Which methods can the Data Scientist use to improve the model performance and satisfy the Marketing team’s needs?

2026-04-03
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In: MLS-C01
With: 2 Comments

A Data Scientist is building a model to predict customer churn using a dataset of 100 continuous numerical features.The Marketing team has not provided any insight about which features are relevant for churn prediction.The Marketing team wants to interpret the model and see the direct impact of relevant features on the model outcome.While training a logistic regression model, the Data Scientist observes that there is a wide gap between the training and validation set accuracy.Which methods can the Data Scientist use to improve the model performance and satisfy the Marketing team’s needs? (Choose two.)Read More →

What is likely causing the timeouts?

2026-04-03
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In: DBS-C01
With: 2 Comments

A database specialist deployed an Amazon RDS DB instance in Dev-VPC1 used by their development team.Dev-VPC1 has a peering connection with Dev-VPC2 that belongs to a different development team in the same department.The networking team confirmed that the routing between VPCs is correct; however, the database engineers in Dev-VPC2 are getting a timeout connections error when trying to connect to the database in Dev-VPC1.What is likely causing the timeouts?Read More →

Which solution will meet these requirements without affecting the current deployment method?

2026-04-03
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In: DOP-C01
With: 2 Comments

An application is deployed on Amazon EC2 instances running in an Auto Scaling group.During the bootstrapping process, the instances register their private IP addresses with a monitoring system.The monitoring system performs health checks frequently by sending ping requests to those IP addresses and sending alerts if an instance becomes non-responsive.The existing deployment strategy replaces the current EC2 instances with new ones.A DevOps Engineer has noticed that the monitoring system is sending false alarms during a deployment, and is tasked with stopping these false alarms.Which solution will meet these requirements without affecting the current deployment method?Read More →

Which routing policy should a SysOps administrator apply to the Route 53 record set to meet these requirements?

2026-04-03
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In: SOA-C02
With: 2 Comments

A company hosts its website in the us-east-1 Region.The company is preparing to deploy its website into the eu-central-1 Region.Website visitors who are located in Europe should access the website that is hosted in eu-central-1.All other visitors access the website that is hosted in us-east-1.The company uses Amazon Route 53 to manage the website’s DNS records.Which routing policy should a SysOps administrator apply to the Route 53 record set to meet these requirements?Read More →

Which steps should the solutions architect take to meet these requirements?

2026-04-03
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In: SAP-C01
With: 2 Comments

A solutions architect is building a web application that uses an Amazon RDS for PostgreSQL DB instance.The DB instance is expected to receive many more reads than writes.The solutions architect needs to ensure that the large amount of read traffic can be accommodated and that the DB instance is highly available.Which steps should the solutions architect take to meet these requirements? (Choose three.)Read More →

Which strategy should the solutions architect provide to meet these requirements?

2026-04-03
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In: SAP-C02
With: 2 Comments

A large company recently experienced an unexpected increase in Amazon RDS and Amazon DynamoDB costs.The company needs to increase visibility into details of AWS Billing and Cost Management.There are various accounts associated with AWS Organizations, including many development and production accounts.There is no consistent tagging strategy across the organization, but there are guidelines in place that require all infrastructure to be deployed using AWS CloudFormation with consistent tagging.Management requires cost center numbers and project ID numbers for all existing and future DynamoDB tables and RDS instances.Which strategy should the solutions architect provide to meet these requirements?Read More →

Which solution should the developer implement to meet these requirements?

2026-04-03
By:
In: DVA-C01
With: 2 Comments

A company is using Amazon Cognito user pools for sign-up and login functionality for a web application.The company is using Amazon RDS for the application’s data persistence and is using Amazon API Gateway and AWS Lambda for the application’s API functionality.Users must provide their first name, last name, email address, and phone number to sign up.All API endpoints have a Cognito user pool authorizer to guard against unauthenticated requests.A developer wants to show a personalized welcome screen to users after they log in.The welcome screen needs to show the user’s first name and the user’s previous login date.According to company policy, developers who work on the web application cannot store any personally identifiable information in RDS instances.Which solution should the developer implement to meet these requirements?Read More →