A company is designing a new web application that the company will deploy into a single AWS Region.The application requires a two-tier architecture that will include Amazon EC2 instances and an Amazon RDS DB instance.A solutions architect needs to design the application so that all components are highly available.Which solution will meet these requirements MOST cost-effectively?Read More →
A Data Scientist is developing a binary classifier to predict whether a patient has a particular disease on a series of test results.The Data Scientist has data on400 patients randomly selected from the population.The disease is seen in 3% of the population.Which cross-validation strategy should the Data Scientist adopt?Read More →
A user has created an ELB with the availability zone US-East-1.The user wants to add more zones to ELB to achieve High Availability.How can the user add more zones to the existing ELB?Read More →
Who has the responsibility to patch the host operating system of an Amazon EC2 instance, according to the AWS shared responsibility model?Read More →
A software company is using AWS CodeBuild to build an application.The buildspec runs the application build and creates a Docker image that contains the application.The company needs to push the Docker image to Amazon Elastic Container Registry (Amazon ECR) only upon the completion of each successful build.Which solution meets these requirements?Read More →
A company accidentally deleted the private key for an Amazon Elastic Block Store (Amazon EBS)-backed Amazon EC2 instance.A security engineer needs to regain access to the instance.Which combination of steps will meet this requirement? (Choose two.)Read More →
A company uses AWS CloudFormation to deploy applications within multiple VPCs that are all attached to a transit gateway.Each VPC that sends traffic to the public internet must send the traffic through a shared services VPC.Each subnet within a VPC uses the default VPC route table, and the traffic is routed to the transit gateway.The transit gateway uses its default route table for any VPC attachment.A security audit reveals that an Amazon EC2 instance that is deployed within a VPC can communicate with an EC2 instance that is deployed in any of the company’s other VPCs.A solutions architect needs to limit the traffic between the VPCs.Each VPC must be able to communicate only with a predefined, limited set of authorized VPCs.What should the solutions architect do to meet these requirements?Read More →
A company deploys a new application on three Amazon EC2 instances across three Availability Zones.The company uses a Network Load Balancer (NLB) to route traffic to the EC2 instances.A SysOps administrator must implement a solution so that the EC2 instances allow traffic from only the NLB.What should the SysOps administrator do to meet these requirements with the LEAST operational overhead?Read More →
A DevOps engineer is deploying a new version of a company’s application in an AWS CodeDeploy deployment group associated with its Amazon EC2 instances.After some time, the deployment fails.The engineer realizes that all the events associated with the specific deployment ID are in a Skipped status, and code was not deployed in the instances associated with the deployment group.What are valid reasons for this failure? (Choose two.)Read More →
A company is using Amazon Neptune as the graph database for one of its products.The company’s data science team accidentally created large amounts of temporary information during an ETL process.The Neptune DB cluster automatically increased the storage space to accommodate the new data, but the data science team deleted the unused information.What should a database specialist do to avoid unnecessary charges for the unused cluster volume space?Read More →
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