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Amazon DOP-C01 Practice Test - Questions Answers, Page 33

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Question 321

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From a compliance and security perspective, which of these statements is true?

Question 322

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The resources for a business-critical, three-tier web application are expressed in a series of AWS CloudFormation templates. The application is using Amazon RDS for data and Amazon ElastiCache for s

Question 323

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You have an application running on multiple Amazon EC2 instances within an Auto Scaling group. You notice that instances are being re-spawned as their health checks are failing in Amazon EC2. Howeve

Question 324

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What does it mean if you have zero IOPS and a non-empty I/O queue for all EBS volumes attached to a running EC2 instance?

Question 325

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A DevOps engineer is planning to deploy a Ruby-based application to production. The application needs to interact with an Amazon RDS for MySQL database and should have automatic scaling and high ava

Question 326

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What is the default maximum number of Roles per AWS account?

Question 327

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A DevOps Engineer is asked to implement a strategy for deploying updates to a web application with zero downtime. The application infrastructure is defined in AWS CloudFormation and is made up of an

Question 328

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A company has a website in an AWS Elastic Beanstalk load balancing and automatic scaling environment. This environment has an Amazon RDS MySQL instance configured as its database resource. After a s

Question 329

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A company is implementing AWS CodePipeline to automate its testing process. The company wants to be notified when the execution state fails and used the following custom event pattern in Amazon Clou

Question 330

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A DevOps Engineer must implement monitoring for a workload running on Amazon EC2 and Amazon RDS MySQL. The monitoring must include: Application logs and operating system metrics for the Amazon EC2

Related questions

Which of these is not an instrinsic function in AWS CloudFormation?

After a daily scrum with your development teams, you've agreed that using Blue/Green style deployments would benefit the team. Which technique should you use to deliver this new requirement?

An application has microservices spread across different AWS accounts and is integrated with an on-premises legacy system for some of its functionality. Because of the segmented architecture and missing logs, every time the application experiences issues, it is taking too long to gather the logs to identify the issues. A DevOps Engineer must fix the log aggregation process and provide a way to centrally analyze the logs. Which is the MOST efficient and cost-effective solution?

For AWS Auto Scaling, what is the first transition state an existing instance enters after leaving steady state in Standby mode?

A DevOps Engineer must create a Linux AMI in an automated fashion. The newly created AMI identification must be stored in a location where other build pipelines can access the new identification programmatically What is the MOST cost-effective way to do this?

A company hosts parts of a Python-based application using AWS Elastic Beanstalk. An Elastic Beanstalk CLI is being used to create and update the environments. The Operations team detected an increase in requests in one of the Elastic Beanstalk environments that caused downtime overnight. The team noted that the policy used for AWS Auto Scaling is NetworkOut. Based on load testing metrics, the team determined that the application needs to scale CPU utilization to improve the resilience of the environments. The team wants to implement this across all environments automatically. Following AWS recommendations, how should this automation be implemented?

If you want CloudFormation stack status updates to show up in a continuous delivery system in as close to real time as possible, how should you achieve this?

A company updated the AWS CloudFormation template for a critical business application. The stack update process failed due to an error in the updated template, and AWS CloudFormation automatically began the stack rollback process. Later, a DevOps engineer discovered that the application was still unavailable and that the stack was in the UPDATE_ROLLBACK_FAILED state. Which combination of actions should the DevOps engineer perform so that the stack rollback can complete successfully? (Choose two.)

You have an application running on an Amazon EC2 instance and you are using IAM roles to securely access AWS Service APIs. How can you configure your application running on that instance to retrieve the API keys for use with the AWS SDKs?

A company has a web application that uses AWS Elastic Beanstalk, Amazon S3, and Amazon DynamoDB to develop a web application. The web application has increased dramatically in popularity, resulting in unpredictable spikes in traffic. A DevOps Engineer has noted that 90% of the requests are duplicate read requests to the DynamoDB table and the images stored in an S3 bucket. How can the Engineer improve the performance of the website?

