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最新的 AWS Certified DevOps Engineer DOP-C01 免費考試真題 (Q273-Q278):

問題 #273
Your company has an application hosted in AWS which makes use of DynamoDB. There is a requirement
from the IT security department to ensure that all source IP addresses which make calls to the DynamoDB
tables are recorded. Which of the following services can be used to ensure this requirement is fulfilled.

• A. AWSCIoudTrail
• B. AWSCode Pipeline
• C. AWSCIoudwatch
• D. AWSCode Commit

答案：A

解題說明：
Explanation
The AWS Documentation mentions the following
DynamoDB is integrated with CloudTrail, a service that captures low-level API requests made by or on behalf
of DynamoDB in your AWS account and delivers the log
files to an Amazon S3 bucket that you specify. CloudTrail captures calls made from the DynamoDB console
or from the DynamoDB low-level API. Using the
information collected by CloudTrail, you can determine what request was made to DynamoDB, the source IP
address from which the request was made, who made
the request, when it was made, and so on.
For more information on DynamoDB and Cloudtrail, please refer to the below link:
* http://docs.aws.a
mazon.com/amazondynamodb/latest/developerguide/logging-usi ng-cloudtrail.htm I

 

問題 #274
There is a requirement for an application hosted on a VPC to access the On-premise LDAP server. The VPC
and the On-premise location are connected via an I PSec VPN. Which of the below are the right options for
the application to authenticate each user. Choose 2 answers from the options below

• A. The application authenticates against LDAP and retrieves the name of an 1AM role associated with the
  user. The application then calls the 1AM Security Token Service to assume that 1AM role. The
  application can use the temporary credentials to access any AWS resources.
• B. The application authenticates against LDAP the application then calls the AWS identity and Access
  Management (1AM) Security service to log in to 1AM using the LDAP credentials the application can
  use the 1AM temporary credentials to access the appropriate AWS service.
• C. Develop an identity broker that authenticates against LDAP and then calls 1AM Security Token Service
  to get 1AM federated user credentials. The application calls the identity broker to get 1AM federated
  user credentials with access to the appropriate AWS service.
• D. Develop an identity broker that authenticates against 1AM security Token service to assume a 1AM role
  in order to get temporary AWS security credentials The application calls the identity broker to get AWS
  temporary security credentials.

答案：A,C

解題說明：
Explanation
When you have the need for an in-premise environment to work with a cloud environment, you would
normally have 2 artefacts for authentication purposes
* An identity store - So this is the on-premise store such as Active Directory which stores all the information
for the user's and the groups they below to.
* An identity broker - This is used as an intermediate agent between the on-premise location and the cloud
environment. In Windows you have a system known as Active Directory Federation services to provide this
facility.
Hence in the above case, you need to have an identity broker which can work with the identity store and the
Security Token service in aws. An example diagram of how this works from the aws documentation is given
below.

For more information on federated access, please visit the below link:
* http://docs.aws.amazon.com/IAM/latest/UserGuide/id_roles_common-scenarios_federated-users.htm
* I

 

問題 #275
You have been tasked with deploying a scalable distributed system using AWS OpsWorks. Your distributed system is required to scale on demand. As it is distributed, each node must hold a configuration file that includes the hostnames of the other instances within the layer. How should you configure AWS OpsWorks to manage scaling this application dynamically?

• A. Update this configuration file by writing a script to poll the AWS OpsWorks service API for new instances. Configure your base AMI to execute this script on Operating System startup.
• B. Create a Chef Recipe to update this configuration file, configure your AWS OpsWorks stack to use custom cookbooks, and assign this recipe to the Configure LifeCycle Event of the specific layer.
• C. Create a Chef Recipe to update this configuration file, configure your AWS OpsWorks stack to use custom cookbooks, and assign this recipe to execute when instances are launched.
• D. Configure your AWS OpsWorks layer to use the AWS-provided recipe for distributed host configuration, and configure the instance hostname and file path parameters in your recipes settings.

