AOS_TEMA3_EC3_2024

A developer is building a microservices-based application using Amazon EC2 instances. The application uses multiple APIs and requires low-latency communication between the microservices hosted in different EC2 instances. Which option should the developer implement to optimize performance?

• Use an Application Load Balancer to route traffic between the services.
• Use AWS Lambda to replace EC2 instances for inter-service communication.
• Use an Auto Scaling group to ensure scalability of the services.
• Prioritize the scalability within the availability zone.

An organization wants to host a legacy application on Amazon EC2 instance. The application requires persistent storage for its stateful components. The application needs high availability, data durability, and low-latency disk performance. What should the Solutions Architect recommend?

• Use Amazon EBS General Purpose SSD (gp3) volumes.
• Use Amazon EC2 instance store volumes.
• Use Amazon S3 for persistent storage.
• Use Amazon EFS for application data.

A DevOps engineer is managing an EC2 Auto Scaling group hosting a CI/CD pipeline. The pipeline occasionally experiences delays because of inconsistent performance during scaling activities. How can the engineer improve the consistency of the environment during scale-in and scale-out events?

• Use Spot Instances in the Auto Scaling group for cost efficiency.
• Configure lifecycle hooks to run custom scripts during instance launch and termination.
• Use Reserved Instances for the Auto Scaling group to stabilize capacity.
• Enable instance refresh for the Auto Scaling group.

A developer is managing a web application hosted on Amazon EC2 instances. The application experiences unpredictable traffic spikes. The developer needs to ensure the application can handle high traffic while minimizing costs. Which solution is most appropriate?

• Manually monitor traffic and launch new EC2 instances as needed.
• Use an Auto Scaling group to automatically adjust the number of EC2 instances based on demand.
• Deploy the application using Amazon S3 for hosting.
• Use Amazon EC2 Spot Instances for all traffic demands.

A solutions architect is designing an application hosted on Amazon EC2 instances. The application must be highly available and resilient to regional failures. What design should the solutions architect implement?

• Deploy EC2 instances in a single Availability Zone and use an Application Load Balancer.
• Deploy EC2 instances across multiple Availability Zones within a single Region and use an Application Load Balancer.
• Deploy EC2 instances in multiple Regions without load balancing.
• Deploy EC2 instances in a single Region and use Amazon CloudFront to distribute traffic.

A DevOps engineer is tasked with implementing a continuous deployment pipeline for a web application running on Amazon EC2 instances. The pipeline must ensure that infrastructure is immutable during deployments. What solution should the engineer use?

• Perform in-place updates on EC2 instances using AWS CodeDeploy.
• Use AWS CloudFormation to deploy new EC2 instances and terminate old instances.
• Deploy new application versions to the same EC2 instances using Amazon Elastic Beanstalk.
• Manually create and test new EC2 instances for every deployment.

Which method should the developer use to provide secure access to the S3 bucket from the EC2 instances?

• Store the credentials in environment variables on the EC2 instances.
• Use IAM roles with appropriate permissions and attach them to the EC2 instances.
• Embed the credentials directly in the application code.
• Use AWS Secrets Manager to store and retrieve credentials.

A solutions architect is designing a scalable web application that will run on Amazon EC2 instances behind an Elastic Load Balancer (ELB). The application must handle unpredictable traffic spikes and be High Available. Which architecture will best meet these requirements?

• Use a single large EC2 instance behind an ELB.
• Use multiple smaller EC2 instances behind an ELB with Auto Scaling with a minimum of 2 instances.
• Use a single large EC2 instance with Auto Scaling.
• Use multiple smaller EC2 instances without an ELB.

A DevOps engineer needs to deploy a new version of an application running on Amazon EC2 instances with zero downtime. The application is behind an Application Load Balancer (ALB). Which deployment strategy should be used to achieve this?

• Blue/Green deployment using separate environments
• In-place update of all EC2 instances.
• Manual update of each instance one at a time.
• Rolling update without any load balancer.

A DevOps engineer is tasked with implementing a CI/CD pipeline for an application running on Amazon EC2 instances. The pipeline should automatically deploy new application versions to the EC2 instances whenever changes are made to the code repository. Which combination of services should the engineer use to achieve this?

• AWS CodeCommit, AWS CodeBuild, and AWS CodeDeploy.
• AWS CodePipeline, AWS Lambda, and Amazon S3.
• AWS CodeBuild, AWS CodePipeline, and Amazon CloudWatch.
• AWS CodeDeploy, AWS CloudFormation, and Amazon EC2.