Which changes to the CreatePredictor API call could improve the MAPE?

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

A logistics company needs a forecast model to predict next month’s inventory requirements for a single item in 10 warehouses.A machine learning specialist usesAmazon Forecast to develop a forecast model from 3 years of monthly data.There is no missing data.The specialist selects the DeepAR+ algorithm to train a predictor.The predictor means absolute percentage error (MAPE) is much larger than the MAPE produced by the current human forecasters.Which changes to the CreatePredictor API call could improve the MAPE? (Choose two.)Read More →

The CodeDeploy agent’s log file contains the following error message:InvalidSignatureException Signature expired: |time| is now earlier than |time|What is the underlying cause of this issue?

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

A development team uses AWS CodeDeploy to deploy software changes to Amazon EC2 instances.The deployments begin to fail.The team traces the problem to a specific EC2 instance.The CodeDeploy agent’s log file contains the following error message:InvalidSignatureException Signature expired: |time| is now earlier than |time|What is the underlying cause of this issue?Read More →

While the code of the containers is being patched, how can Engineers quickly identify all compromised hosts and stop the egress of data on port 5353?

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

A Security Engineer discovered a vulnerability in an application running on Amazon ECS.The vulnerability allowed attackers to install malicious code.Analysis of the code shows it exfiltrates data on port 5353 in batches at random time intervals.While the code of the containers is being patched, how can Engineers quickly identify all compromised hosts and stop the egress of data on port 5353?Read More →

Which approach should the company take to secure its API?

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

A company is creating a REST API to share information with six of its partners based in the United States.The company has created an Amazon API GatewayRegional endpoint.Each of the six partners will access the API once per day to post daily sales figures.After initial deployment, the company observes 1,000 requests per second originating from 500 different IP addresses around the world.The company believes this traffic is originating from a botnet and wants to secure its API while minimizing cost.Which approach should the company take to secure its API?Read More →

What is the MOST secure solution that will meet these requirements?

2025-10-02
By:
In: SOA-C02
With: 1 Comment

A company has a multi-account environment.Account A has a production application that is hosted on an Amazon EC2 instance.The application needs to query data in an Amazon DynamoDB table that is hosted in Account B.A SysOps administrator needs to provide the EC2 instance in Account A with access to the DynamoDB table in Account B.What is the MOST secure solution that will meet these requirements?Read More →

How can this solution be implemented?

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

A database specialist needs to review and optimize an Amazon DynamoDB table that is experiencing performance issues.A thorough investigation by the database specialist reveals that the partition key is causing hot partitions, so a new partition key is created.The database specialist must effectively apply this new partition key to all existing and new data.How can this solution be implemented?Read More →

Which solution meets these requirements and is the MOST operationally efficient?

2025-10-02
By:
In: SAA-C02
With: 1 Comment

A company wants to move a multi-tiered application from on premises to the AWS Cloud to improve the application’s performance.The application consists of application tiers that communicate with each other by way of RESTful services.Transactions are dropped when one tier becomes overloaded.A solutions architect must design a solution that resolves these issues and modernizes the application.Which solution meets these requirements and is the MOST operationally efficient?Read More →