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Free AWS-DevOps Sample | Valid AWS-DevOps Exam Objectives

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Amazon AWS Certified DevOps Engineer - Professional Sample Questions (Q164-Q169):

NEW QUESTION # 164
When Ansible's connection state is set to `remote', what method of communication does Ansible utilize to run commands on the remote target host?

A. SSH
B. API call to Ansible client on host
C. RSH
D. PSExec

Answer: A

Explanation:
Explanation: Ansible does not require a client/server architecture and makes all remote connections over SSH.
Ansible utilizes the Paramiko Python libraries for SSH when the native system OpenSSH libraries do not meet the requirements. Also note, Ansible does require Python be installed on the target host. When the target host is Windows, it uses WinRS Reference:
http://docs.ansible.com/ansible/intro_getting_started.html#remote-connection-information

NEW QUESTION # 165
You are responsible for your company's large multi-tiered Windows-based web application running on Amazon EC2 instances situated behind a load balancer. While reviewing metrics, you've started noticing an upwards trend for slow customer page load time. Your manager has asked you to come up with a solution to ensure that customer load time is not affected by too many requests per second. Which technique would you use to solve this issue?

A. Re-deploy your infrastructure usingan AWS CloudFormation template. Configure Elastic Load Balancing health checks to initiate a new AWS CloudFormation stack when health checks return failed.
B. Re-deploy your infrastructure using AWS CloudFormation, Elastic Beanstalk, and Auto Scaling. Set up your Auto Scalinggroup policies to scale based on the number of requests per second as well as the current customer load time. *>/ D- Re-deploy your application using an Auto Scaling template. Configure the Auto Scaling template to spin up a new Elastic Beanstalk application when the customer load time surpasses your threshold.
C. Re-deploy your infrastructure using an AWS CloudFormation template. Spin up a second AWS CloudFormation stack. Configure Elastic Load Balancing SpillOver functionality to spill over any slow connections to the second AWS CloudFormation stack.

Answer: B

Explanation:
Explanation
Auto Scaling helps you ensure that you have the correct number of Amazon CC2 instances available to handle the load for your application. You create collections of CC2 instances, called Auto Scaling groups. You can specify the minimum number of instances in each Auto Scaling group, and Auto Scaling ensures that your group never goes below this size. You can specify the maximum number of instances in each Auto Scaling group, and Auto Scaling ensures that yourgroup never goes above this size. If you specify the desired capacity, either when you create the group or at any time thereafter.
Auto Scaling ensures that yourgroup has this many
instances. If you specify scaling policies, then Auto Scaling can launch or terminate instances as demand on your application increases or decreases.
Option A and B are invalid because Autoscaling is required to solve the issue to ensure the application can handle high traffic loads.
Option D is invalid because there is no Autoscaling template.
For more information on Autoscaling, please refer to the below document link: from AWS
* http://docs.aws.amazon.com/autoscaling/latest/userguide/Whatl sAutoScaling.html

NEW QUESTION # 166
You want to securely distribute credentials for your Amazon RDS instance to your fleet of web server instances. The credentials are stored in a file that is controlled by a configuration management system.
How do you securely deploy the credentials in an automated manner across the fleet of web server instances, which can number in the hundreds, while retaining the ability to roll back if needed?

A. Insert credential files into user data and use an instance lifecycle policy to periodically refresh the file from the user data.
B. Store your credential files in an Amazon S3 bucket. Use Amazon S3 server-side encryption on the credential files. Have a scheduled job that pulls down the credential files into the instances every 10 minutes.
C. Keep credential files as a binary blob in an Amazon RDS MySQL DB instance, and have a script on each Amazon EC2 instance that pulls the files down from the RDS instance.
D. Store the credential files in your version-controlled repository with the rest of your code. Use a parallel file copy program to send the credential files from your local machine to the Amazon EC2 instances.
E. Store the credential files in your version-controlled repository with the rest of your code. Have a post- commit action in version control that kicks off a job in your continuous integration system which securely copses the new credential files to all web server instances.

Answer: B

NEW QUESTION # 167
A company is deploying a new application that uses Amazon EC2 instances. The company needs a solution to query application logs and AWS account API activity. Which solution will meet these requirements?

A. Use the Amazon CloudWatch agent to send logs from the EC2 instances to Amazon CloudWatch Logs.
Configure AWS CloudTrail to deliver the API logs to Amazon S3. Use CloudWatch to query both sets of logs.
B. Use the Amazon CloudWatch agent to send logs from the EC2 instances to Amazon Kinesis. Configure AWS CloudTrail to deliver the API logs to Kinesis. Use Kinesis to load the data into Amazon Redshift.
Use Amazon Redshift to query both sets of logs.
C. Use the Amazon CloudWatch agent to send logs from the EC2 instances to Amazon S3. Use AWS CloudTrail to deliver the API logs to Amazon S3. Use Amazon Athena to query both sets of logs in Amazon S3.
D. Use the Amazon CloudWatch agent to send logs from the EC2 instances to Amazon CloudWatch Logs.
Configure AWS CloudTrail to deliver the API logs to CloudWatch Logs. Use CloudWatch Logs Insights to query both sets of logs.

Answer: A

NEW QUESTION # 168
Your CTO is very worried about the security of your AWS account. How best can you prevent hackers from
completely hijacking your account?

A. Useshort but complex password on the root account and any administrators.
B. Don'twrite down or remember the root account password after creating the AWSaccount.
C. UseMFA on all users and accounts, especially on the root account.
D. UseAWS 1AM Geo-Lock and disallow anyone from logging in except for in your city.

Answer: C

Explanation:
Explanation
The AWS documentation mentions the following on MFA
AWS Multi-Factor Authentication (MFA) is a simple best practice that adds an extra layer of protection on top
of your user name and password. With MFA enabled, when a user signs in to an AWS website, they will be
prompted for their user name and password (the first factor-what they know), as well as for an authentication
code from their AWS MFA device (the second factor-what they have). Taken together, these multiple factors
provide increased security for your AWS account settings and resources.
For more information on MFA please visit the below link
https://aws.ama zon.com/ia m/detai Is/mfa/

NEW QUESTION # 169
......

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