AWS-DA(171-180)

A business is designing a report that will be performed through AWS Step Functions. Amazon CloudWatch detects issues in the Task State Machine for Step Functions. To debug each operation, the state input must be included in the state output, along with the error message. Which coding technique preserves both the original input and the state error?

A. Use ResultPath in a Catch statement to include the error with the original input.

B. Use InputPath in a Catch statement and set the value to null.

C. Use ErrorEquals in a Retry statement to include the error with the original input.

D. Use OutputPath in a Retry statement and set the value to $.

A company uses AWS CodePipeline to manage continuous integration/continuous delivery (CI/CD) pipelines for its application. Before staging artifacts for testing, a developer must create unit tests and execute them as part of the process. How should the developer implement unit tests into their continuous integration/continuous delivery pipelines?

A. Create a separate CodePipeline pipeline to run unit tests

B. Update the AWS CodeBuild specification to include a phase for running unit tests

C. Install the AWS CodeDeploy agent on an Amazon EC2 instance to run unit tests

D. Create a testing branch in AWS CodeCommit to run unit tests

A status dashboard is shown by an application. A 1 KB message from a SQS queue is used to update the status. Although the status changes seldom, the Developer must keep the time between the message's arrival in the queue and the dashboard update as short as possible. Which strategy results in the smallest delay between dashboard updates?

A. Retrieve the messages from the queue using long polling every 20 seconds.

B. Reduce the size of the messages by compressing them before sending.

C. Retrieve the messages from the queue using short polling every 10 seconds.

D. Reduce the size of each message payload by sending it in two parts.

A firm is introducing the option to save currency (or gift cards) to its very successful casual gaming website. Users must be able to exchange this value for the goods of other users on the site. This would involve either updating both users' information in a single transaction or totally rolling back both users' records. Which AWS database choices provide the needed transactional capabilities for this new feature? (Select two.)

A. Amazon DynamoDB with operations made with the ConsistentRead parameter set to true

B. Amazon ElastiCache for Memcached with operations made within a transaction block

C. Amazon Aurora MySQL with operations made within a transaction block

D. Amazon DynamoDB with reads and writes made using Transact* operations

E. Amazon Redshift with operations made within a transaction block.

On Amazon ECS, a corporation is running a Docker application. The application's load must be scaled depending on the past 15 seconds' user activity. How should a developer instrument code to ensure it satisfies the requirement?

A. Create a high-resolution custom Amazon CloudWatch metric for user activity data, then publish data every 30 seconds

B. Create a high-resolution custom Amazon CloudWatch metric for user activity data, then publish data every 5 seconds

C. Create a standard-resolution custom Amazon CloudWatch metric for user activity data, then publish data every 30 seconds

D. Create a standard-resolution custom Amazon CloudWatch metric for user activity data, then publish data every 5 seconds

A developer must construct an AWS application that will consume Amazon SQS messages ranging in size from 1KB to 1GB. How should Amazon Simple Queue Service (SQS) messages be managed?

A. Use Amazon S3 and the Amazon SQS CLI.

B. Use Amazon S3 and the Amazon SQS Extended Client Library for Java.

C. Use Amazon EBS and the Amazon SQS CLI.

D. Use Amazon EFS and the Amazon SQS CLI.

A developer is using AWS CLI, however it is stalling out when performing list commands on a large number of resources. How can this time-out be avoided?

A. Use pagination

B. Use shorthand syntax

C. Use parameter values

D. Use quoting strings

A developer has developed a Lambda function and is discovering that it is taking longer than planned to execute. The Developer determined that increasing computing capacity might enhance performance after some debugging. What is the best way for the developer to boost Lambda computing resources?

A. Run on a larger instance size with more compute capacity.

B. Increase the maximum execution time.

C. Specify a larger compute capacity when calling the Lambda function.

D. Increase the allocated memory for the Lambda function.

A business builds, bundles, and packages its apps on-premises and stores them locally using a third-party technology. The firm runs its front-end apps on Amazon EC2 instances. How does one deploy an application from the source control system to the EC2 instances?

A. Use AWS CodeDeploy and point it to the local storage to directly deploy a bundle in a .zip, .tar, or .tar.gz format.

B. Upload the bundle to an Amazon S3 bucket and specify the S3 location when doing a deployment using AWS CodeDeploy.

C. Create a repository using AWS CodeCommit to automatically trigger a deployment to the EC2 instances.

D. Use AWS CodeBuild to automatically deploy the latest build to the latest EC2 instances.

A developer is using Amazon API Gateway to create a WebSocket API. The payload submitted to this API is JSON with an action key included. This key may take on one of three values: create, update, or delete. The developer must interact with several routes dependent on the value of the incoming JSON payload's action key. How can the developer execute this operation using the LESS settings possible?

A. Deploy the WebSocket API to three stages for the respective routes: create, update, and remove

B. Create a new route key and set the name as action

C. Set the value of the route selection expression to action

D. Set the value of the route selection expression to $request.body.action