know how many callbacks are being received on a rolling basis, and they want this data available for 10 days. The company also wants the ability to issue automated alerts if the number of callbacks exceeds the defined thresholds.
What is the MOST cost-effective way to address the need to track and alert on these statistics?

• A.Push callback data to AWS X-Ray and use AWS Lambda to query, display, and alert on exceeded thresholds.
• B.Push callback data to Amazon CloudWatch as a custom metric and use the CloudWatch alerting mechanisms to alert System Administrators.
• C.Push callback data to Amazon Kinesis Data Streams and invoke an AWS Lambda function that stores data in Amazon DynamoDB and sends the required alerts.
• D.Push callback data to an Amazon RDS database that can be queried to show historical data and to alert on exceeded thresholds.

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A Developer is writing a serverless application that requires that an AWS Lambda function be invoked every
10 minutes.
What is an automated and serverless way to trigger the function?

• A.Create an Amazon CloudWatch Events rule that triggers on a regular schedule to invoke the Lambda function.
• B.Create an Amazon SNS topic that has a subscription to the Lambda function with a 600-second timer.
• C.Configure an environment variable named PERIOD for the Lambda function. Set the value to 600.
• D.Deploy an Amazon EC2 instance based on Linux, and edit its /etc/crontab file by adding a command to periodically invoke the Lambda function.

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A Developer is migrating an on-premises application to AWS. The application currently takes user uploads and saves them to a local directory on the server. All uploads must be saved and made immediately available to all instances in an Auto scaling group.
Which approach will meet these requirements?

• A.Use instance storage and share it between instances launched from the same Amazon machine image (AMI).
• B.Use Amazon EBS and configure the application AMI to use a snapshot of the same EBS instance on boot.
• C.Use Amazon EBS and file synchronization software to achieve eventual consistency among the auto scaling group.
• D.Use Amazon S3 and rearchitect the application so all uploads are placed in S3.

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