Which metric will MOST accurately evaluate the performance of this model?

2025-10-02
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In: MLS-C01
With: 1 Comment

A data scientist for a medical diagnostic testing company has developed a machine learning (ML) model to identify patients who have a specific disease.The dataset that the scientist used to train the model is imbalanced.The dataset contains a large number of healthy patients and only a small number of patients who have the disease.The model should consider that patients who are incorrectly identified as positive for the disease will increase costs for the company.Which metric will MOST accurately evaluate the performance of this model?Read More →

When a SysOps Administrator attempts to run the same AWS CloudFormation template in the same AWS account from the console, it fails and returns the error:`The image id `˜[ami-2a69aa47]’ does not exist`What is the MOST likely cause of the failure?

2025-10-02
By:
In: SOA-C01
With: 1 Comment

A developer deploys an application running on Amazon EC2 by using an AWS CloudFormation template.The developer launches the stack from the console logged in as an AWS Identity and Access Management (IAM) user.When a SysOps Administrator attempts to run the same AWS CloudFormation template in the same AWS account from the console, it fails and returns the error:`The image id `˜[ami-2a69aa47]’ does not exist`What is the MOST likely cause of the failure?Read More →

What should the developer do next to meet the requirements?

2025-10-02
By:
In: DVA-C01
With: 1 Comment

A company deploys a new application to AWS.The company is streaming application logs to Amazon CloudWatch Logs.The company’s development team must receive notification by email when the word “ERROR” appears in any log lines.A developer sets up an Amazon Simple Notification Service (Amazon SNS) topic and subscribes the development team to the topic.What should the developer do next to meet the requirements?Read More →

Which of the following is a possible reason that the IAM user cannot access the objects in the S3 bucket?

2025-10-02
By:
In: SCS-C01
With: 1 Comment

An IAM user receives an Access Denied message when the user attempts to access objects in an Amazon S3 bucket.The user and the S3 bucket are in the same AWS account.The S3 bucket is configured to use server-side encryption with AWS KMS keys (SSE-KMS) to encrypt all of its objects at rest by using a customer managed key from the same AWS account.The S3 bucket has no bucket policy defined.The IAM user has been granted permissions through an IAM policy that allows the kms:Decrypt permission to the customer managed key.The IAM policy also allows the s3:List* and s3:Get* permissions for the S3 bucket and its objects.Which of the following is a possible reason that the IAM user cannot access the objects in the S3 bucket?Read More →

What should the solutions architect do to meet these requirements?

2025-10-02
By:
In: SAP-C01
With: 1 Comment

A company is running a workload that consists of thousands of Amazon EC2 instances.The workload is running in a VPC that contains several public subnets and private subnets.The public subnets have a route for 0.0.0.0/0 to an existing internet gateway.The private subnets have a route for 0.0.0.0/0 to an existing NAT gateway.A solutions architect needs to migrate the entire fleet of EC2 instances to use IPv6.The EC2 instances that are in private subnets must not be accessible from the public internet.What should the solutions architect do to meet these requirements?Read More →

What should the DevOps Engineer do to create notifications when issues are discovered?

2025-10-02
By:
In: DOP-C01
With: 1 Comment

An AWS CodePipeline pipeline has implemented a code release process.The pipeline is integrated with AWS CodeDeploy to deploy versions of an application to multiple Amazon EC2 instances for each CodePipeline stage.During a recent deployment, the pipeline failed due to a CodeDeploy issue.The DevOps team wants to improve monitoring and notifications during deployment to decrease resolution times.What should the DevOps Engineer do to create notifications when issues are discovered?Read More →