AWS-DA(161-170)

Images are stored in an S3 bucket by an application. Notifications from Amazon S3 are utilized to invoke a Lambda code that resizes the pictures. Each photograph is processed in less than a second. How will AWS Lambda deal with the increased traffic?

A. Lambda will scale out to execute the requests concurrently.

B. Lambda will handle the requests sequentially in the order received.

C. Lambda will process multiple images in a single execution.

D. Lambda will add more compute to each execution to reduce processing time.

A developer is doing a refactoring operation on a monolithic application. The program does many activities in response to a POST request. Some processes are carried out in concurrently, while others are carried out sequentially. These operations have been decoupled and repurposed as AWS Lambda functions. Amazon API Gateway will process the POST request. How should the developer launch the Lambda functions using API Gateway in the same order?

A. Use Amazon SQS to invoke the Lambda functions

B. Use an AWS Step Functions activity to run the Lambda functions

C. Use Amazon SNS to trigger the Lambda functions

D. Use an AWS Step Functions state machine to orchestrate the Lambda functions

A retailer's developer must include a fraud detection solution into the order processing system. Verification of an order by the fraud detection solution takes between ten and thirty minutes. At its height, the website can process up to 100 orders per minute. How can the fraud detection technology be integrated into the order processing pipeline in the most scalable manner?

A. Add all new orders to an Amazon SQS queue. Configure a fleet of 10 EC2 instances spanning multiple AZs with the fraud detection solution installed on them to pull orders from this queue. Update the order with a pass or fails status.

B. Add all new orders to an SQS queue. Configure an Auto Scaling group that uses the queue depth metric as its unit of scale to launch a dynamically-sized fleet of EC2 instances spanning multiple AZs with the fraud detection solution installed on them to pull orders from this queue. Update the order with a pass or fails status.

C. Add all new orders to an Amazon Kinesis Stream. Subscribe a Lambda function to automatically read batches of records from the Kinesis Stream. The Lambda function includes the fraud detection software and will update the order with a pass or fail status.

D. Write all new orders to Amazon DynamoDB. Configure DynamoDB Streams to include all new orders. Subscribe a Lambda function to automatically read batches of records from the Kinesis Stream. The Lambda function includes the fraud detection software and will update the order with a pass or fail status.

A developer is required to create an application that makes advantage of Amazon DynamoDB. The criteria include that the DynamoDB table's contents must be 7KB in size and that reads must be highly consistent. The read pace is limited to three items per second, whereas the write rate is limited to ten things per second. What size DynamoDB table should the developer create to satisfy these requirements?

A. Read: 3 read capacity units Write: 70 write capacity units

B. Read: 6 read capacity units Write: 70 write capacity units

C. Read: 6 read capacity units Write: 10 write capacity units

D. Read: 3 read capacity units Write: 10 write capacity units

A business has a REST application made up of an Amazon API Gateway API and many AWS Lambda services. A developer is reacting to a warning that the HTTP response error rate for the API Gateway API has suddenly risen. The developer must rapidly discover which Lambda function is misbehaving. Which solution will satisfy these criteria?

A. Implement error handling in the functions to write error logs to the AWS X-Ray API. Use the X-Ray console to query the logs.

B. Enable Amazon CloudWatch Logs and detailed CloudWatch metrics. Use CloudWatch Logs Insights to query the API Gateway logs.

C. Download the API Gateway logs and Lambda invocation logs from Amazon S3. Perform a line-by-line search against them.

D. Export the API Gateway logs and Lambda invocation logs from Amazon EventBridge (Amazon CloudWatch Events) and Amazon CloudWatch Logs. Perform a line-by-line search against them.

An application becomes unresponsive due to the following error: The bucket given does not exist. Where IS THE BEST PLACE TO START THE ANALYSIS OF THE ROOT CAUSES?

A. Check the Elastic Load Balancer logs for DeleteBucket requests.

B. Check the application logs in Amazon CloudWatch Logs for Amazon S3 DeleteBucket errors.

C. Check AWS X-Ray for Amazon S3 DeleteBucket alarms.

D. Check AWS CloudTrail for a DeleteBucket event.

A developer is testing an application that asynchronously executes an AWS Lambda function. The Lambda function fails to process after two retries during the testing phase. How can the developer debug the error?

A. Configure AWS CloudTrail logging to investigate the invocation failures

B. Configure Dead Letter Queues by sending events to Amazon SQS for investigation

C. Configure Amazon Simple Workflow Service to process any direct unprocessed events

D. Configure AWS Config to process any direct unprocessed events

A developer has an on-premises stateful web server that is being transferred to AWS. The developer's flexibility in the new design must be increased. How should the developer approach refactoring the program to increase its elasticity? (Select two.)

A. Use pessimistic concurrency on Amazon DynamoDB

B. Use Amazon CloudFront with an Auto Scaling group

C. Use Amazon CloudFront with an AWS Web Application Firewall

D. Store session state data in an Amazon DynamoDB table

E. Use an ELB with an Auto Scaling group

Amazon API Gateway is being used by a media business to handle microservices configured as AWS Lambda functions. The development team of the corporation intends to release a new version of its API. To prevent impacting current customers when the new API is launched, the firm intends to provide all users a three-month grace period during which they may migrate from the old API to the new API. Which implementation technique should the business utilize to accomplish this objective?

A. Update the Lambda functions. Configure the API to use Lambda proxy integration.

B. Update the Lambda functions. Provide the API client with the new Lambda endpoints.

C. Use API Gateway to deploy a new stage that uses updated Lambda functions and provides users with a new URL.

D. Use API Gateway to redirect requests based on a request header to updated Lambda functions. Configure a 90-day expiration on the old API.

A business wishes to establish continuous integration for its AWS workloads. The firm wishes to activate unit tests in its pipeline in response to updates to its code repository and to be alerted of pipeline failure events. How are these stipulations to be met?

A. Store the source code in AWS CodeCommit. Create a CodePipeline to automate unit testing. Use Amazon SNS to trigger notifications of failure events.

B. Store the source code in GitHub. Create a CodePipeline to automate unit testing. Use Amazon SES to trigger notifications of failure events.

C. Store the source code on GitHub. Create a CodePipeline to automate unit testing. Use Amazon CloudWatch to trigger notifications of failure events.

D. Store the source code in AWS CodeCommit. Create a CodePipeline to automate unit testing. Use Amazon CloudWatch to trigger notification of failure events.