Free Amazon DOP-C02 Exam Questions

Question 1

A company is developing a web application that runs on Amazon EC2 Linux instances. The application requires monitoring of custom performance metrics. The company must collect metrics for API response times and database query latency across multiple instances. Which solution will generate the custom metrics with the LEAST operational overhead?

A : Install the Amazon CloudWatch agent on the instances. Configure the agent to collect the custom metrics. Instrument the application to send the metrics to the agent.

B : Use Amazon Managed Service for Prometheus to scrape the custom metrics from the application. Use the Amazon CloudWatch agent to forward the metrics to CloudWatch.

C : Create a custom AWS Lambda function that polls the application endpoints and database at regular intervals. Program the Lambda function to calculate the custom metrics and to send the metrics to Amazon CloudWatch by using PutMetricData API calls.

D : Implement custom logging in the application code to record the custom metrics. Use Amazon CloudWatch Logs Insights to extract and analyze the metrics.

Answer: A

Question 2

You are working on a web application that allows designers to create mobile themes for their android phones. The app is hosted on a cluster of Auto Scaling ECS instances and its deployments are handled by AWS CodeDeploy. ALB health checks are not sufficient to tell that new version deployments are successful, rather you have custom validation scripts that verify all APIs of the application. You want to make sure that there are no 5XX error replies on the new version before continuing production deployment and that you are notified via email if results failed. You also want to configure automatic rollback to the older version when the validation fails.

Which combination of options should you implement to meet this requirement? (Select THREE.)

A : ociate CloudWatch Alarms to your deployment group to have it trigger a rollback when the 5xx error alarm is active.

B : eate your validation scripts on AWS Lambda and invoke them after deployment to validate your new app version.

C : ve AWS CloudWatch Alarms trigger an AWS SNS notification when the threshold for 5xx is reached on CloudWatch.

D : ve Lambda send results to AWS CloudWatch Alarms directly and trigger a rollback when 5xx reply errors are received during deployment.

E : ve AWS Lambda trigger an AWS SNS notification after performing the validation of the new app revision.

F : eate your validation scripts on AWS Lambda and define the functions on the AppSpec lifecycle hook to validate the app using test traffic.

Answer: A,C

Question 3

A development team manually builds a local artifact. The development team moves the artifact to an Amazon S3 bucket to support an application. The application has a local cache that must be cleared when the development team deploys the application to Amazon EC2 instances. For each deployment, the development team runs a command to clear the cache, download the artifact from the S3 bucket, and unzip the artifact to complete the deployment. The development team wants to migrate the deployment process to a CI/CD process and to track the progress of each deployment. Which combination of actions will meet these requirements with the MOST operational efficiency? (Select THREE.)

A : Set up an AWS CodeConnections compatible Git repository. Allow developers to merge code into the repository. Use AWS CodeBuild to build an artifact and copy the object into the S3 bucket. Configure CodeBuild to run for every merge into the main branch.

B : Create a custom script to clear the cache. Specify the script in the BeforeInstall lifecycle hook in the AppSpec file.

C : Create user data for each EC2 instance that contains the cache clearing script. Test the application after deployment. If the deployment is not successful, then redeploy.

D : Use AWS CodePipeline to deploy the application. Set up an AWS CodeConnections compatible Git repository. Allow developers to merge code into the repository as a source for the pipeline.

E : Use AWS CodeBuild to build the artifact and place the artifact in the S3 bucket. Use AWS CodeDeploy to deploy the artifact to EC2 instances.

F : Use AWS Systems Manager to fetch the artifact from the S3 bucket and to deploy the artifact to all the EC2 instances.

Answer: B,D,E

Question 4

A DevOps engineer needs a resilient CI/CD pipeline that builds container images, stores them in ECR, scans images for vulnerabilities, and is resilient to outages in upstream source image repositories. Which solution meets this?

A : Create a private ECR repo, scan images on push, replicate images from upstream repos with a replication rule.

B : Create a private ECR repo, scan images on push, replicate images from upstream repos with a replication rule

C : Create a public ECR repo, configure a pull-through cache rule, create a private repo to store images, enable basic scanning.

D : Create a private ECR repo, enable basic scanning, create a pull-through cache rule.

Answer: D

Question 5

A company has a web application that is hosted on Amazon EC2 instances. The company is deploying the application into multiple AWS Regions. The application consists of dynamic content such as WebSocket-based real-time product updates. The company uses Amazon Route 53 to manage all DNS records. Which solution will provide multi-Region access to the application with the LEAST latency?

A : Deploy an Application Load Balancer (ALB) in front of the EC2 instances in each Region. Create a Route 53 A record with a latency-based routing policy. Add IP addresses of the ALBs as the value of the record.

B : Deploy an Application Load Balancer (ALB) in front of the EC2 instances in each Region. Deploy an Amazon CloudFront distribution with an origin group that contains the ALBs as origins. Create a Route 53 alias record that points to the CloudFront distribution's DNS address.

C : Deploy a Network Load Balancer (NLB) in front of the EC2 instances in each Region. Create a Route 53 A record with a multivalue answer routing policy. Add IP addresses of the NLBs as the value of the record.

D : Deploy a Network Load Balancer (NLB) in front of the EC2 instances in each Region. Deploy an AWS Global Accelerator standard accelerator with an endpoint group for each NLB. Create a Route 53 alias record that points to the accelerator's DNS address.

Answer: A