AWS DevOps Engineer - Professional

Here you have the best Amazon DOP-C01 practice exam questions

You have 208 total questions to study from
Each page has 5 questions, making a total of 42 pages
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This questions were last updated on December 25, 2024

Question 1 of 208

A company wants to migrate its content sharing web application hosted on Amazon EC2 to a serverless architecture. The company currently deploys changes to its application by creating a new Auto Scaling group of EC2 instances and a new Elastic Load Balancer, and then shifting the traffic away using an Amazon Route

53 weighted routing policy.

For its new serverless application, the company is planning to use Amazon API Gateway and AWS Lambda. The company will need to update its deployment processes to work with the new application. It will also need to retain the ability to test new features on a small number of users before rolling the features out to the entire user base.

Which deployment strategy will meet these requirements?

Use AWS CDK to deploy API Gateway and Lambda functions. When code needs to be changed, update the AWS CloudFormation stack and deploy the new version of the APIs and Lambda functions. Use a Route 53 failover routing policy for the canary release strategy.

Use AWS CloudFormation to deploy API Gateway and Lambda functions using Lambda function versions. When code needs to be changed, update the CloudFormation stack with the new Lambda code and update the API versions using a canary release strategy. Promote the new version when testing is complete.

Use AWS Elastic Beanstalk to deploy API Gateway and Lambda functions. When code needs to be changed, deploy a new version of the API and Lambda functions. Shift traffic gradually using an Elastic Beanstalk blue/green deployment.

Use AWS OpsWorks to deploy API Gateway in the service layer and Lambda functions in a custom layer. When code needs to be changed, use OpsWorks to perform a blue/green deployment and shift traffic gradually.

Correct Answer: B

To migrate a content sharing web application to a serverless architecture using Amazon API Gateway and AWS Lambda, and to retain the ability to test new features on a small number of users before rolling the features out to the entire user base, the best strategy is to use AWS CloudFormation to deploy API Gateway and Lambda functions with Lambda function versions. When code needs to be changed, updating the CloudFormation stack with the new Lambda code and using a canary release strategy allows for promoting the new version once testing is complete, which satisfies the requirements for controlled feature rollouts and minimizes disruption.

Question 2 of 208

A company's application is currently deployed to a single AWS Region. Recently, the company opened a new office on a different continent. The users in the new office are experiencing high latency. The company's application runs on Amazon EC2 instances behind an Application Load Balancer (ALB) and uses Amazon

DynamoDB as the database layer. The instances run in an EC2 Auto Scaling group across multiple Availability Zones. A DevOps Engineer is tasked with minimizing application response times and improving availability for users in both Regions.

Which combination of actions should be taken to address the latency issues? (Choose three.)

Create a new DynamoDB table in the new Region with cross-Region replication enabled.

Create new ALB and Auto Scaling group global resources and configure the new ALB to direct traffic to the new Auto Scaling group.

Create new ALB and Auto Scaling group resources in the new Region and configure the new ALB to direct traffic to the new Auto Scaling group.

Create Amazon Route 53 records, health checks, and latency-based routing policies to route to the ALB.

Create Amazon Route 53 aliases, health checks, and failover routing policies to route to the ALB.

Convert the DynamoDB table to a global table.

Correct Answer: C, D, F

To address latency issues for users on a different continent, the best approach involves multiple actions. First, creating new ALB and Auto Scaling group resources in the new Region allows the application to serve traffic locally, reducing latency by geographically distributing the load (C). Additionally, setting up Amazon Route 53 with health checks and latency-based routing policies ensures that traffic is directed to the ALB with the least latency, which improves response times for users (D). Lastly, converting the DynamoDB table to a global table enables replication across multiple regions, providing low-latency access to database records for users in both regions and ensuring high availability (F). These combined actions will minimize application response times and improve availability for users in both regions.

Question 3 of 208

A DevOps engineer used an AWS CloudFormation custom resource to set up AD Connector. The AWS Lambda function executed and created AD Connector, but

CloudFormation is not transitioning from CREATE_IN_PROGRESS to CREATE_COMPLETE.

Which action should the engineer take to resolve this issue?

Ensure the Lambda function code has exited successfully.

Ensure the Lambda function code returns a response to the pre-signed URL.

Ensure the Lambda function IAM role has cloudformation:UpdateStack permissions for the stack ARN.

Ensure the Lambda function IAM role has ds:ConnectDirectory permissions for the AWS account.

Correct Answer: B

When using a custom resource in AWS CloudFormation, the Lambda function must respond to a pre-signed URL provided in the event it receives from CloudFormation. This URL is used by CloudFormation to get the status of the custom resource creation. If the Lambda function does not send a response to this URL, CloudFormation will not know that the resource creation has finished, resulting in the stack remaining in the CREATE_IN_PROGRESS state.

Question 4 of 208

A company plans to stop using Amazon EC2 key pairs for SSH access, and instead plans to use AWS Systems Manager Session Manager. To further enhance security, access to Session Manager must take place over a private network only.

Which combinations of actions will accomplish this? (Choose two.)

Allow inbound access to TCP port 22 in all associated EC2 security groups from the VPC CIDR range.

Attach an IAM policy with the necessary Systems Manager permissions to the existing IAM instance profile.

Create a VPC endpoint for Systems Manager in the desired Region.

Deploy a new EC2 instance that will act as a bastion host to the rest of the EC2 instance fleet.

Remove any default routes in the associated route tables.

Correct Answer: B, C

To use AWS Systems Manager Session Manager securely over a private network, two actions are critical. First, attaching an IAM policy with the necessary Systems Manager permissions to the existing IAM instance profile is essential because it grants the EC2 instances permissions to utilize Systems Manager. Second, creating a VPC endpoint for Systems Manager in the desired Region ensures that communication between the instances and Systems Manager occurs over the private network, without traversing the internet. This setup provides enhanced security for access to Session Manager within a private network.

Question 5 of 208

A company runs an application with an Amazon EC2 and on-premises configuration. A DevOps Engineer needs to standardize patching across both environments. Company policy dictates that patching only happens during non-business hours.

Which combination of actions will meet these requirements? (Choose three.)

Add the physical machines into AWS Systems Manager using Systems Manager Hybrid Activations.

Attach an IAM role to the EC2 instances, allowing them to be managed by AWS Systems Manager.

Create IAM access keys for the on-premises machines to interact with AWS Systems Manager.

Execute an AWS Systems Manager Automation document to patch the systems every hour.

Use Amazon CloudWatch Events scheduled events to schedule a patch window.

Use AWS Systems Manager Maintenance Windows to schedule a patch window.

Correct Answer: A, B, F

To standardize patching across Amazon EC2 and on-premises configurations while adhering to the company's policy of patching only during non-business hours, a combination of the following actions is required: Adding the physical machines into AWS Systems Manager using Systems Manager Hybrid Activations is essential to manage the on-premises machines (A). Attaching an IAM role to the EC2 instances will allow those instances to be managed by AWS Systems Manager, providing the necessary permissions (B). Finally, using AWS Systems Manager Maintenance Windows is crucial for scheduling the patch window during non-business hours (F). These steps ensure that both environments are consistently and securely patched according to the specified schedule.