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Amazon AWS Certified DevOps Engineer - Professional Sample Questions (Q137-Q142):

NEW QUESTION # 137
You are a Devops Engineer for your company. You are responsible for creating Cloudformation templates for your company. There is a requirement to ensure that an S3 bucket is created for all resources in development for logging purposes. How would you achieve this?

A. Usethe metadata section in the Cloudformation template to decide on whether tocreate the S3 bucket or not.
B. Createseparate Cloudformation templates for Development and production.
C. Createa parameter in the Cloudformation template and then use the Condition clause inthe template to create an S3 bucket if the parameter has a value of development
D. Createan S3 bucket from before and then just provide access based on the tag valuementioned in the Cloudformation template

Answer: C

Explanation:
Explanation
The AWS Documentation mentions the following
You might use conditions when you want to reuse a template that can create resources in different contexts, such as a test environment versus a production environment In your template, you can add an CnvironmentType input parameter, which accepts either prod or test as inputs. For the production environment, you might include Amazon CC2 instances with certain capabilities; however, for the test environment, you want to use reduced capabilities to save money. With conditions, you can define which resources are created and how they're configured for each environment type.
For more information on Cloudformation conditions please visit the below url
* http://docs.aws.amazon.com/AWSCIoudFormation/latest/UserGuide/conditions-section-structure.htmI

NEW QUESTION # 138
A startup company is developing a web application on AWS. It plans to use Amazon RDS for persistence and deploy the application to Amazon EC2 with an Auto Scaling group. The company would also like to separate the environments for development, testing, and production. What is the MOST secure and flexible approach to manage the application configuration?

A. Create a property file for each environment to include the environment-specific configuration.
Create a private Amazon S3 bucket and save the property files in the bucket. Save the encrypted passwords in the AWS Systems Manager Parameter Store. Create an environment tag for the EC2 instances and tag the instances respectively. The application will read the needed property values from the environment-specific property file in the S3 bucket and the parameter store.
B. Create a property file to include the configuration and the encrypted passwords. Check in the property file to the source repository, package the property file with the application, and deploy the application.
Create an environment tag for the EC2 instances and tag the instances respectively. The application will extract the necessary property values based on the environment tag.
C. Create a property file for each environment to include the environment-specific configuration and an encrypted password. Check in the property files to the source repository. During deployment, use only the environment-specific property file with the application. The application will read the needed property values from the deployed property file.
D. Create a property file for each environment to include the environment-specific configuration.
Create a private Amazon S3 bucket and save the property files in the bucket. Save the passwords in the bucket with AWS KMS encryption. During deployment, the application will read the needed property values from the environment-specific property file in the S3 bucket.

Answer: D

NEW QUESTION # 139
Your company is planning to setup a wordpress application. The wordpress application will connect to a MySQL database. Part of the requirement is to ensure that the database environment is fault tolerant and highly available. Which of the following 2 options individually can help fulfil this requirement.

A. Create multiple EC2 instances in the same AZ. Host MySQL and enable replication via scripts between the instances.
B. Create a MySQL RDS environment with Multi-AZ feature enabled
C. Create multiple EC2 instances in separate AZ's. Host MySQL and enable replication via scripts between the instances.
D. Create a MySQL RDS environment and create a Read Replica

Answer: B,C

Explanation:
Explanation
One way to ensure high availability and fault tolerant environments is to ensure Instances are located across multiple availability zones. Hence if you are hosting MySQL yourself, ensure you have instances spread across multiple AZ's The AWS Documentation mentions the following about the multi-AZ feature Amazon RDS provides high availability and failover support for DB instances using Multi-AZ deployments.
Amazon RDS uses several different technologies to provide
failover support. Multi-AZ deployments for Oracle, PostgreSGL, MySQL, and MariaDB DB instances use Amazon's failover technology For more information on AWS Multi-AZ deployments, please visit the below URL:
* http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Concepts.MultiAZ.html

NEW QUESTION # 140
A healthcare company has a critical application running in AWS. Recently, the company experienced some down time. if it happens again, the company needs to be able to recover its application in another AWS Region. The application uses Elastic Load Balancing and Amazon EC2 instances. The company also maintains a custom AMI that contains its application. This AMI is changed frequently. The workload is required to run in the primary region, unless there is a regional service disruption, in which case traffic should fail over to the new region. Additionally, the cost for the second region needs to be low.
The RTO is 2 hours.
Which solution allows the company to fail over to another region in the event of a failure, and also meet the above requirements?

A. Maintain a copy of the AMI from the main region in the backup region. Create an Auto Scaling group with one instance using a launch configuration that contains the copied AMI. Use an Amazon Route 53 record to direct traffic to the load balancer in the backup region in the event of failure, as required.
Allow the Auto Scaling group to scale out as needed during a failure.
B. Automate the copying of the AMI in the main region to the backup region. Generate an AWS Lambda function that will create an EC2 instance from the AMI and place it behind a load balancer. Using the same Lambda function, point the Amazon Route 53 record to the load balancer in the backup region.
Trigger the Lambda function in the event of a failure.
C. Place the AMI in a replicated Amazon S3 bucket. Generate an AWS Lambda function that can create a launch configuration and assign it to an already created Auto Scaling group. Have one instance in this Auto Scaling group ready to accept traffic. Trigger the Lambda function in the event of a failure. Use an Amazon Route 53 record and modify it with the same Lambda function to point to the load balancer in the backup region.
D. Automate the copying of the AMI to the backup region. Create an AWS Lambda function that can create a launch configuration and assign it to an already created Auto Scaling group. Set the Auto Scaling group maximum size to 0 and only increase it with the Lambda function during a failure.
Trigger the Lambda function in the event of a failure. Use an Amazon Route 53 record and modify it with the same Lambda function to point to the load balancer in the backup region.

Answer: D

Explanation:
B is not the best answer. It will create an instance in the backup region which will have cost. We should keep the cost low by not starting up the instance unless failover.

NEW QUESTION # 141
You run a small online consignment marketplace. Interested sellers complete an online application in order to allow them to sell their products on your website.
Once approved, they can post their product using a custom interface.
From that pant, you manage the shopping cart process so that when a buyer decides to buy a product, you handle the billing and coordinate the shipping.
Part of this process requires sending emails to the buyer and the seller at different stages.
Your system has been running on AWS for a few months.
Occasionally, products are shipped before payment cleared and emails are sent out of order.
Furthermore, sometimes credit cards are being charged twice. How can you resolve these problems?

A. Use the Amazon Simple Workflow Service (SWF), and use a different set of workers for each task.
B. Use the Simple Email Service (SES) to control the correct order of email delivery.
C. Use the Amazon Simple Queue Service (SQS), and use a different set of workers for each task.
D. Use the Amazon Simple Queue Service (SQS), and use a single set of workers for each task.
E. Use the AWS Data Pipeline service to control the process flow of the various tasks.

Answer: A

NEW QUESTION # 142
......

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