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A company is expanding the compatibility of its photo-snaring mobile app to hundreds of additional devices with unique screen dimensions and resolutions. Photos are stored in Amazon S3 in their original format and resolution. The company uses an AmazonCloudFront distribution to serve the photos The app includes the dimension and resolution of the display as GET parameters with every request.

A developer needs to implement a solution that optimizes the photos that are served to each device to reduce load time and increase photo quality.

Which solution will meet these requirements MOST cost-effective?

A.

Use S3 Batch Operations to invoke an AWS Lambda function to create new variants of the photos with the required dimensions and resolutions. Create a dynamic CloudFront origin that automatically maps the request of each device to the corresponding photo variant.

B.

Use S3 Batch Operations to invoke an AWS Lambda function to create new variants of the photos with the required dimensions and resolutions. Create a Lambda@Edge function to route requests to the corresponding photo vacant by using request headers.

C.

Create a Lambda@Edge function that optimizes the photos upon request and returns the photos as a response. Change the CloudFront TTL cache policy to the maximum value possible.

D.

Create a Lambda@Edge function that optimizes the photos upon request and returns the photos as a response. In the same function store a copy of the processed photos on Amazon S3 for subsequent requests.

A developer is creating an application that will store personal health information (PHI). The PHI needs to be encrypted at all times. An encrypted Amazon RDS for MySQL DB instance is storing the data. The developer wants to increase the performance of the application by caching frequently accessed data while adding the ability to sort or rank the cached datasets.

Which solution will meet these requirements?

A.

Create an Amazon ElastiCache for Redis instance. Enable encryption of data in transit and at rest. Store frequently accessed data in the cache.

B.

Create an Amazon ElastiCache for Memcached instance. Enable encryption of data in transit and at rest. Store frequently accessed data in the cache.

C.

Create an Amazon RDS for MySQL read replica. Connect to the read replica by using SSL. Configure the read replica to store frequently accessed data.

D.

Create an Amazon DynamoDB table and a DynamoDB Accelerator (DAX) cluster for the table. Store frequently accessed data in the DynamoDB table.

A developer is creating an ecommerce workflow in an AWS Step Functions state machine that includes a HTTP Task state. The task passes shipping information and order details to an endpoint.

The developer needs to test the workflow to confirm that the HTTP headers and body are correct and that the responses meet expectations.

A.

Use the TestState API to invoke only the HTTP Task. Set the inspection level to TRACE.

B.

Use the TestState API to invoke the state machine. Set the inspection level to DEBUG.

C.

Use the data flow simulator to invoke only the HTTP Task. View the request and response data.

D.

Change the log level of the state machine to ALL. Run the state machine.

A company caches session information for a web application in an Amazon DynamoDB table. The company wants an automated way to delete old items from the table.

What is the simplest way to do this?

A.

Write a script that deletes old records; schedule the script as a cron job on an Amazon EC2 instance.

B.

Add an attribute with the expiration time; enable the Time To Live feature based on that attribute.

C.

Each day, create a new table to hold session data; delete the previous day's table.

D.

Add an attribute with the expiration time; name the attribute ItemExpiration.

A company uses Amazon DynamoDB as a data store for its order management system. The company frontend application stores orders in a DynamoDB table. The DynamoDB table is configured to send change events to a DynamoDB stream. The company uses an AWS Lambda function to log and process the incoming orders based on data from the DynamoDB stream.

An operational review reveals that the order quantity of incoming orders is sometimes set to 0. A developer needs to create a dashboard that will show how many unique customers this problem affects each day.

What should the developer do to implement the dashboard?

A.

Grant the Lambda function's execution role permissions to upload logs to Amazon CloudWatch Logs. Implement a CloudWatch Logs Insights query that selects the number of unique customers for orders with order quantity equal to 0 and groups the results in 1-day periods. Add the CloudWatch Logs Insights query to a CloudWatch dashboard.

B.

Use Amazon Athena to query AWS CtoudTrail API logs for API calls. Implement an Athena query that selects the number of unique customers for orders with order quantity equal to 0 and groups the results in 1-day periods. Add the Athena query to an Amazon CloudWatch dashboard.

C.

Configure the Lambda function to send events to Amazon EventBridge. Create an EventBridge rule that groups the number of unique customers for orders with order quantity equal to 0 in 1-day periods. Add a CloudWatch dashboard as the target of the rule.

D.

Turn on custom Amazon CloudWatch metrics for the DynamoDB stream of the DynamoOB table. Create a CloudWatch alarm that groups the number of unique customers for orders with order quantity equal to 0 in 1-day periods. Add the CloudWatch alarm to a CloudWatch dashboard.

