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Amazon DOP-C01 Practice Test - Questions Answers, Page 23

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Question 221

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A development team manages website deployments using AWS CodeDeploy blue/green deployments. The application is running on Amazon EC2 instances behind an Application Load Balancer in an Auto Sc

Question 222

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A government agency is storing highly confidential files in an encrypted Amazon S3 bucket. The agency has configured federated access and has allowed only a particular on-premises Active Directory u

Question 223

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A highly regulated company has a policy that DevOps Engineers should not log in to their Amazon EC2 instances except in emergencies. If a DevOps Engineer does log in, the Security team must be notif

Question 224

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What is the purpose of a Docker swarm worker node?

Question 225

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What is AWS CloudTrail Processing Library?

Question 226

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An online retail company based in the United States plans to expand its operations to Europe and Asia in the next six months. Its product currently runs on Amazon EC2 instances behind an Application

Question 227

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You need to run a very large batch data processing job one time per day. The source data exists entirely in S3, and the output of the processing job should also be written to S3 when finished. If yo

Question 228

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You are responsible for a large-scale video transcoding system that operates with an Auto Scaling group of video transcoding workers. The Auto Scaling group is configured with a minimum of 750 Amazo

Question 229

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A company runs an application on Amazon EC2 instances behind an Application Load Balancer. The instances run in an Amazon EC2 Auto Scaling group across multiple Availability Zones in us-east-1. The

Question 230

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A developer has written an application that writes data to Amazon DynamoDB. The DynamoDB table has been configured to use conditional writes. During peak usage times, writes are failing due to a Con

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 221

A development team manages website deployments using AWS CodeDeploy blue/green deployments. The application is running on Amazon EC2 instances behind an Application Load Balancer in an Auto Scaling group. When deploying a new revision, the team notices the deployment eventually fails, but it takes a long time to fail. After further inspection, the team discovers the AllowTraffic lifecycle event ran for an hour and eventually failed without providing any other information. The team wants to ensure failure notices are delivered more quickly while maintaining application availability even upon failure. Which combination of actions should be taken to meet these requirements? (Choose two.)

Change the deployment configuration to CodeDeployDefault.AllAtOnce to speed up the deployment process by deploying to all of the instances at the same time.

Create a CodeDeploy trigger for the deployment failure event and make the deployment fail as soon as a single health check failure is detected.

Reduce the HealthCheckIntervalSeconds and UnhealthyThresholdCount values within the target group health checks to decrease the amount of time it takes for the application to be considered unhealthy.

Use the appspec.yml file to run a script on the AllowTraffic hook to perform lighter health checks on the application instead of making CodeDeploy wait for the target group health checks to pass.

Use the appspec,yml file to run a script on the BeforeAllowTraffic hook to perform hearth checks on the application and fail the deployment if the health checks performed by the script are not successful.

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Question 222

A government agency is storing highly confidential files in an encrypted Amazon S3 bucket. The agency has configured federated access and has allowed only a particular on-premises Active Directory user group to access this bucket. The agency wants to maintain audit records and automatically detect and revert any accidental changes administrators make to the IAM policies used for providing this restricted federated access. Which of the following options provide the FASTEST way to meet these requirements?

Configure an Amazon CloudWatch Events Event Bus on an AWS CloudTrail API for triggering the AWS Lambda function that detects and reverts the change.

Configure an AWS Config rule to detect the configuration change and execute an AWS Lambda function to revert the change.

Schedule an AWS Lambda function that will scan the IAM policy attached to the federated access role for detecting and reverting any changes.

Restrict administrators in the on-premises Active Directory from changing the IAM policies.

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Question 223

A highly regulated company has a policy that DevOps Engineers should not log in to their Amazon EC2 instances except in emergencies. If a DevOps Engineer does log in, the Security team must be notified within 15 minutes of the occurrence.

Which solution will meet these requirements?

Install the Amazon Inspector agent on each EC2 instance. Subscribe to Amazon CloudWatch Events notifications. Trigger an AWS Lambda function to check if a message is about user logins. If it is, send a notification to the Security team using Amazon SNS.

Install the Amazon CloudWatch agent on each EC2 instance. Configure the agent to push all logs to Amazon CloudWatch Logs and set up a CloudWatch metric filter that searches for user logins. If a login is found, send a notification to the Security team using Amazon SNS.

Set up AWS CloudTrail with Amazon CloudWatch Logs. Subscribe CloudWatch Logs to Amazon Kinesis. Attach AWS Lambda to Kinesis to parse and determine if a log contains a user login. If it does, send a notification to the Security team using Amazon SNS.

Set up a script on each Amazon EC2 instance to push all logs to Amazon S3. Set up an S3 event to trigger an AWS Lambda function, which triggers an Amazon Athena query to run. The Athena query checks for logins and sends the output to the Security team using Amazon SNS.

