Amazon DOP-C01 Practice Test - Questions Answers, Page 7
List of questions
Question 61
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You are designing an enterprise data storage system. Your data management software system requires mountable disks and a real filesystem, so you cannot use S3 for storage. You need persistence, so you will be using AWS EBS Volumes for your system. The system needs as lowcost storage as possible, and access is not frequent or high throughput, and is mostly sequential reads. Which is the most appropriate EBS Volume Type for this scenario?
Explanation:
Standard volumes, or Magnetic volumes, are best for: Cold workloads where data is infrequently accessed, or scenarios where the lowest storage cost is important.
Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/EBSVolumeTypes.html
Question 62
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You meet once per month with your operations team to review the past month's data. During the meeting, you realize that 3 weeks ago, your monitoring system which pings over HTTP from outside AWS recorded a large spike in latency on your 3- tier web service API. You use DynamoDB for the database layer, ELB, EBS, and EC2 for the business logic tier, and SQS, ELB, and EC2 for the presentation layer. Which of the following techniques will NOT help you figure out what happened?
Explanation:
Metrics data are available for 2 weeks. If you want to store metrics data beyond that duration, you can retrieve it using our GetMetricStatistics API as well as a number of applications and tools offered by AWS partners.
Reference: https://aws.amazon.com/cloudwatch/faqs/
Question 63
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Which command will start an assessment run?
Explanation:
Explanation: start-assessment-run command requires --assessment-template-arn, other parameters are optional start-assessment-run --assessment-template-arn [--assessment-run-name ] [--cli-input-json ] [--generate-cli-skeleton ]
Reference: http://docs.aws.amazon.com/cli/latest/reference/inspector/start-assessment-run.html
Question 64
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Which tool will Ansible not use, even if available, to gather facts?
Explanation:
Ansible will use its own `setup' module to gather facts for the local system. Additionally, if ohai or facter are installed, those will also be used and all variables will be prefixed with `ohai_' or `facter_' respectively. `lsb_relase' is a Linux tool for determining distribution information.
Reference: http://docs.ansible.com/ansible/setup_module.html
Question 65
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An Information Security policy requires that all publicly accessible systems be patched with critical OS security patches within 24 hours of a patch release. All instances are tagged with the Patch Group key set to 0. Two new AWS Systems Manager patch baselines for Windows and Red Hat Enterprise Linux (RHEL) with zero-day delay for security patches of critical severity were created with an auto-approval rule. Patch Group 0 has been associated with the new patch baselines.
Which two steps will automate patch compliance and reporting? (Choose two.)
Explanation:
Reference:
https://aws.amazon.com/blogs/mt/patching-your-windows-ec2-instances-using-aws-systems-manager-patch-manager/
Question 66
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What is the order of most-to-least rapidly-scaling (fastest to scale first)?
Explanation:
Lambda is designed to scale instantly. EC2 + ELB + Auto Scaling require single-digit minutes to scale out. RDS will take at least 15 minutes, and will apply OS patches or any other updates when applied.
Reference: https://aws.amazon.com/lambda/faqs/
Question 67
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A company wants to use a grid system for a proprietary enterprise in-memory data store on top of AWS. This system can run in multiple server nodes in any Linux-based distribution. The system must be able to reconfigure the entire cluster every time a node is added or removed. When adding or removing nodes, an /etc./cluster/nodes.config file must be updated, listing the IP addresses of the current node members of that cluster The company wants to automate the task of adding new nodes to a cluster. What can a DevOps Engineer do to meet these requirements?
Question 68
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Management has reported an increase in the monthly bill from Amazon web services, and they are extremely concerned with this increased cost. Management has asked you to determine the exact cause of this increase. After reviewing the billing report, you notice an increase in the data transfer cost. How can you provide management with a better insight into data transfer use?
Question 69
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You are building a Ruby on Rails application for internal, non-production use which uses MySQL as a database. You want developers without very much AWS experience to be able to deploy new code with a single command line push. You also want to set this up as simply as possible. Which tool is ideal for this setup?
Explanation:
Elastic Beanstalk's primary mode of operation exactly supports this use case out of the box. It is simpler than all the other options for this question. With Elastic Beanstalk, you can quickly deploy and manage applications in the AWS cloud without worrying about the infrastructure that runs those applications. AWS Elastic Beanstalk reduces management complexity without restricting choice or control. You simply upload your application, and Elastic Beanstalk automatically handles the details of capacity provisioning, load balancing, scaling, and application health monitoring.
Reference: http://docs.aws.amazon.com/elasticbeanstalk/latest/dg/create_deploy_Ruby_rails.html
Question 70
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A production account has a requirement that any Amazon EC2 instance that has been logged into manually must be terminated within 24 hours. All applications in the production account are using Auto Scaling groups with Amazon CloudWatch Logs agent configured. How can this process be automated?
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