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{Online Realistic} Amazon AWS-DevOps-Engineer-Professional Practice Test Questions

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Amazon AWS Certified DevOps Engineer - Professional Sample Questions (Q486-Q491):

NEW QUESTION # 486
A user is defining a policy for the IAM user. Which of the below mentioned elements can be found in an IAM policy?

A. Not Effect
B. Principal Resource
C. Version Management
D. Supported Data Types

Answer: D

Explanation:
A user can define various elements for an IAM policy. The elements include Version, ID, Statement, Sid, Effect, Principal, Not Principal, Action, Not Action, Resource, Not Resource, Condition, and Supported Data Types Reference:
http://docs.aws.amazon.com/IAM/latest/UserGuide/AccessPolicyLanguage_ElementDescriptions.
html

NEW QUESTION # 487
You use Amazon CloudWatch as your primary monitoring system for your web application. After a recent software deployment, your users are getting Intermittent 500 Internal Server Errors when using the web application. You want to create a CloudWatch alarm, and notify an on-call engineer when these occur.
How can you accomplish this using AWS services? Choose 3 answers

A. Create a CloudWatch Logs group and define metric filters that capture 500 Internal Server Errors. Set a CloudWatch alarm on that metric.
B. Use AWS Data Pipeline to stream web application logs from your servers to CloudWatch.
C. Use Amazon Simple Notification Service to notify an on-call engineer when a CloudWatch alarm is triggered.
D. Install a CloudWatch Logs Agent on your servers to stream web application logs to CloudWatch.
E. Deploy your web application as an AWS Elastic Beanstalk application. Use the default Elastic Beanstalk Cloudwatch metrics to capture 500 Internal Server Errors. Set a CloudWatch alarm on that metric.
F. Use Amazon Simple Email Service to notify an on-call engineer when a CloudWatch alarm is triggered.

Answer: A,C,D

NEW QUESTION # 488
You currently have the following setup in AWS
1) An Elastic Load Balancer
2) Auto Scaling Group which launches EC2 Instances
3) AMIs with your code pre-installed
You want to deploy the updates of your app to only a certain number of users. You want to have a cost-effective solution. You should also be able to revert back quickly. Which of the below solutions is the most feasible one?

A. Create new AM Is with the new app. Then use the new EC2 instances in half proportion to the older instances.
B. Create a full second stack of instances, cut the DNS over to the new stack of instances, and change the DNS back if a rollback is needed.
C. Create a second ELB, and a new Auto Scaling Group assigned a new Launch Configuration. Create a new AMI with the updated app. Use Route53 Weighted Round Robin records to adjust the proportion of traffic hitting the two ELBs.
D. Redeploy with AWS Elastic Beanstalk and Elastic Beanstalk versions. Use Route 53 Weighted Round Robin records to adjust the proportion of traffic hitting the two ELBs

Answer: C

Explanation:
Explanation
The Weighted Routing policy of Route53 can be used to direct a proportion of traffic to your application. The best option is to create a second CLB, attach the new Autoscaling Group and then use Route53 to divert the traffic.
Option B is wrong because just having EC2 instances running with the new code will not help.
Option C is wrong because Clastic beanstalk is good for development environments, and also there is no mention of having 2 environments where environment url's can be swapped.
Option D is wrong because you still need Route53 to split the traffic.
For more information on Route53 routing policies, please refer to the below link:
* http://docs.aws.amazon.com/Route53/latest/DeveloperGuide/routing-policy.html

NEW QUESTION # 489
A company plans to stop using Amazon EC2 key pairs for SSH access, and instead plans to use AWS Systems Manager Session Manager. To further enhance security, access to Session Manager must take place over a private network only.
Which combinations of actions will accomplish this? (Choose two.)

A. Attach an IAM policy with the necessary Systems Manager permissions to the existing IAM instance profile.
B. Create a VPC endpoint for Systems Manager in the desired Region.
C. Allow inbound access to TCP port 22 in all associated EC2 security groups from the VPC CIDR range.
D. Deploy a new EC2 instance that will act as a bastion host to the rest of the EC2 instance fleet.
E. Remove any default routes in the associated route tables.

Answer: A,D

Explanation:
Explanation/Reference:

NEW QUESTION # 490
What is the only layer in a Docker image that is not read-only?

A. none are read-only
B. the first layer
C. they are all read-only
D. the last layer

Answer: D

Explanation:
A Docker image is built up from a series of layers. Each layer represents an instruction in the image's Dockerfile. Each layer except the very last one is read-only.
Reference:
https://docs.docker.com/engine/userguide/storagedriver/imagesandcontainers/#images-and- layers

NEW QUESTION # 491
......

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