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Question 224

What is the purpose of a Docker swarm worker node?

scheduling services

service swarm node HTTP API endpoints

executing containers

maintaining cluster state

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Question 225

What is AWS CloudTrail Processing Library?

A static library with CloudTrail log files in a movable format machine code that is directly executable

An object library with CloudTrail log files in a movable format machine code that is usually not directly executable

A Java library that makes it easy to build an application that reads and processes CloudTrail log files

A PHP library that renders various generic containers needed for CloudTrail log files

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Question 226

An online retail company based in the United States plans to expand its operations to Europe and Asia in the next six months. Its product currently runs on Amazon EC2 instances behind an Application Load Balancer. The instances run in an Amazon EC2 Auto Scaling group across multiple Availability Zones. All data is stored in an Amazon Aurora database instance. When the product is deployed in multiple regions, the company wants a single product catalog across all regions, but for compliance purposes, its customer information and purchases must be kept in each region. How should the company meet these requirements with the LEAST amount of application changes?

Use Amazon Redshift for the product catalog and Amazon DynamoDB tables for the customer information and purchases.

Use Amazon DynamoDB global tables for the product catalog and regional tables for the customer information and purchases.

Use Aurora with read replicas for the product catalog and additional local Aurora instances in each region for the customer information and purchases.

Use Aurora for the product catalog and Amazon DynamoDB global tables for the customer information and purchases.

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Question 227

You need to run a very large batch data processing job one time per day. The source data exists entirely in S3, and the output of the processing job should also be written to S3 when finished. If you need to version control this processing job and all setup and teardown logic for the system, what approach should you use?

Model an AWS EMR job in AWS Elastic Beanstalk.

Model an AWS EMR job in AWS CloudFormation.

Model an AWS EMR job in AWS OpsWorks.

Model an AWS EMR job in AWS CLI Composer.

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Question 228

You are responsible for a large-scale video transcoding system that operates with an Auto Scaling group of video transcoding workers. The Auto Scaling group is configured with a minimum of 750 Amazon EC2 instances and a maximum of 1000 Amazon EC2 instances. You are using Amazon SQS to pass a message containing the URI for a video stored in Amazon S3 to the transcoding workers. An Amazon CloudWatch alarm has notified you that the queue depth is becoming very large. How can you resolve the alarm without the risk of increasing the time to transcode videos? (Choose two.)

Create a second queue in Amazon SQS.

Adjust the Amazon CloudWatch alarms for a higher queue depth.

Create a new Auto Scaling group with a launch configuration that has a larger Amazon EC2 instance type.

Add an additional Availability Zone to the Auto Scaling group configuration.

Change the Amazon CloudWatch alarm so that it monitors the CPU utilization of the Amazon EC2 instances rather than the Amazon SQS queue depth.

Adjust the Auto Scaling group configuration to increase the maximum number of Amazon EC2 instances.

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Question 229

A company runs an application on Amazon EC2 instances behind an Application Load Balancer. The instances run in an Amazon EC2 Auto Scaling group across multiple Availability Zones in us-east-1. The application stores data in an Amazon RDS MySQL Multi-AZ DB instance.

A DevOps engineer wants to modify the current solution and create a hot standby of the environment in another region to minimize downtime if a problem occurs in us-east-1. Which combination of steps should the DevOps engineer take to meet these requirements? (Choose three.)

Add a health check to the Amazon Route 53 alias record to evaluate the health of the primary region. Use AWS Lambda, configured with an Amazon CloudWatch Events trigger, to promote the Amazon RDS read replica in the disaster recovery region.

Create a new Application Load Balancer and Amazon EC2 Auto Scaling group in the disaster recovery region.

Extend the current Amazon EC2 Auto Scaling group to the subnets in the disaster recovery region.

Enable multi-region failover for the RDS configuration for the database instance.

Deploy a read replica of the RDS instance in the disaster recovery region.

Create an AWS Lambda function to evaluate the health of the primary region. If it fails, modify the Amazon Route 53 record to point at the disaster recovery region and promote the RDS read replica.

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Question 230

A developer has written an application that writes data to Amazon DynamoDB. The DynamoDB table has been configured to use conditional writes. During peak usage times, writes are failing due to a ConditionalCheckFailedException error.

How can the developer increase the application’s reliability when multiple clients are attempting to write to the same record?

Write the data to an Amazon SNS topic.

Increase the amount of write capacity for the table to anticipate short-term spikes or bursts in write operations.

Implement a caching solution, such as DynamoDB Accelerator or Amazon ElastiCache.

Implement error retries and exponential backoff with jitter.

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Total 557 questions