答案：B

解題說明：
Explanation
Please check the following AWS DOCs which provides details on the scenario. Check the example of
"configure".
https://docs.aws.amazon.com/opsworks/latest/userguide/workingcookbook-events.html You can use the Configure Lifecycle event This event occurs on all of the stack's instances when one of the following occurs:
* An instance enters or leaves the online state.
* You associate an Elastic IP address with an instance or disassociate one from an instance.
* You attach an Elastic Load Balancing load balancer to a layer, or detach one from a layer. Ensure the Opswork layer uses a custom Cookbook

For more information on Opswork stacks, please refer to the below document link: from AWS
* http://docs.aws.amazon.com/opsworks/latest/userguide/welcome_classic.html

 

問題 #276
You work for an insurance company and are responsible for the day-to-day operations of your company's online quote system used to provide insurance quotes to members of the public. Your company wants to use the application logs generated by the system to better understand customer behavior. Industry, regulations also require that you retain all application logs for the system indefinitely in order to investigate fraudulent claims in the future. You have been tasked with designing a log management system with the following requirements:
- All log entries must be retained by the system, even during unplanned instance failure.
- The customer insight team requires immediate access to the logs from the past seven days.
- The fraud investigation team requires access to all historic logs, but will wait up to 24 hours before these logs are available.
How would you meet these requirements in a cost-effective manner? (Choose three.)

• A. Configure your application to write logs to the instance's default Amazon EBS boot volume, because this storage already exists. Create a script that moves the logs from the instance to Amazon 53 once an hour.
• B. Create an Amazon S3 lifecycle configuration to move log files from Amazon S3 to Amazon Glacier after seven days.
• C. Configure your application to write logs to the instance's ephemeral disk, because this storage is free and has good write performance. Create a script that moves the logs from the instance to Amazon 53 once an hour.
• D. Configure your application to write logs to a separate Amazon EBS volume with the "delete on termination" field set to false. Create a script that moves the logs from the instance to Amazon S3 once an hour.
• E. Create a housekeeping script that runs on a T2 micro instance managed by an Auto Scaling group for high availability. The script uses the AWS API to identify any unattached Amazon EBS volumes containing log files. Your housekeeping script will mount the Amazon EBS volume, upload all logs to Amazon S3, and then delete the volume.
• F. Write a script that is configured to be executed when the instance is stopped or terminated and that will upload any remaining logs on the instance to Amazon S3.

答案：B,D,E

 

問題 #277
A company wants to use Amazon ECS to provide a Docker container runtime environment. For compliance reasons, all Amazon EBS volumes used in the ECS cluster must be encrypted. Rolling updates will be made to the cluster instances and the company wants the instances drained of all tasks before being terminated.
How can these requirements be met? (Select TWO.)

• A. Create an IAM role that allows the action ECS::EncryptedImage. Configure the AWS CLI and a profile to use this role. Start the cluster using the AWS CLI providing the --use-encrypted-image and --kms-key arguments to the create-cluster ECS command.
• B. Use AWS CodePipeline to build a pipeline that discovers the latest Amazon-provided ECS AMI, then copies the image to an encrypted AMI outputting the encrypted AMI ID. Use the encrypted AMI ID when deploying the cluster.
• C. Modify the default ECS AMI user data to create a script that executes docker rm ""f {id} for all running container instances. Copy the script to the /etc/ init.d/rc.d directory and execute chconfig enabling the script to run during operating system shutdown.
• D. Create an Auto Scaling lifecycle hook backed by an AWS Lambda function that uses the AWS SDK to mark a terminating instance as DRAINING. Prevent the lifecycle hook from completing until the running tasks on the instance are zero.
• E. Copy the default AWS CloudFormation template that ECS uses to deploy cluster instances. Modify the template resource EBS configuration setting to set 'Encrypted: True' and include the AWS KMS alias: 'aws/ebs' to encrypt the AMI.

答案：D,E

 

問題 #278
......

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