Amazon AWS DevOps Engineer Professional Set 2

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Amazon AWS DevOps Engineer Professional Set 2

A retail company has adopted AWS OpsWorks for managing its deployments. In the last three months: the company has discovered that some production instances have been restarting without reason. Upon inspection of the AWS
CloudTrail logs, a DevOps Engineer determined that those instances were restarted by OpsWorks. The Engineer now wants automated email notifications whenever OpsWorks restarts an instance when the instance is deemed unhealthy or unable to communicate with the service endpoint. How can the Engineer meet this requirement?

Create a Chef recipe to place a cron to run a custom script within the Amazon EC2 instances that sends an email to the team by using Amazon SES if the OpsWorks agent detects an instance failure. Create an Amazon SNS topic and create a subscription for this topic that contains the destination email address. Create an Amazon CloudWatch rule: specify aws . opsworks as a source and specify auto-healing in the initiated_bydetails.Use the SNS topic as a target. Create an Amazon SNS topic and create a subscription for this topic that contains the destination email address. Create an Amazon CloudWatch rule specify aws. opsworks as a source and specify instance-replacement in theinitiated_bydetails. Use the SNS topic as a target. Create a subscription for this topic that contains the email address. Enable instance restart notifications within the OpsWorks layer and indicate the destination email address for the notification.

A company used AWS CloudFormation to deploy a three-tier web application that stores data in an Amazon RDS MySOL Multi-AZ DB instance. A DevOps Engineer must upgrade the RDS instance to the latest major version of MySQL while incurring minimal downtime.
How should the Engineer upgrade the instance while minimizing downtime?

Update the EngineVersion property of the AWS::RDS:: DBInstance resource type in the CloudFormation template to the latest desired version. Launch a second stack and make the new RDS instance a read replica. Update the DBEngineVersion property of the AWS: : RDS : :DBInstance resource type in the CloudFormation template to the latest desired version. Perform an Update Stack operation. Create a new RDS Read Replicas resource withthesame properties as the instance to be upgraded. Perform a second Update Stack operation. Update the DBEngineVersion property of the AWS: :RDS: :DB:Instance resource type in the CloudFormation template to the latest desired version. Create a new RDS Read Replicas resource with the same properties as the instancetobe upgraded. Perform an Update Stack operation. Update the EngineVersion property of the AWS :: RDS :: DBInstance resource type in the CloudFormation template to the latest version, and perform an Update Stack operation.

A company wants to use Amazon DynamoDB for maintaining metadata on its forums. See the sample data set in the image below.

A DevOps Engineer is required to define the table schema with the partition key, the sort key, the local secondary index, projected attributes, and fetch operations. The schema should support the following example searches using the least provisioned read capacity units to minimize cost.

--Search within ForumName for items where the subject starts with 'a'.
-Search forums within the given LastPostDateTime time frame.
-Return the thread value where LastPostDateTime is within the last three months.

Which schema meets the requirements?

Use Subject as the primary key and ForumName as the sort key. Have LSI with LastPostDateTime as the sort key and fetch operations for thread. Use ForumName as the primary key and Subject as the sort key. Have LSI with LastPostDateTime as the sort key and the projected attribute thread. Use ForumName as the primary key and Subject as the sort key. Have LSI with Thread as the sort key and the projected attribute LastPostDateTime. Use Subject as the primary key and ForumName as the sort key. Have LSI with Thread as the sort key and fetch operations for LastPostDateTime.

An application runs on Amazon EC2 instances behind an Application Load Balancer. Amazon RDS MySOL is used on the backend. The instances run in an Auto Scaling group across multiple Availability Zones. The Application Load Balancer health check ensures the web servers are operating and able to make read/write SQL connections. Amazon Route 53 provides DNS functionality with a record pointing to the Application Load Balancer. A new policy requires a geographically isolated disaster recovery site with an RTO of 4 hours and an RPO of 15 minutes. Which disaster recovery strategy will require the LEAST amount of changes to the application stack?

Launch a replica stack of everything except RDS in a different Availability Zone. Create an RDS read-only replica in a new Availability Zone and configure the new stack to point to the local RDS instance. Add the new stack to the

Route53 record set with a failover routing policy. Launch a replica stack of everything except RDS in a different region. Create an RDS read-only replica in a new region and configure the new stack to point to the local RDS instance. Add the new stack to the Route 53 record set withalatency routing policy. Launch a replica stack of everything except RDS in a different region. Upon failure, copy the snapshot over from the primary region to the disaster recovery region. Adjust the Amazon Route 53 record set to point to the disasterrecoveryregion's Application Load Balancer. Launch a replica stack of everything except RDS in a different region. Create an RDS read-only replica in a new region and configure the new stack to point to the local RDS instance. Add the new stack to the Amazon Route 53 recordsetwith a failover routing policy.

A company is using an AWS CloudFormation template to deploy web applications. The template requires that manual changes be made for each of the three major environments: production, staging, and development. The current sprint includes the new implementation and configuration of AWS CodePipeline for automated deployments.
What changes should the DevOps Engineer make to ensure that the CloudFormation template is reusable across multiple pipelines?

Use a CloudFormation custom resource to query the status of the CodePipeline to determine which environment is launched. Dynamically alter the launch configuration of the Amazon EC2 instances. Set up a CodePipeline pipeline for each environment to use input parameters. Use CloudFormation mappings to switch associated UserData for the Amazon EC2 instances to match the environment being launched. Set up a CodePipeline pipeline that has multiple stages, one for each development environment. Use AWS Lambda functions to trigger CloudFormation deployments to dynamically alter the UserData of the Amazon EC2instanceslaunched in each environment. Use CloudFormation input parameters to dynamically alter the LaunchConfiguration and UserData sections of each Amazon EC2 instance every time the CloudFormation stack is updated.

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