Question 321

From a compliance and security perspective, which of these statements is true?

You do not ever need to rotate access keys for AWS IAM Users.

You do not ever need to rotate access keys for AWS IAM Roles, nor AWS IAM Users.

None of the other statements is true.

You do not ever need to rotate access keys for AWS IAM Roles.

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The resources for a business-critical, three-tier web application are expressed in a series of AWS CloudFormation templates. The application is using Amazon RDS for data and Amazon ElastiCache for session state. Users have reported degraded performance in the application. A DevOps Engineer notices that the T2 instance type is being used for the application tier and CPU usage is at 100% in Amazon CloudWatch.

What process should the Engineer follow to restore operations with the LEAST amount of disruption to the end users?

Write a new CloudFormation template to include Amazon CloudFront in the environment, launch the stack, and update the Amazon Route 53 A record

Launch a new CloudFormation stack for the application tier using the M4 instance type, run acceptance tests against the new stack, and update the Amazon Route 53 A record

Update the CloudFormation stack for the application tier using the T2 Unlimited option, run acceptance tests against the new stack, and update the Amazon Route 53 A record

Launch a new CloudFormation stack for all tiers of the application in a different region, run acceptance tests against the new stack, and update the Amazon Route 53 A record

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Question 323

You have an application running on multiple Amazon EC2 instances within an Auto Scaling group. You notice that instances are being re-spawned as their health checks are failing in Amazon EC2. However, before you have a chance to diagnose the issue, the affected instances are being terminated by the Auto Scaling service. You receive notifications of health checks failing and investigate within 20 minutes. However, this is not enough time to troubleshoot the issue. What should you change that will enable you to troubleshoot the instance before it is terminated by the Auto Scaling service, while keeping costs minimal?

Install the Amazon CloudWatch Logs Agent on the instance and configure application and system logs to be sent to the CloudWatch Logs service.

Configure an Amazon SNS topic and associate it with your Auto Scaling group's CloudWatch alarms. Configure an Amazon SQS queue as a subscriber of this topic, and then create a fleet of Amazon EC2 workers that poll this queue and instruct the Amazon EC2 Auto Scaling API to remove the instance from the Auto Scaling group when an alarm is triggered.

Create an Auto Scaling Group lifecycle hook to hold the instance in a terminating:wait state until you have completed any troubleshooting. When you have completed troubleshooting, wait for the terminating state to expire, or notify to Scaling to complete the lifecycle hook and terminate the Instance.

Change the "DeleteOnTermination" flag to false in the Auto Scaling group configuration to ensure that instances are not deleted in the future.

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Question 324

What does it mean if you have zero IOPS and a non-empty I/O queue for all EBS volumes attached to a running EC2 instance?

The I/O queue is buffer flushing.

Your EBS disk head(s) is/are seeking magnetic stripes.

The EBS volume is unavailable.

You need to re-mount the EBS volume in the OS.

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Question 325

A DevOps engineer is planning to deploy a Ruby-based application to production. The application needs to interact with an Amazon RDS for MySQL database and should have automatic scaling and high availability. The stored data in the database is critical and should persist regardless of the state of the application stack.

The DevOps engineer needs to set up an automated deployment strategy for the application with automatic rollbacks. The solution also must alert the application team when a deployment fails. Which combination of steps will meet these requirements? (Choose three.)

Deploy the application on AWS Elastic Beanstalk. Deploy an Amazon RDS for MySQL DB instance as part of the Elastic Beanstalk configuration.

Deploy the application on AWS Elastic Beanstalk. Deploy a separate Amazon RDS for MySQL DB instance outside of Elastic Beanstalk.

Configure a notification email address that alerts the application team in the AWS Beanstalk configuration.

Configure an Amazon EventBridge (Amazon CloudWatch Events) rule to monitor AWS Health events. Use an Amazon Simple Notification Service (Amazon SNS) topic as a target to alert the application team.

Use the immutable deployment method to deploy new application versions.