A developer is using an AWS CloudFormation template to create a pipeline in AWS CodePipeline. The template creates an Amazon S3 bucket that the pipeline references in a source stage. The template also creates an AWS CodeBuild project for a build stage. The pipeline sends notifications to an Amazon SNS topic. Logs for the CodeBuild project are stored in Amazon CloudWatch Logs.

The company needs to ensure that the pipeline's artifacts are encrypted with an existing customer-managed AWS KMS key. The developer has granted the pipeline permissions to use the KMS key.

Which additional step will meet these requirements?

A.

Create an Amazon S3 gateway endpoint that the pipeline can access.

B.

In the CloudFormation template, use the KMS key to encrypt the logs in CloudWatch Logs.

C.

Apply an S3 bucket policy that ensures the pipeline sends only encrypted objects to the S3 bucket.

D.

Configure the notification topic to use the existing KMS key to enable encryption with the existing KMS key.

A developer has observed an increase in bugs in the AWS Lambda functions that a development team has deployed in its Node.js application.

To minimize these bugs, the developer wants to implement automated testing of Lambda functions in an environment that closely simulates the Lambda environment.

The developer needs to give other developers the ability to run the tests locally. The developer also needs to integrate the tests into the team's continuous integration and continuous delivery (CI/CD) pipeline before the AWS Cloud Development Kit (AWS CDK) deployment.

Which solution will meet these requirements?

A.

Create sample events based on the Lambda documentation. Create automated test scripts that use the cdk local invoke command to invoke the Lambda functions. Check the response. Document the test scripts for the other developers on the team. Update the CI/CD pipeline to run the test scripts.

B.

Install a unit testing framework that reproduces the Lambda execution environment. Create sample events based on the Lambda documentation. Invoke the handler function by using a unit testing framework. Check the response. Document how to run the unit testing framework for the other developers on the team. Update the CI/CD pipeline to run the unit testing framework.

C.

Install the AWS Serverless Application Model (AWS SAM) CLI tool. Use the sam local generate-event command to generate sample events for the automated tests. Create automated test scripts that use the sam local invoke command to invoke the Lambda functions. Check the response. Document the test scripts for the other developers on the team. Update the CI/CD pipeline to run the test scripts.

D.

Create sample events based on the Lambda documentation. Create a Docker container from the Node.js base image to invoke the Lambda functions. Check the response. Document how to run the Docker container for the other developers on the team. Update the CllCD pipeline to run the Docker container.

A data visualization company wants to strengthen the security of its core applications The applications are deployed on AWS across its development staging, pre-production, and production environments. The company needs to encrypt all of its stored sensitive credentials The sensitive credentials need to be automatically rotated Aversion of the sensitive credentials need to be stored for each environment

Which solution will meet these requirements in the MOST operationally efficient way?

A.

Configure AWS Secrets Manager versions to store different copies of the same credentials across multiple environments

B.

Create a new parameter version in AWS Systems Manager Parameter Store for each environment Store the environment-specific credentials in the parameter version.

C.

Configure the environment variables in the application code Use different names for each environment type

D.

Configure AWS Secrets Manager to create a new secret for each environment type. Store the environment-specific credentials in the secret

A company notices that credentials that the company uses to connect to an external software as a service (SaaS) vendor are stored in a configuration file as plaintext.

The developer needs to secure the API credentials and enforce automatic credentials rotation on a quarterly basis.

Which solution will meet these requirements MOST securely?

A.

Use AWS Key Management Service (AWS KMS) to encrypt the configuration file. Decrypt the configuration file when users make API calls to the SaaS vendor. Enable rotation.

B.

Retrieve temporary credentials from AWS Security Token Service (AWS STS) every 15 minutes. Use the temporary credentials when users make API calls to the SaaS vendor.

C.

Store the credentials in AWS Secrets Manager and enable rotation. Configure the API to have Secrets Manager access.

D.

Store the credentials in AWS Systems Manager Parameter Store and enable rotation. Retrieve the credentials when users make API calls to the SaaS vendor.

A company is creating an AWS Step Functions state machine to run a set of tests for an application. The tests need to run when a specific AWS Cloud Formation stack is deployed.

Which combination of steps will meet these requirements? (Select TWO.)

A.

Create an AWS Lambda function to invoke the state machine.

B.

Create an Amazon EventBridge rule on the default bus that matches on a detail type of CloudFormation stack status change, a status of UPDATE_IN_PROGRESS, and the stack ID of the CloudFormation stack.

C.

Create a pipe in Amazon EventBridge Pipes that has a source of the default event bus. Set the Lambda function as a target. Filter on a detail type of CloudFormation stack status change, a status of UPDATE_IN_PROGRESS, and the stack ID of the CloudFormation stack.

D.

Create a pipe in Amazon EventBridge Pipes that has a source of the EventBridge rule. Set the state machine as a target.

E.

Add the state machine as a target of the EventBridge rule.