Desarrollador prueba 2

A developer is troubleshooting an application on EC2 that writes logs to CloudWatch Logs. The company needs to receive SNS notifications when the number of error messages exceeds a defined threshold in a 5‑minute period. Which solution meets these requirements?

• Rewrite the application to stream logs directly to SNS.
• Configure a subscription filter on the CloudWatch Logs group to trigger SNS notifications.
• Install Amazon Inspector on the EC2 instances and configure it to send SNS notifications.
• Create a CloudWatch metric filter to detect error patterns; set up a CloudWatch alarm on the metric; configure the alarm to send an SNS notification.

A developer registers a Lambda function as a target for an Application Load Balancer (ALB) using the CLI, but the function is not invoked when requests are sent through the ALB.

• Lambda functions cannot be registered as ALB targets.
• Lambda functions can only be registered via the AWS Console.
• The permissions to invoke the Lambda function are missing.
• Cross‑zone load balancing is not enabled on the ALB.

A company wants to deploy static websites on AWS with phased releases (development, staging, UAT, production) triggered by code merges from various version control systems (CodeCommit, Bitbucket, GitHub), ensuring HTTPS sin servidores en ejecución continua. Which solution meets these requirements with minimal operational overhead?

• Use AWS Amplify with a serverless backend, connecting repository branches to the respective environments, and trigger deployments via code merges.
• Deploy each website using AWS Elastic Beanstalk with multiple environments linked via the EB CLI and automate deployments using CodePipeline.
• Host each website in separate Amazon S3 buckets for each environment, with deployments managed by CodePipeline and CodeBuild.
• Deploy each website on individual Amazon EC2 instances using custom deployment scripts triggered by code merges.

A company is building a web application that generates reports on demand. Reports are available within one hour, remain accessible for 8 hours, and are deleted after 2 days. Which solution meets these requirements with minimal operational overhead?

• Generate reports and store them as items in DynamoDB with TTL; generate a URL for retrieval.
• Generate reports and store them in an S3 bucket with server‑side encryption; generate presigned URLs; add S3 Lifecycle rules to delete reports older than 2 days.
• Generate reports and store them in an RDS database; generate a URL for retrieval; schedule a Lambda function to delete old records.
• Generate reports and store them in an RDS database; attach reports to SNS messages and notify customers.

A developer is creating an application that processes transaction data asynchronously with a Lambda function. The application sometimes fails, and the developer wants a second Lambda function to be invoked automatically to handle errors and log details when a failure occurs.

• Configure a Lambda function destination for failures; specify the error-handling Lambda function’s ARN.
• Enable AWS X‑Ray tracing and have the function send stack traces to a second Lambda function.
• Configure a Lambda function trigger with a failure condition; specify the error-handling function’s ARN.
• Create a CloudWatch alarm that triggers the error-handling Lambda function when failures occur.

A company receives food orders from various partners through a microservices architecture using API Gateway and AWS Lambda. Each partner calls a customized API that triggers a shared Lambda function to process orders. Partners must be notified only for their own orders, and the solution should allow easy addition of new partners with minimal code changes. Which approach is the most scalable?

• Create separate SNS topics for each partner and have the Lambda function publish order updates to the respective SNS topic.
• Develop distinct Lambda functions for each partner to send notifications directly to their service endpoints.
• Create a single SNS topic, have the Lambda function publish messages with partner‑specific attributes, and subscribe each partner with an SNS filter policy to receive only their messages.
• Use a single SNS topic and subscribe all partners to it without filtering.

A developer is processing clickstream data using Amazon Kinesis Data Streams. The data experiences periodic spikes, and PutRecords API calls sometimes fail with capacity errors. Which techniques will help mitigate these exceptions? (Choose two.)

• Implement retries with exponential backoff.
• Use a PutRecord API instead of PutRecords.
• Reduce the frequency and/or size of the requests.
• Use Amazon SNS instead of Kinesis.
• Reduce the number of KCL consumers.

A company is migrating its legacy database to Amazon Aurora PostgreSQL. The company requires that database credentials be stored securely and rotated automatically without extra programming overhead. Which solution meets these requirements?

• Use IAM database authentication for token-based access.
• Store the credentials in AWS Secrets Manager and enable automatic rotation.
• Store the credentials in AWS Systems Manager Parameter Store and manually rotate them.
• Use an on‑premises HSM to generate and manage credentials.

 An application running in an EC2 Auto Scaling group experiences long instance startup times due to a slow‑running UserData script. The solution must ensure that instances become available quickly, always run the latest validated application version with all security patches, and minimize the number of images created. Which two steps should be taken?

• Use EC2 Image Builder to create an AMI with all required patches and agents, and update the Auto Scaling launch configuration to use this AMI.

• Use EC2 Image Builder to create an AMI with the latest application version and patches, and update the Auto Scaling launch configuration to use this AMI.

• Set up AWS CodeDeploy to deploy the latest application version at runtime.

• Set up AWS CodePipeline to deploy the latest application version at runtime.

• Remove OS patching commands from the UserData script.

A business operates Amazon EC2 instances across several AWS accounts. A developer is tasked with creating an application that aggregates lifecycle events from these instances. These events must be consolidated into a single Amazon SQS queue in the primary AWS account for further processing.

• Set up Amazon EC2 to forward lifecycle events from every account to the primary account’s EventBridge event bus. Then, create an EventBridge rule in that bus to capture all lifecycle events, using the SQS queue as the designated target.

• Apply resource policies on the main account’s SQS queue to grant write permissions to each account. In each account’s EventBridge event bus, set up a rule that filters for EC2 lifecycle events and directs them to the SQS queue in the primary account.

• Develop an AWS Lambda function that periodically reviews all EC2 instances across accounts to detect lifecycle changes, sending a notification to the SQS queue in the main account whenever a change is found. A scheduled EventBridge rule triggers this function every minute.

• Adjust the primary account’s event bus permissions to accept events from other accounts. In every account, establish an EventBridge rule to forward all EC2 lifecycle events to the main account’s event bus. Finally, in the main account, create an EventBridge rule that filters these events and designates the SQS queue as its target.