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NEW QUESTION 21
An n-tier application requires a table in an Amazon RDS MySQL DB instance to be dropped and repopulated at each deployment. This process can take several minutes and the web tier cannot come online until the process is complete. Currently, the web tier is configured in an Amazon EC2 Auto Scaling group, with instances being terminated and replaced at each deployment. The MySQL table is populated by running a SQL query through an AWS CodeBuild job.
What should be done to ensure that the web tier does not come online before the database is completely configured?

A. Modify the launch configuration of the Auto Scaling group to pause user data execution for 600 seconds, allowing the table to be populated.B. Use Amazon Aurora as a drop-in replacement for RDS MySQL. Use snapshots to populate the table with the correct data.C. Use AWS Step Functions to monitor and maintain the state of data population. Mark the database in service before continuing with the deployment.D. Use an EC2 Auto Scaling lifecycle hook to pause the configuration of the web tier until the table is populated.

Answer: D

 

NEW QUESTION 22
A social networking service runs a web API that allows its partners to search public posts. Post data is stored in Amazon DynamoDB and indexed by AWS Lambda functions, with an Amazon ES domain storing the indexes and providing search functionality to the application.
The service needs to maintain full capacity during deployments and ensure that failed deployments do not cause downtime or reduced capacity, or prevent subsequent deployments.
How can these requirements be met? (Select TWO )

A. Run the web.application in AWS Elastic Beanstalk with the deployment policy set to Rolling Deploy the Lambda functions, DynamoDB tables, and Amazon ES domain with an AWS CloudFormation template.B. Run the web application in AWS Elastic Beanstalk with the deployment policy set to Immutable Deploy the Lambda functions, DynamoDB tables, and Amazon ES domain with an AWS CloudFormation template.C. Deploy the web application, Lambda functions, DynamoDB tables, and Amazon ES domain in an AWS CloudFormation template. Deploy changes with an AWS CodeDeploy blue/green deployment.D. Run the web application in AWS Elastic Beanstalk with the deployment policy set to All at Once.
Deploy the Lambda functions, DynamoDB tables, and Amazon ES domain with an AWS CloudFormation template.E. Deploy the web application, Lambda functions, DynamoDB tables, and Amazon ES domain in an AWS CloudFormation template. Deploy changes with an AWS CodeDeploy in-place deployment.

Answer: B,E

 

NEW QUESTION 23
You run a clustered NoSQL database on AWS EC2 using AWS EBS. You need to reduce latency for database response times. Performance is the most important concern, not availability. You did not perform the initial setup, someone without much AWS knowledge did, so you are not sure if they configured everything optimally. Which of the following is NOT likely to be an issue contributing to increased latency?

A. The database and requesting system are both in the wrong Availability Zone.B. The database is not running in a placement group.C. The EBS Volumes are not using PIOPS.D. The EC2 instances are not EBS Optimized.

Answer: A

Explanation:
For the highest possible performance, all instances in a clustered database like this one should be in a single Availability Zone in a placement group, using EBS optimized instances, and using PIOPS SSD EBS Volumes. The particular Availability Zone the system is running in should not be important, as long as it is the same as the requesting resources.
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/placement-groups.html

 

NEW QUESTION 24
You run a clustered NoSQL database on AWS EC2 using AWS EBS. You need to reduce latency for database response times. Performance is the most important concern, not availability. You did not perform the initial setup, someone without much AWS knowledge did, so you are not sure if they configured everything optimally.
Which of the following is NOT likely to be an issue contributing to increased latency?

A. The database and requesting system are both in the wrong Availability Zone.B. The database is not running in a placement group.C. The EBS Volumes are not using PIOPS.D. The EC2 instances are not EBS Optimized.

Answer: A

Explanation:
For the highest possible performance, all instances in a clustered database like this one should be in a single Availability Zone in a placement group, using EBS optimized instances, and using PIOPS SSD EBS Volumes.
The particular Availability Zone the system is running in should not be important, as long as it is the same as the requesting resources.
Reference:
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/placement-groups.html

 

NEW QUESTION 25
You are in charge of designing Cloudformation templates for your company. One of the key requirements is to ensure that if a Cloudformation stack is deleted, a snapshot of the relational database is created which is part of the stack. How can you achieve this in the best possible way?

A. Create a new cloudformation template to create a snapshot of the relational database.B. Use the Deletion policy of the cloudformation template to ensure a snapshot is created of the relational database.C. Create a snapshot of the relational database beforehand so that when the cloudformation stack is deleted, the snapshot of the database will be present.D. Use the Update policy of the cloudformation template to ensure a snapshot is created of the relational database.

Answer: B

Explanation:
Explanation
The AWS documentation mentions the following
With the Deletion Policy attribute you can preserve or (in some cases) backup a resource when its stack is deleted. You specify a DeletionPolicy attribute for each resource that you want to control. If a resource has no DeletionPolicy attribute, AWS Cloud Formation deletes the resource by default. Note that this capability also applies to update operations that lead to resources being removed.
For more information on the Deletion policy, please visit the below URL:
* http://docs.aws.amazon.com/AWSCIoudFormation/latest/UserGuide/aws-attribute-deletionpolicy.html

 

NEW QUESTION 26
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