Use the rolling deployment method to deploy new application versions.

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Question 326

What is the default maximum number of Roles per AWS account?

500

250

100

There is no limit.

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Question 327

A DevOps Engineer is asked to implement a strategy for deploying updates to a web application with zero downtime. The application infrastructure is defined in AWS CloudFormation and is made up of an Amazon Route 53 record, an Application Load Balancer, Amazon EC2 instances in an EC2 Auto Scaling group, and Amazon DynamoDB tables. To avoid downtime, there must be an active instance serving the application at all times. Which strategies will ensure the deployment happens with zero downtime? (Choose two.)

In the CloudFormation template, modify the AWS::AutoScaling::AutoscalingGroup resource and add an UpdatePolicy attribute to define the required elements for a deployment with zero downtime.

In the CloudFormation template, modify the AWS:: AutoScaling::DeploymentUpdates resource and add an UpdatePolicy attribute to define the required elements for a deployment with zero downtime.

Add a new Application Load Balancer and Auto Scaling group to the CloudFormation template. Deploy new changes to the inactive Auto Scaling group. Use Route 53 to change the active Application Load Balancer.

Add a new Application Load Balancer and Auto Scaling group to the CloudFormation template. Modify the AWS::AutoScaling::AutoScalingGroup resource and add an UpdatePolicy attribute to perform rolling updates.

In the CloudFormation template, modify the UpdatePolicy attribute for the CloudFormation stack and specify the Auto Scaling group that will be updated. Configure MinSuccessfulInstancesPercent and PauseTime to ensure the deployment happens with zero downtime.

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Question 328

A company has a website in an AWS Elastic Beanstalk load balancing and automatic scaling environment. This environment has an Amazon RDS MySQL instance configured as its database resource. After a sudden increase in traffic, the website started dropping traffic. An administrator discovered that the application on some instances is not responding as the result of out-of-memory errors. Classic Load Balancer marked those instances as out of service, and the health status of Elastic Beanstalk enhanced health reporting is degraded. However, Elastic Beanstalk did not replace those instances. Because of the diminished capacity behind the Classic Load Balancer, the application response times are slower for the customers.

Which action will permanently fix this issue?

Clone the Elastic Beanstalk environment. When the new environment is up, swap CNAME and terminate the earlier environment.

Temporarily change the maximum number of instances in the Auto Scaling group to allow the group to support more traffic.

Change the setting for the Auto Scaling group health check from Amazon EC2 to Elastic Load Balancing, and increase the capacity of the group.

Write a cron script for restarting the web server process when memory is full, and deploy it with AWS Systems Manager.

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Question 329

A company is implementing AWS CodePipeline to automate its testing process. The company wants to be notified when the execution state fails and used the following custom event pattern in Amazon CloudWatch:

Which type of events will match this event pattern?

Failed deploy and build actions across all the pipelines.

All rejected or failed approval actions across all the pipelines.

All the events across all pipelines.

Approval actions across all the pipelines.

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Question 330

A DevOps Engineer must implement monitoring for a workload running on Amazon EC2 and Amazon RDS MySQL. The monitoring must include:

Application logs and operating system metrics for the Amazon EC2 instances Database logs and operating system metrics for the Amazon RDS database Which steps should the Engineer take?

Install an Amazon CloudWatch agent on the EC2 and RDS instances. Configure the agent to send the operating system metrics and application and database logs to CloudWatch.

Install an Amazon CloudWatch agent on the EC2 instance, and configure the agent to send the application logs and operating system metrics to CloudWatch. Enable RDS Enhanced Monitoring, and modify the RDS instance to publish database logs to CloudWatch Logs.

Install an Amazon CloudWatch Logs agent on the EC2 instance and configure it to send application logs to CloudWatch.

Set up scheduled tasks on the EC2 and RDS instances to put operating system metrics and application and database logs into an Amazon S3 bucket. Set up an event on the bucket to invoke an AWS Lambda function to monitor for errors each time an object is put into the bucket.

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